---
_id: '802'
abstract:
- lang: eng
text: Glycoinositolphosphoceramides (GIPCs) are complex sphingolipids present at
the plasma membrane of various eukaryotes with the important exception of mammals.
In fungi, these glycosphingolipids commonly contain an alpha-mannose residue (Man)
linked at position 2 of the inositol. However, several pathogenic fungi additionally
synthesize zwitterionic GIPCs carrying an alpha-glucosamine residue (GlcN) at
this position. In the human pathogen Aspergillus fumigatus, the GlcNalpha1,2IPC
core (where IPC is inositolphosphoceramide) is elongated to Manalpha1,3Manalpha1,6GlcNalpha1,2IPC,
which is the most abundant GIPC synthesized by this fungus. In this study, we
identified an A. fumigatus N-acetylglucosaminyltransferase, named GntA, and demonstrate
its involvement in the initiation of zwitterionic GIPC biosynthesis. Targeted
deletion of the gene encoding GntA in A. fumigatus resulted in complete absence
of zwitterionic GIPC; a phenotype that could be reverted by episomal expression
of GntA in the mutant. The N-acetylhexosaminyltransferase activity of GntA was
substantiated by production of N-acetylhexosamine-IPC in the yeast Saccharomyces
cerevisiae upon GntA expression. Using an in vitro assay, GntA was furthermore
shown to use UDP-N-acetylglucosamine as donor substrate to generate a glycolipid
product resistant to saponification and to digestion by phosphatidylinositol-phospholipase
C as expected for GlcNAcalpha1,2IPC. Finally, as the enzymes involved in mannosylation
of IPC, GntA was localized to the Golgi apparatus, the site of IPC synthesis.
author:
- first_name: Jakob
full_name: Engel, Jakob
last_name: Engel
- first_name: Philipp S
full_name: Schmalhorst, Philipp S
id: 309D50DA-F248-11E8-B48F-1D18A9856A87
last_name: Schmalhorst
orcid: 0000-0002-5795-0133
- first_name: Anke
full_name: Kruger, Anke
last_name: Kruger
- first_name: Christina
full_name: Muller, Christina
last_name: Muller
- first_name: Falk
full_name: Buettner, Falk
last_name: Buettner
- first_name: Françoise
full_name: Routier, Françoise
last_name: Routier
citation:
ama: Engel J, Schmalhorst PS, Kruger A, Muller C, Buettner F, Routier F. Characterization
of an N-acetylglucosaminyltransferase involved in Aspergillus fumigatus zwitterionic
glycoinositolphosphoceramide biosynthesis. Glycobiology. 2015;25(12):1423-1430.
doi:10.1093/glycob/cwv059
apa: Engel, J., Schmalhorst, P. S., Kruger, A., Muller, C., Buettner, F., &
Routier, F. (2015). Characterization of an N-acetylglucosaminyltransferase involved
in Aspergillus fumigatus zwitterionic glycoinositolphosphoceramide biosynthesis.
Glycobiology. Oxford University Press. https://doi.org/10.1093/glycob/cwv059
chicago: Engel, Jakob, Philipp S Schmalhorst, Anke Kruger, Christina Muller, Falk
Buettner, and Françoise Routier. “Characterization of an N-Acetylglucosaminyltransferase
Involved in Aspergillus Fumigatus Zwitterionic Glycoinositolphosphoceramide Biosynthesis.”
Glycobiology. Oxford University Press, 2015. https://doi.org/10.1093/glycob/cwv059.
ieee: J. Engel, P. S. Schmalhorst, A. Kruger, C. Muller, F. Buettner, and F. Routier,
“Characterization of an N-acetylglucosaminyltransferase involved in Aspergillus
fumigatus zwitterionic glycoinositolphosphoceramide biosynthesis,” Glycobiology,
vol. 25, no. 12. Oxford University Press, pp. 1423–1430, 2015.
ista: Engel J, Schmalhorst PS, Kruger A, Muller C, Buettner F, Routier F. 2015.
Characterization of an N-acetylglucosaminyltransferase involved in Aspergillus
fumigatus zwitterionic glycoinositolphosphoceramide biosynthesis. Glycobiology.
25(12), 1423–1430.
mla: Engel, Jakob, et al. “Characterization of an N-Acetylglucosaminyltransferase
Involved in Aspergillus Fumigatus Zwitterionic Glycoinositolphosphoceramide Biosynthesis.”
Glycobiology, vol. 25, no. 12, Oxford University Press, 2015, pp. 1423–30,
doi:10.1093/glycob/cwv059.
short: J. Engel, P.S. Schmalhorst, A. Kruger, C. Muller, F. Buettner, F. Routier,
Glycobiology 25 (2015) 1423–1430.
date_created: 2018-12-11T11:48:35Z
date_published: 2015-12-01T00:00:00Z
date_updated: 2021-01-12T08:16:33Z
day: '01'
department:
- _id: CaHe
doi: 10.1093/glycob/cwv059
external_id:
pmid:
- '26306635'
intvolume: ' 25'
issue: '12'
language:
- iso: eng
month: '12'
oa_version: None
page: 1423 - 1430
pmid: 1
publication: Glycobiology
publication_status: published
publisher: Oxford University Press
publist_id: '6851'
quality_controlled: '1'
scopus_import: 1
status: public
title: Characterization of an N-acetylglucosaminyltransferase involved in Aspergillus
fumigatus zwitterionic glycoinositolphosphoceramide biosynthesis
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 25
year: '2015'
...
