---
_id: '9805'
abstract:
- lang: eng
text: The spread of adaptive alleles is fundamental to evolution, and in theory,
this process is well‐understood. However, only rarely can we follow this process—whether
it originates from the spread of a new mutation, or by introgression from another
population. In this issue of Molecular Ecology, Hanemaaijer et al. (2018) report
on a 25‐year long study of the mosquitoes Anopheles gambiae (Figure 1) and Anopheles
coluzzi in Mali, based on genotypes at 15 single‐nucleotide polymorphism (SNP).
The species are usually reproductively isolated from each other, but in 2002 and
2006, bursts of hybridization were observed, when F1 hybrids became abundant.
Alleles backcrossed from A. gambiae into A. coluzzi, but after the first event,
these declined over the following years. In contrast, after 2006, an insecticide
resistance allele that had established in A. gambiae spread into A. coluzzi, and
rose to high frequency there, over 6 years (~75 generations). Whole genome sequences
of 74 individuals showed that A. gambiae SNP from across the genome had become
common in the A. coluzzi population, but that most of these were clustered in
34 genes around the resistance locus. A new set of SNP from 25 of these genes
were assayed over time; over the 4 years since near‐fixation of the resistance
allele; some remained common, whereas others declined. What do these patterns
tell us about this introgression event?
article_processing_charge: No
author:
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: 'Barton NH. Data from: The consequences of an introgression event. 2019. doi:10.5061/dryad.2kb6fh4'
apa: 'Barton, N. H. (2019). Data from: The consequences of an introgression event.
Dryad. https://doi.org/10.5061/dryad.2kb6fh4'
chicago: 'Barton, Nicholas H. “Data from: The Consequences of an Introgression Event.”
Dryad, 2019. https://doi.org/10.5061/dryad.2kb6fh4.'
ieee: 'N. H. Barton, “Data from: The consequences of an introgression event.” Dryad,
2019.'
ista: 'Barton NH. 2019. Data from: The consequences of an introgression event, Dryad,
10.5061/dryad.2kb6fh4.'
mla: 'Barton, Nicholas H. Data from: The Consequences of an Introgression Event.
Dryad, 2019, doi:10.5061/dryad.2kb6fh4.'
short: N.H. Barton, (2019).
date_created: 2021-08-06T12:03:50Z
date_published: 2019-01-09T00:00:00Z
date_updated: 2023-09-19T10:06:07Z
day: '09'
department:
- _id: NiBa
doi: 10.5061/dryad.2kb6fh4
main_file_link:
- open_access: '1'
url: https://doi.org/10.5061/dryad.2kb6fh4
month: '01'
oa: 1
oa_version: Published Version
publisher: Dryad
related_material:
record:
- id: '40'
relation: used_in_publication
status: public
status: public
title: 'Data from: The consequences of an introgression event'
type: research_data_reference
user_id: 6785fbc1-c503-11eb-8a32-93094b40e1cf
year: '2019'
...
---
_id: '6071'
abstract:
- lang: eng
text: 'Transcription factors, by binding to specific sequences on the DNA, control
the precise spatio-temporal expression of genes inside a cell. However, this specificity
is limited, leading to frequent incorrect binding of transcription factors that
might have deleterious consequences on the cell. By constructing a biophysical
model of TF-DNA binding in the context of gene regulation, I will first explore
how regulatory constraints can strongly shape the distribution of a population
in sequence space. Then, by directly linking this to a picture of multiple types
of transcription factors performing their functions simultaneously inside the
cell, I will explore the extent of regulatory crosstalk -- incorrect binding interactions
between transcription factors and binding sites that lead to erroneous regulatory
states -- and understand the constraints this places on the design of regulatory
systems. I will then develop a generic theoretical framework to investigate the
coevolution of multiple transcription factors and multiple binding sites, in the
context of a gene regulatory network that performs a certain function. As a particular
tractable version of this problem, I will consider the evolution of two transcription
factors when they transmit upstream signals to downstream target genes. Specifically,
I will describe the evolutionary steady states and the evolutionary pathways involved,
along with their timescales, of a system that initially undergoes a transcription
factor duplication event. To connect this important theoretical model to the prominent
biological event of transcription factor duplication giving rise to paralogous
families, I will then describe a bioinformatics analysis of C2H2 Zn-finger transcription
factors, a major family in humans, and focus on the patterns of evolution that
paralogs have undergone in their various protein domains in the recent past. '
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Roshan
full_name: Prizak, Roshan
id: 4456104E-F248-11E8-B48F-1D18A9856A87
last_name: Prizak
citation:
ama: Prizak R. Coevolution of transcription factors and their binding sites in sequence
space. 2019. doi:10.15479/at:ista:th6071
apa: Prizak, R. (2019). Coevolution of transcription factors and their binding
sites in sequence space. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:th6071
chicago: Prizak, Roshan. “Coevolution of Transcription Factors and Their Binding
Sites in Sequence Space.” Institute of Science and Technology Austria, 2019. https://doi.org/10.15479/at:ista:th6071.