---
_id: '1566'
abstract:
- lang: eng
text: Deposits of misfolded proteins in the human brain are associated with the
development of many neurodegenerative diseases. Recent studies show that these
proteins have common traits even at the monomer level. Among them, a polyglutamine
region that is present in huntingtin is known to exhibit a correlation between
the length of the chain and the severity as well as the earliness of the onset
of Huntington disease. Here, we apply bias exchange molecular dynamics to generate
structures of polyglutamine expansions of several lengths and characterize the
resulting independent conformations. We compare the properties of these conformations
to those of the standard proteins, as well as to other homopolymeric tracts. We
find that, similar to the previously studied polyvaline chains, the set of possible
transient folds is much broader than the set of known-to-date folds, although
the conformations have different structures. We show that the mechanical stability
is not related to any simple geometrical characteristics of the structures. We
demonstrate that long polyglutamine expansions result in higher mechanical stability
than the shorter ones. They also have a longer life span and are substantially
more prone to form knotted structures. The knotted region has an average length
of 35 residues, similar to the typical threshold for most polyglutamine-related
diseases. Similarly, changes in shape and mechanical stability appear once the
total length of the peptide exceeds this threshold of 35 glutamine residues. We
suggest that knotted conformers may also harm the cellular machinery and thus
lead to disease.
acknowledgement: 'We acknowledge the support by the EU Joint Programme in Neurodegenerative
Diseases (JPND AC14/00037) project. The project is supported through the following
funding organisations under the aegis of JPND—www.jpnd.eu: Ireland, HRB; Poland,
National Science Centre; and Spain, ISCIII. '
article_number: e1004541
author:
- first_name: Àngel
full_name: Gómez Sicilia, Àngel
last_name: Gómez Sicilia
- first_name: Mateusz K
full_name: Sikora, Mateusz K
id: 2F74BCDE-F248-11E8-B48F-1D18A9856A87
last_name: Sikora
- first_name: Marek
full_name: Cieplak, Marek
last_name: Cieplak
- first_name: Mariano
full_name: Carrión Vázquez, Mariano
last_name: Carrión Vázquez
citation:
ama: Gómez Sicilia À, Sikora MK, Cieplak M, Carrión Vázquez M. An exploration of
the universe of polyglutamine structures. PLoS Computational Biology. 2015;11(10).
doi:10.1371/journal.pcbi.1004541
apa: Gómez Sicilia, À., Sikora, M. K., Cieplak, M., & Carrión Vázquez, M. (2015).
An exploration of the universe of polyglutamine structures. PLoS Computational
Biology. Public Library of Science. https://doi.org/10.1371/journal.pcbi.1004541
chicago: Gómez Sicilia, Àngel, Mateusz K Sikora, Marek Cieplak, and Mariano Carrión
Vázquez. “An Exploration of the Universe of Polyglutamine Structures.” PLoS
Computational Biology. Public Library of Science, 2015. https://doi.org/10.1371/journal.pcbi.1004541.
ieee: À. Gómez Sicilia, M. K. Sikora, M. Cieplak, and M. Carrión Vázquez, “An exploration
of the universe of polyglutamine structures,” PLoS Computational Biology,
vol. 11, no. 10. Public Library of Science, 2015.
ista: Gómez Sicilia À, Sikora MK, Cieplak M, Carrión Vázquez M. 2015. An exploration
of the universe of polyglutamine structures. PLoS Computational Biology. 11(10),
e1004541.
mla: Gómez Sicilia, Àngel, et al. “An Exploration of the Universe of Polyglutamine
Structures.” PLoS Computational Biology, vol. 11, no. 10, e1004541, Public
Library of Science, 2015, doi:10.1371/journal.pcbi.1004541.
short: À. Gómez Sicilia, M.K. Sikora, M. Cieplak, M. Carrión Vázquez, PLoS Computational
Biology 11 (2015).
date_created: 2018-12-11T11:52:45Z
date_published: 2015-10-23T00:00:00Z
date_updated: 2023-02-23T14:05:55Z
day: '23'
ddc:
- '570'
department:
- _id: CaHe
doi: 10.1371/journal.pcbi.1004541
file:
- access_level: open_access
checksum: 8b67d729be663bfc9af04bfd94459655
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:16:21Z
date_updated: 2020-07-14T12:45:02Z
file_id: '5207'
file_name: IST-2016-478-v1+1_journal.pcbi.1004541.pdf
file_size: 1412511
relation: main_file
file_date_updated: 2020-07-14T12:45:02Z
has_accepted_license: '1'
intvolume: ' 11'
issue: '10'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '10'
oa: 1
oa_version: Published Version
publication: PLoS Computational Biology
publication_status: published
publisher: Public Library of Science
publist_id: '5605'
pubrep_id: '478'
quality_controlled: '1'
related_material:
record:
- id: '9714'
relation: research_data
status: public
scopus_import: 1
status: public
title: An exploration of the universe of polyglutamine structures
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 11
year: '2015'
...
---
_id: '9714'
article_processing_charge: No
author:
- first_name: Àngel
full_name: Gómez Sicilia, Àngel
last_name: Gómez Sicilia
- first_name: Mateusz K
full_name: Sikora, Mateusz K
id: 2F74BCDE-F248-11E8-B48F-1D18A9856A87
last_name: Sikora
- first_name: Marek
full_name: Cieplak, Marek
last_name: Cieplak
- first_name: Mariano
full_name: Carrión Vázquez, Mariano
last_name: Carrión Vázquez
citation:
ama: Gómez Sicilia À, Sikora MK, Cieplak M, Carrión Vázquez M. An exploration of
the universe of polyglutamine structures - submission to PLOS journals. 2015.
doi:10.1371/journal.pcbi.1004541.s001
apa: Gómez Sicilia, À., Sikora, M. K., Cieplak, M., & Carrión Vázquez, M. (2015).
An exploration of the universe of polyglutamine structures - submission to PLOS
journals. Public Library of Science . https://doi.org/10.1371/journal.pcbi.1004541.s001
chicago: Gómez Sicilia, Àngel, Mateusz K Sikora, Marek Cieplak, and Mariano Carrión
Vázquez. “An Exploration of the Universe of Polyglutamine Structures - Submission
to PLOS Journals.” Public Library of Science , 2015. https://doi.org/10.1371/journal.pcbi.1004541.s001.
ieee: À. Gómez Sicilia, M. K. Sikora, M. Cieplak, and M. Carrión Vázquez, “An exploration
of the universe of polyglutamine structures - submission to PLOS journals.” Public
Library of Science , 2015.
ista: Gómez Sicilia À, Sikora MK, Cieplak M, Carrión Vázquez M. 2015. An exploration
of the universe of polyglutamine structures - submission to PLOS journals, Public
Library of Science , 10.1371/journal.pcbi.1004541.s001.
mla: Gómez Sicilia, Àngel, et al. An Exploration of the Universe of Polyglutamine
Structures - Submission to PLOS Journals. Public Library of Science , 2015,
doi:10.1371/journal.pcbi.1004541.s001.
short: À. Gómez Sicilia, M.K. Sikora, M. Cieplak, M. Carrión Vázquez, (2015).
date_created: 2021-07-23T12:05:28Z
date_published: 2015-10-23T00:00:00Z
date_updated: 2023-02-23T10:04:35Z
day: '23'
department:
- _id: CaHe
doi: 10.1371/journal.pcbi.1004541.s001
month: '10'
oa_version: Published Version
publisher: 'Public Library of Science '
related_material:
record:
- id: '1566'
relation: used_in_publication
status: public
status: public
title: An exploration of the universe of polyglutamine structures - submission to
PLOS journals
type: research_data_reference
user_id: 6785fbc1-c503-11eb-8a32-93094b40e1cf
year: '2015'
...
---
_id: '1537'
abstract:
- lang: eng
text: 3D amoeboid cell migration is central to many developmental and disease-related
processes such as cancer metastasis. Here, we identify a unique prototypic amoeboid
cell migration mode in early zebrafish embryos, termed stable-bleb migration.
Stable-bleb cells display an invariant polarized balloon-like shape with exceptional
migration speed and persistence. Progenitor cells can be reversibly transformed
into stable-bleb cells irrespective of their primary fate and motile characteristics
by increasing myosin II activity through biochemical or mechanical stimuli. Using
a combination of theory and experiments, we show that, in stable-bleb cells, cortical
contractility fluctuations trigger a stochastic switch into amoeboid motility,
and a positive feedback between cortical flows and gradients in contractility
maintains stable-bleb cell polarization. We further show that rearward cortical
flows drive stable-bleb cell migration in various adhesive and non-adhesive environments,
unraveling a highly versatile amoeboid migration phenotype.
acknowledged_ssus:
- _id: SSU
acknowledgement: 'We would like to thank R. Hausschild and E. Papusheva for technical
assistance and the service facilities at the IST Austria for continuous support.
The caRhoA plasmid was a kind gift of T. Kudoh and A. Takesono. We thank M. Piel
and E. Paluch for exchanging unpublished data. '
author:
- first_name: Verena
full_name: Ruprecht, Verena
id: 4D71A03A-F248-11E8-B48F-1D18A9856A87
last_name: Ruprecht
orcid: 0000-0003-4088-8633
- first_name: Stefan
full_name: Wieser, Stefan
id: 355AA5A0-F248-11E8-B48F-1D18A9856A87
last_name: Wieser
orcid: 0000-0002-2670-2217
- first_name: Andrew
full_name: Callan Jones, Andrew
last_name: Callan Jones
- first_name: Michael
full_name: Smutny, Michael
id: 3FE6E4E8-F248-11E8-B48F-1D18A9856A87
last_name: Smutny
orcid: 0000-0002-5920-9090
- first_name: Hitoshi
full_name: Morita, Hitoshi
id: 4C6E54C6-F248-11E8-B48F-1D18A9856A87
last_name: Morita
- first_name: Keisuke
full_name: Sako, Keisuke
id: 3BED66BE-F248-11E8-B48F-1D18A9856A87
last_name: Sako
orcid: 0000-0002-6453-8075
- first_name: Vanessa
full_name: Barone, Vanessa
id: 419EECCC-F248-11E8-B48F-1D18A9856A87
last_name: Barone
orcid: 0000-0003-2676-3367
- first_name: Monika
full_name: Ritsch Marte, Monika
last_name: Ritsch Marte
- first_name: Michael K
full_name: Sixt, Michael K
id: 41E9FBEA-F248-11E8-B48F-1D18A9856A87
last_name: Sixt
orcid: 0000-0002-6620-9179
- first_name: Raphaël
full_name: Voituriez, Raphaël
last_name: Voituriez
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Ruprecht V, Wieser S, Callan Jones A, et al. Cortical contractility triggers
a stochastic switch to fast amoeboid cell motility. Cell. 2015;160(4):673-685.
doi:10.1016/j.cell.2015.01.008
apa: Ruprecht, V., Wieser, S., Callan Jones, A., Smutny, M., Morita, H., Sako, K.,
… Heisenberg, C.-P. J. (2015). Cortical contractility triggers a stochastic switch
to fast amoeboid cell motility. Cell. Cell Press. https://doi.org/10.1016/j.cell.2015.01.008
chicago: Ruprecht, Verena, Stefan Wieser, Andrew Callan Jones, Michael Smutny, Hitoshi
Morita, Keisuke Sako, Vanessa Barone, et al. “Cortical Contractility Triggers
a Stochastic Switch to Fast Amoeboid Cell Motility.” Cell. Cell Press,
2015. https://doi.org/10.1016/j.cell.2015.01.008.
ieee: V. Ruprecht et al., “Cortical contractility triggers a stochastic switch
to fast amoeboid cell motility,” Cell, vol. 160, no. 4. Cell Press, pp.
673–685, 2015.
ista: Ruprecht V, Wieser S, Callan Jones A, Smutny M, Morita H, Sako K, Barone V,
Ritsch Marte M, Sixt MK, Voituriez R, Heisenberg C-PJ. 2015. Cortical contractility
triggers a stochastic switch to fast amoeboid cell motility. Cell. 160(4), 673–685.
mla: Ruprecht, Verena, et al. “Cortical Contractility Triggers a Stochastic Switch
to Fast Amoeboid Cell Motility.” Cell, vol. 160, no. 4, Cell Press, 2015,
pp. 673–85, doi:10.1016/j.cell.2015.01.008.
short: V. Ruprecht, S. Wieser, A. Callan Jones, M. Smutny, H. Morita, K. Sako, V.
Barone, M. Ritsch Marte, M.K. Sixt, R. Voituriez, C.-P.J. Heisenberg, Cell 160
(2015) 673–685.
date_created: 2018-12-11T11:52:35Z
date_published: 2015-02-12T00:00:00Z
date_updated: 2023-09-07T12:05:08Z
day: '12'
ddc:
- '570'
department:
- _id: CaHe
- _id: MiSi
doi: 10.1016/j.cell.2015.01.008
file:
- access_level: open_access
checksum: 228d3edf40627d897b3875088a0ac51f
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:13:21Z
date_updated: 2020-07-14T12:45:01Z
file_id: '5003'
file_name: IST-2016-484-v1+1_1-s2.0-S0092867415000094-main.pdf
file_size: 4362653
relation: main_file
file_date_updated: 2020-07-14T12:45:01Z
has_accepted_license: '1'
intvolume: ' 160'
issue: '4'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
page: 673 - 685
project:
- _id: 2529486C-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: T 560-B17
name: Cell- and Tissue Mechanics in Zebrafish Germ Layer Formation
- _id: 2527D5CC-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: I 812-B12
name: Cell Cortex and Germ Layer Formation in Zebrafish Gastrulation
publication: Cell
publication_status: published
publisher: Cell Press
publist_id: '5634'
pubrep_id: '484'
quality_controlled: '1'
related_material:
record:
- id: '961'
relation: dissertation_contains
status: public
scopus_import: 1
status: public
title: Cortical contractility triggers a stochastic switch to fast amoeboid cell motility
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 160
year: '2015'
...
---
_id: '10815'
abstract:
- lang: eng
text: In the last several decades, developmental biology has clarified the molecular
mechanisms of embryogenesis and organogenesis. In particular, it has demonstrated
that the “tool-kit genes” essential for regulating developmental processes are
not only highly conserved among species, but are also used as systems at various
times and places in an organism to control distinct developmental events. Therefore,
mutations in many of these tool-kit genes may cause congenital diseases involving
morphological abnormalities. This link between genes and abnormal morphological
phenotypes underscores the importance of understanding how cells behave and contribute
to morphogenesis as a result of gene function. Recent improvements in live imaging
and in quantitative analyses of cellular dynamics will advance our understanding
of the cellular pathogenesis of congenital diseases associated with aberrant morphologies.
In these studies, it is critical to select an appropriate model organism for the
particular phenomenon of interest.
acknowledgement: The authors thank all the members of the Division of Morphogenesis,
National Institute for Basic Biology, for their contributions to the research, their
encouragement, and helpful discussions, particularly Dr M. Suzuki for his critical
reading of the manuscript. We also thank the Model Animal Research and Spectrography
and Bioimaging Facilities, NIBB Core Research Facilities, for technical support.
M.H. was supported by a research fellowship from the Japan Society for the Promotion
of Science (JSPS). Our work introduced in this review was supported by a Grant-in-Aid
for Scientific Research on Innovative Areas from the Ministry of Education, Culture,
Sports, Science, and Technology (MEXT), Japan, to N.U.
article_processing_charge: No
article_type: original
author:
- first_name: Masakazu
full_name: Hashimoto, Masakazu
last_name: Hashimoto
- first_name: Hitoshi
full_name: Morita, Hitoshi
id: 4C6E54C6-F248-11E8-B48F-1D18A9856A87
last_name: Morita
- first_name: Naoto
full_name: Ueno, Naoto
last_name: Ueno
citation:
ama: Hashimoto M, Morita H, Ueno N. Molecular and cellular mechanisms of development
underlying congenital diseases. Congenital Anomalies. 2014;54(1):1-7. doi:10.1111/cga.12039
apa: Hashimoto, M., Morita, H., & Ueno, N. (2014). Molecular and cellular mechanisms
of development underlying congenital diseases. Congenital Anomalies. Wiley.
https://doi.org/10.1111/cga.12039
chicago: Hashimoto, Masakazu, Hitoshi Morita, and Naoto Ueno. “Molecular and Cellular
Mechanisms of Development Underlying Congenital Diseases.” Congenital Anomalies.
Wiley, 2014. https://doi.org/10.1111/cga.12039.
ieee: M. Hashimoto, H. Morita, and N. Ueno, “Molecular and cellular mechanisms of
development underlying congenital diseases,” Congenital Anomalies, vol.
54, no. 1. Wiley, pp. 1–7, 2014.
ista: Hashimoto M, Morita H, Ueno N. 2014. Molecular and cellular mechanisms of
development underlying congenital diseases. Congenital Anomalies. 54(1), 1–7.
mla: Hashimoto, Masakazu, et al. “Molecular and Cellular Mechanisms of Development
Underlying Congenital Diseases.” Congenital Anomalies, vol. 54, no. 1,
Wiley, 2014, pp. 1–7, doi:10.1111/cga.12039.
short: M. Hashimoto, H. Morita, N. Ueno, Congenital Anomalies 54 (2014) 1–7.
date_created: 2022-03-04T08:17:25Z
date_published: 2014-02-01T00:00:00Z
date_updated: 2022-03-04T08:26:05Z
day: '01'
department:
- _id: CaHe
doi: 10.1111/cga.12039
external_id:
pmid:
- '24666178'
intvolume: ' 54'
issue: '1'
keyword:
- Developmental Biology
- Embryology
- General Medicine
- Pediatrics
- Perinatology
- and Child Health
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1111/cga.12039
month: '02'
oa: 1
oa_version: None
page: 1-7
pmid: 1
publication: Congenital Anomalies
publication_identifier:
issn:
- 0914-3505
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Molecular and cellular mechanisms of development underlying congenital diseases
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 54
year: '2014'
...
---
_id: '1891'
abstract:
- lang: eng
text: We provide theoretical tests of a novel experimental technique to determine
mechanostability of proteins based on stretching a mechanically protected protein
by single-molecule force spectroscopy. This technique involves stretching a homogeneous
or heterogeneous chain of reference proteins (single-molecule markers) in which
one of them acts as host to the guest protein under study. The guest protein is
grafted into the host through genetic engineering. It is expected that unraveling
of the host precedes the unraveling of the guest removing ambiguities in the reading
of the force-extension patterns of the guest protein. We study examples of such
systems within a coarse-grained structure-based model. We consider systems with
various ratios of mechanostability for the host and guest molecules and compare
them to experimental results involving cohesin I as the guest molecule. For a
comparison, we also study the force-displacement patterns in proteins that are
linked in a serial fashion. We find that the mechanostability of the guest is
similar to that of the isolated or serially linked protein. We also demonstrate
that the ideal configuration of this strategy would be one in which the host is
much more mechanostable than the single-molecule markers. We finally show that
it is troublesome to use the highly stable cystine knot proteins as a host to
graft a guest in stretching studies because this would involve a cleaving procedure.
acknowledgement: Grant Nr. 2011/01/N/ST3/02475
author:
- first_name: Mateusz
full_name: Chwastyk, Mateusz
last_name: Chwastyk
- first_name: Albert
full_name: Galera Prat, Albert
last_name: Galera Prat
- first_name: Mateusz K
full_name: Sikora, Mateusz K
id: 2F74BCDE-F248-11E8-B48F-1D18A9856A87
last_name: Sikora
- first_name: Àngel
full_name: Gómez Sicilia, Àngel
last_name: Gómez Sicilia
- first_name: Mariano
full_name: Carrión Vázquez, Mariano
last_name: Carrión Vázquez
- first_name: Marek
full_name: Cieplak, Marek
last_name: Cieplak
citation:
ama: 'Chwastyk M, Galera Prat A, Sikora MK, Gómez Sicilia À, Carrión Vázquez M,
Cieplak M. Theoretical tests of the mechanical protection strategy in protein
nanomechanics. Proteins: Structure, Function and Bioinformatics. 2014;82(5):717-726.
doi:10.1002/prot.24436'
apa: 'Chwastyk, M., Galera Prat, A., Sikora, M. K., Gómez Sicilia, À., Carrión Vázquez,
M., & Cieplak, M. (2014). Theoretical tests of the mechanical protection strategy
in protein nanomechanics. Proteins: Structure, Function and Bioinformatics.
Wiley-Blackwell. https://doi.org/10.1002/prot.24436'
chicago: 'Chwastyk, Mateusz, Albert Galera Prat, Mateusz K Sikora, Àngel Gómez Sicilia,
Mariano Carrión Vázquez, and Marek Cieplak. “Theoretical Tests of the Mechanical
Protection Strategy in Protein Nanomechanics.” Proteins: Structure, Function
and Bioinformatics. Wiley-Blackwell, 2014. https://doi.org/10.1002/prot.24436.'
ieee: 'M. Chwastyk, A. Galera Prat, M. K. Sikora, À. Gómez Sicilia, M. Carrión Vázquez,
and M. Cieplak, “Theoretical tests of the mechanical protection strategy in protein
nanomechanics,” Proteins: Structure, Function and Bioinformatics, vol.
82, no. 5. Wiley-Blackwell, pp. 717–726, 2014.'
ista: 'Chwastyk M, Galera Prat A, Sikora MK, Gómez Sicilia À, Carrión Vázquez M,
Cieplak M. 2014. Theoretical tests of the mechanical protection strategy in protein
nanomechanics. Proteins: Structure, Function and Bioinformatics. 82(5), 717–726.'
mla: 'Chwastyk, Mateusz, et al. “Theoretical Tests of the Mechanical Protection
Strategy in Protein Nanomechanics.” Proteins: Structure, Function and Bioinformatics,
vol. 82, no. 5, Wiley-Blackwell, 2014, pp. 717–26, doi:10.1002/prot.24436.'
short: 'M. Chwastyk, A. Galera Prat, M.K. Sikora, À. Gómez Sicilia, M. Carrión Vázquez,
M. Cieplak, Proteins: Structure, Function and Bioinformatics 82 (2014) 717–726.'
date_created: 2018-12-11T11:54:34Z
date_published: 2014-05-01T00:00:00Z
date_updated: 2021-01-12T06:53:52Z
day: '01'
department:
- _id: CaHe
doi: 10.1002/prot.24436
intvolume: ' 82'
issue: '5'
language:
- iso: eng
month: '05'
oa_version: None
page: 717 - 726
publication: 'Proteins: Structure, Function and Bioinformatics'
publication_status: published
publisher: Wiley-Blackwell
publist_id: '5204'
scopus_import: 1
status: public
title: Theoretical tests of the mechanical protection strategy in protein nanomechanics
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 82
year: '2014'
...
---
_id: '1900'
abstract:
- lang: eng
text: Epithelial cell layers need to be tightly regulated to maintain their integrity
and correct function. Cell integration into epithelial sheets is now shown to
depend on the N-WASP-regulated stabilization of cortical F-actin, which generates
distinct patterns of apical-lateral contractility at E-cadherin-based cell-cell
junctions.
author:
- first_name: Martin
full_name: Behrndt, Martin
id: 3ECECA3A-F248-11E8-B48F-1D18A9856A87
last_name: Behrndt
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
citation:
ama: Behrndt M, Heisenberg C-PJ. Lateral junction dynamics lead the way out. Nature
Cell Biology. 2014;16(2):127-129. doi:10.1038/ncb2913
apa: Behrndt, M., & Heisenberg, C.-P. J. (2014). Lateral junction dynamics lead
the way out. Nature Cell Biology. Nature Publishing Group. https://doi.org/10.1038/ncb2913
chicago: Behrndt, Martin, and Carl-Philipp J Heisenberg. “Lateral Junction Dynamics
Lead the Way Out.” Nature Cell Biology. Nature Publishing Group, 2014.
https://doi.org/10.1038/ncb2913.
ieee: M. Behrndt and C.-P. J. Heisenberg, “Lateral junction dynamics lead the way
out,” Nature Cell Biology, vol. 16, no. 2. Nature Publishing Group, pp.
127–129, 2014.
ista: Behrndt M, Heisenberg C-PJ. 2014. Lateral junction dynamics lead the way out.
Nature Cell Biology. 16(2), 127–129.
mla: Behrndt, Martin, and Carl-Philipp J. Heisenberg. “Lateral Junction Dynamics
Lead the Way Out.” Nature Cell Biology, vol. 16, no. 2, Nature Publishing
Group, 2014, pp. 127–29, doi:10.1038/ncb2913.
short: M. Behrndt, C.-P.J. Heisenberg, Nature Cell Biology 16 (2014) 127–129.
date_created: 2018-12-11T11:54:37Z
date_published: 2014-01-31T00:00:00Z
date_updated: 2021-01-12T06:53:56Z
day: '31'
department:
- _id: CaHe
doi: 10.1038/ncb2913
intvolume: ' 16'
issue: '2'
language:
- iso: eng
month: '01'
oa_version: None
page: 127 - 129
publication: Nature Cell Biology
publication_status: published
publisher: Nature Publishing Group
publist_id: '5195'
quality_controlled: '1'
scopus_import: 1
status: public
title: Lateral junction dynamics lead the way out
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2014'
...
---
_id: '1925'
abstract:
- lang: eng
text: In the past decade carbon nanotubes (CNTs) have been widely studied as a potential
drug-delivery system, especially with functionality for cellular targeting. Yet,
little is known about the actual process of docking to cell receptors and transport
dynamics after internalization. Here we performed single-particle studies of folic
acid (FA) mediated CNT binding to human carcinoma cells and their transport inside
the cytosol. In particular, we employed molecular recognition force spectroscopy,
an atomic force microscopy based method, to visualize and quantify docking of
FA functionalized CNTs to FA binding receptors in terms of binding probability
and binding force. We then traced individual fluorescently labeled, FA functionalized
CNTs after specific uptake, and created a dynamic 'roadmap' that clearly showed
trajectories of directed diffusion and areas of nanotube confinement in the cytosol.
Our results demonstrate the potential of a single-molecule approach for investigation
of drug-delivery vehicles and their targeting capacity.
acknowledgement: "This work was supported by EC grant Marie Curie RTN-CT-2006-035616,
CARBIO 'Carbon nanotubes for biomedical applications' and Austrian FFG grant mnt-era.net
823980, 'IntelliTip'.\r\n"
article_number: '125704'
article_processing_charge: No
article_type: original
author:
- first_name: Constanze
full_name: Lamprecht, Constanze
last_name: Lamprecht
- first_name: Birgit
full_name: Plochberger, Birgit
last_name: Plochberger
- first_name: Verena
full_name: Ruprecht, Verena
id: 4D71A03A-F248-11E8-B48F-1D18A9856A87
last_name: Ruprecht
orcid: 0000-0003-4088-8633
- first_name: Stefan
full_name: Wieser, Stefan
id: 355AA5A0-F248-11E8-B48F-1D18A9856A87
last_name: Wieser
orcid: 0000-0002-2670-2217
- first_name: Christian
full_name: Rankl, Christian
last_name: Rankl
- first_name: Elena
full_name: Heister, Elena
last_name: Heister
- first_name: Barbara
full_name: Unterauer, Barbara
last_name: Unterauer
- first_name: Mario
full_name: Brameshuber, Mario
last_name: Brameshuber
- first_name: Jürgen
full_name: Danzberger, Jürgen
last_name: Danzberger
- first_name: Petar
full_name: Lukanov, Petar
last_name: Lukanov
- first_name: Emmanuel
full_name: Flahaut, Emmanuel
last_name: Flahaut
- first_name: Gerhard
full_name: Schütz, Gerhard
last_name: Schütz
- first_name: Peter
full_name: Hinterdorfer, Peter
last_name: Hinterdorfer
- first_name: Andreas
full_name: Ebner, Andreas
last_name: Ebner
citation:
ama: Lamprecht C, Plochberger B, Ruprecht V, et al. A single-molecule approach to
explore binding uptake and transport of cancer cell targeting nanotubes. Nanotechnology.
2014;25(12). doi:10.1088/0957-4484/25/12/125704
apa: Lamprecht, C., Plochberger, B., Ruprecht, V., Wieser, S., Rankl, C., Heister,
E., … Ebner, A. (2014). A single-molecule approach to explore binding uptake and
transport of cancer cell targeting nanotubes. Nanotechnology. IOP Publishing.
https://doi.org/10.1088/0957-4484/25/12/125704
chicago: Lamprecht, Constanze, Birgit Plochberger, Verena Ruprecht, Stefan Wieser,
Christian Rankl, Elena Heister, Barbara Unterauer, et al. “A Single-Molecule Approach
to Explore Binding Uptake and Transport of Cancer Cell Targeting Nanotubes.” Nanotechnology.
IOP Publishing, 2014. https://doi.org/10.1088/0957-4484/25/12/125704.
ieee: C. Lamprecht et al., “A single-molecule approach to explore binding
uptake and transport of cancer cell targeting nanotubes,” Nanotechnology,
vol. 25, no. 12. IOP Publishing, 2014.
ista: Lamprecht C, Plochberger B, Ruprecht V, Wieser S, Rankl C, Heister E, Unterauer
B, Brameshuber M, Danzberger J, Lukanov P, Flahaut E, Schütz G, Hinterdorfer P,
Ebner A. 2014. A single-molecule approach to explore binding uptake and transport
of cancer cell targeting nanotubes. Nanotechnology. 25(12), 125704.
mla: Lamprecht, Constanze, et al. “A Single-Molecule Approach to Explore Binding
Uptake and Transport of Cancer Cell Targeting Nanotubes.” Nanotechnology,
vol. 25, no. 12, 125704, IOP Publishing, 2014, doi:10.1088/0957-4484/25/12/125704.
short: C. Lamprecht, B. Plochberger, V. Ruprecht, S. Wieser, C. Rankl, E. Heister,
B. Unterauer, M. Brameshuber, J. Danzberger, P. Lukanov, E. Flahaut, G. Schütz,
P. Hinterdorfer, A. Ebner, Nanotechnology 25 (2014).
date_created: 2018-12-11T11:54:45Z
date_published: 2014-03-28T00:00:00Z
date_updated: 2021-01-12T06:54:07Z
day: '28'
ddc:
- '570'
department:
- _id: CaHe
- _id: MiSi
doi: 10.1088/0957-4484/25/12/125704
file:
- access_level: open_access
checksum: df4e03d225a19179e7790f6d87a12332
content_type: application/pdf
creator: dernst
date_created: 2020-05-15T09:21:19Z
date_updated: 2020-07-14T12:45:21Z
file_id: '7856'
file_name: 2014_Nanotechnology_Lamprecht.pdf
file_size: 3804152
relation: main_file
file_date_updated: 2020-07-14T12:45:21Z
has_accepted_license: '1'
intvolume: ' 25'
issue: '12'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Submitted Version
publication: Nanotechnology
publication_status: published
publisher: IOP Publishing
publist_id: '5169'
scopus_import: 1
status: public
title: A single-molecule approach to explore binding uptake and transport of cancer
cell targeting nanotubes
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 25
year: '2014'
...
---
_id: '1923'
abstract:
- lang: eng
text: We derive the equations for a thin, axisymmetric elastic shell subjected to
an internal active stress giving rise to active tension and moments within the
shell. We discuss the stability of a cylindrical elastic shell and its response
to a localized change in internal active stress. This description is relevant
to describe the cellular actomyosin cortex, a thin shell at the cell surface behaving
elastically at a short timescale and subjected to active internal forces arising
from myosin molecular motor activity. We show that the recent observations of
cell deformation following detachment of adherent cells (Maître J-L et al 2012
Science 338 253-6) are well accounted for by this mechanical description. The
actin cortex elastic and bending moduli can be obtained from a quantitative analysis
of cell shapes observed in these experiments. Our approach thus provides a non-invasive,
imaging-based method for the extraction of cellular physical parameters.
article_number: '065005'
author:
- first_name: Hélène
full_name: Berthoumieux, Hélène
last_name: Berthoumieux
- first_name: Jean-Léon
full_name: Maître, Jean-Léon
id: 48F1E0D8-F248-11E8-B48F-1D18A9856A87
last_name: Maître
orcid: 0000-0002-3688-1474
- first_name: Carl-Philipp J
full_name: Heisenberg, Carl-Philipp J
id: 39427864-F248-11E8-B48F-1D18A9856A87
last_name: Heisenberg
orcid: 0000-0002-0912-4566
- first_name: Ewa
full_name: Paluch, Ewa
last_name: Paluch
- first_name: Frank
full_name: Julicher, Frank
last_name: Julicher
- first_name: Guillaume
full_name: Salbreux, Guillaume
last_name: Salbreux
citation:
ama: Berthoumieux H, Maître J-L, Heisenberg C-PJ, Paluch E, Julicher F, Salbreux
G. Active elastic thin shell theory for cellular deformations. New Journal
of Physics. 2014;16. doi:10.1088/1367-2630/16/6/065005
apa: Berthoumieux, H., Maître, J.-L., Heisenberg, C.-P. J., Paluch, E., Julicher,
F., & Salbreux, G. (2014). Active elastic thin shell theory for cellular deformations.
New Journal of Physics. IOP Publishing Ltd. https://doi.org/10.1088/1367-2630/16/6/065005
chicago: Berthoumieux, Hélène, Jean-Léon Maître, Carl-Philipp J Heisenberg, Ewa
Paluch, Frank Julicher, and Guillaume Salbreux. “Active Elastic Thin Shell Theory
for Cellular Deformations.” New Journal of Physics. IOP Publishing Ltd.,
2014. https://doi.org/10.1088/1367-2630/16/6/065005.
ieee: H. Berthoumieux, J.-L. Maître, C.-P. J. Heisenberg, E. Paluch, F. Julicher,
and G. Salbreux, “Active elastic thin shell theory for cellular deformations,”
New Journal of Physics, vol. 16. IOP Publishing Ltd., 2014.
ista: Berthoumieux H, Maître J-L, Heisenberg C-PJ, Paluch E, Julicher F, Salbreux
G. 2014. Active elastic thin shell theory for cellular deformations. New Journal
of Physics. 16, 065005.
mla: Berthoumieux, Hélène, et al. “Active Elastic Thin Shell Theory for Cellular
Deformations.” New Journal of Physics, vol. 16, 065005, IOP Publishing
Ltd., 2014, doi:10.1088/1367-2630/16/6/065005.
short: H. Berthoumieux, J.-L. Maître, C.-P.J. Heisenberg, E. Paluch, F. Julicher,
G. Salbreux, New Journal of Physics 16 (2014).
date_created: 2018-12-11T11:54:44Z
date_published: 2014-06-01T00:00:00Z
date_updated: 2021-01-12T06:54:06Z
day: '01'
ddc:
- '570'
department:
- _id: CaHe
doi: 10.1088/1367-2630/16/6/065005
file:
- access_level: open_access
checksum: 8dbe81ec656bf1264d8889bda9b2b985
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:16:16Z
date_updated: 2020-07-14T12:45:21Z
file_id: '5202'
file_name: IST-2016-429-v1+1_document.pdf
file_size: 941387
relation: main_file
file_date_updated: 2020-07-14T12:45:21Z
has_accepted_license: '1'
intvolume: ' 16'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
publication: New Journal of Physics
publication_status: published
publisher: IOP Publishing Ltd.
publist_id: '5171'
pubrep_id: '429'
quality_controlled: '1'
scopus_import: 1
status: public
title: Active elastic thin shell theory for cellular deformations
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2014'
...
---
_id: '2248'
abstract:
- lang: eng
text: 'Avian forelimb digit homology remains one of the standard themes in comparative
biology and EvoDevo research. In order to resolve the apparent contradictions
between embryological and paleontological evidence a variety of hypotheses have
been presented in recent years. The proposals range from excluding birds from
the dinosaur clade, to assignments of homology by different criteria, or even
assuming a hexadactyl tetrapod limb ground state. At present two approaches prevail:
the frame shift hypothesis and the pyramid reduction hypothesis. While the former
postulates a homeotic shift of digit identities, the latter argues for a gradual
bilateral reduction of phalanges and digits. Here we present a new model that
integrates elements from both hypotheses with the existing experimental and fossil
evidence. We start from the main feature common to both earlier concepts, the
initiating ontogenetic event: reduction and loss of the anterior-most digit. It
is proposed that a concerted mechanism of molecular regulation and developmental
mechanics is capable of shifting the boundaries of hoxD expression in embryonic
forelimb buds as well as changing the digit phenotypes. Based on a distinction
between positional (topological) and compositional (phenotypic) homology criteria,
we argue that the identity of the avian digits is II, III, IV, despite a partially
altered phenotype. Finally, we introduce an alternative digit reduction scheme
that reconciles the current fossil evidence with the presented molecular-morphogenetic
model. Our approach identifies specific experiments that allow to test whether
gene expression can be shifted and digit phenotypes can be altered by induced
digit loss or digit gain.'
author:
- first_name: Daniel
full_name: Capek, Daniel
id: 31C42484-F248-11E8-B48F-1D18A9856A87
last_name: Capek
orcid: 0000-0001-5199-9940
- first_name: Brian
full_name: Metscher, Brian
last_name: Metscher
- first_name: Gerd
full_name: Müller, Gerd
last_name: Müller
citation:
ama: 'Capek D, Metscher B, Müller G. Thumbs down: A molecular-morphogenetic approach
to avian digit homology. Journal of Experimental Zoology Part B: Molecular
and Developmental Evolution. 2014;322(1):1-12. doi:10.1002/jez.b.22545'
apa: 'Capek, D., Metscher, B., & Müller, G. (2014). Thumbs down: A molecular-morphogenetic
approach to avian digit homology. Journal of Experimental Zoology Part B: Molecular
and Developmental Evolution. Wiley-Blackwell. https://doi.org/10.1002/jez.b.22545'
chicago: 'Capek, Daniel, Brian Metscher, and Gerd Müller. “Thumbs down: A Molecular-Morphogenetic
Approach to Avian Digit Homology.” Journal of Experimental Zoology Part B:
Molecular and Developmental Evolution. Wiley-Blackwell, 2014. https://doi.org/10.1002/jez.b.22545.'
ieee: 'D. Capek, B. Metscher, and G. Müller, “Thumbs down: A molecular-morphogenetic
approach to avian digit homology,” Journal of Experimental Zoology Part B:
Molecular and Developmental Evolution, vol. 322, no. 1. Wiley-Blackwell, pp.
1–12, 2014.'
ista: 'Capek D, Metscher B, Müller G. 2014. Thumbs down: A molecular-morphogenetic
approach to avian digit homology. Journal of Experimental Zoology Part B: Molecular
and Developmental Evolution. 322(1), 1–12.'
mla: 'Capek, Daniel, et al. “Thumbs down: A Molecular-Morphogenetic Approach to
Avian Digit Homology.” Journal of Experimental Zoology Part B: Molecular and
Developmental Evolution, vol. 322, no. 1, Wiley-Blackwell, 2014, pp. 1–12,
doi:10.1002/jez.b.22545.'
short: 'D. Capek, B. Metscher, G. Müller, Journal of Experimental Zoology Part B:
Molecular and Developmental Evolution 322 (2014) 1–12.'
date_created: 2018-12-11T11:56:33Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2021-01-12T06:56:16Z
day: '01'
department:
- _id: CaHe
doi: 10.1002/jez.b.22545
intvolume: ' 322'
issue: '1'
language:
- iso: eng
month: '01'
oa_version: None
page: 1 - 12
publication: 'Journal of Experimental Zoology Part B: Molecular and Developmental
Evolution'
publication_identifier:
issn:
- '15525007'
publication_status: published
publisher: Wiley-Blackwell
publist_id: '4701'
quality_controlled: '1'
scopus_import: 1
status: public
title: 'Thumbs down: A molecular-morphogenetic approach to avian digit homology'
type: journal_article
user_id: 4435EBFC-F248-11E8-B48F-1D18A9856A87
volume: 322
year: '2014'
...