ieee: R. Prizak, “Coevolution of transcription factors and their binding sites in
sequence space,” Institute of Science and Technology Austria, 2019.
ista: Prizak R. 2019. Coevolution of transcription factors and their binding sites
in sequence space. Institute of Science and Technology Austria.
mla: Prizak, Roshan. Coevolution of Transcription Factors and Their Binding Sites
in Sequence Space. Institute of Science and Technology Austria, 2019, doi:10.15479/at:ista:th6071.
short: R. Prizak, Coevolution of Transcription Factors and Their Binding Sites in
Sequence Space, Institute of Science and Technology Austria, 2019.
date_created: 2019-03-06T16:16:10Z
date_published: 2019-03-11T00:00:00Z
date_updated: 2023-09-22T10:00:48Z
day: '11'
ddc:
- '576'
degree_awarded: PhD
department:
- _id: GaTk
- _id: NiBa
doi: 10.15479/at:ista:th6071
file:
- access_level: open_access
checksum: e60a72de35d270b31f1a23d50f224ec0
content_type: application/pdf
creator: rprizak
date_created: 2019-03-06T16:05:07Z
date_updated: 2020-07-14T12:47:18Z
file_id: '6072'
file_name: Thesis_final_PDFA_RoshanPrizak.pdf
file_size: 20995465
relation: main_file
- access_level: closed
checksum: 67c2630333d05ebafef5f018863a8465
content_type: application/zip
creator: rprizak
date_created: 2019-03-06T16:09:39Z
date_updated: 2020-07-14T12:47:18Z
file_id: '6073'
file_name: thesis_v2_merge.zip
file_size: 85705272
relation: source_file
title: Latex files
file_date_updated: 2020-07-14T12:47:18Z
has_accepted_license: '1'
language:
- iso: eng
month: '03'
oa: 1
oa_version: Published Version
page: '189'
project:
- _id: 254E9036-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P28844-B27
name: Biophysics of information processing in gene regulation
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '1358'
relation: part_of_dissertation
status: public
- id: '955'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Gašper
full_name: Tkačik, Gašper
id: 3D494DCA-F248-11E8-B48F-1D18A9856A87
last_name: Tkačik
orcid: 0000-0002-6699-1455
title: Coevolution of transcription factors and their binding sites in sequence space
type: dissertation
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
year: '2019'
...
---
_id: '6856'
abstract:
- lang: eng
text: 'Plant mating systems play a key role in structuring genetic variation both
within and between species. In hybrid zones, the outcomes and dynamics of hybridization
are usually interpreted as the balance between gene flow and selection against
hybrids. Yet, mating systems can introduce selective forces that alter these expectations;
with diverse outcomes for the level and direction of gene flow depending on variation
in outcrossing and whether the mating systems of the species pair are the same
or divergent. We present a survey of hybridization in 133 species pairs from 41
plant families and examine how patterns of hybridization vary with mating system.
We examine if hybrid zone mode, level of gene flow, asymmetries in gene flow and
the frequency of reproductive isolating barriers vary in relation to mating system/s
of the species pair. We combine these results with a simulation model and examples
from the literature to address two general themes: (i) the two‐way interaction
between introgression and the evolution of reproductive systems, and (ii) how
mating system can facilitate or restrict interspecific gene flow. We conclude
that examining mating system with hybridization provides unique opportunities
to understand divergence and the processes underlying reproductive isolation.'
article_processing_charge: No
article_type: original
author:
- first_name: Melinda
full_name: Pickup, Melinda
id: 2C78037E-F248-11E8-B48F-1D18A9856A87
last_name: Pickup
orcid: 0000-0001-6118-0541
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Yaniv
full_name: Brandvain, Yaniv
last_name: Brandvain
- first_name: Christelle
full_name: Fraisse, Christelle
id: 32DF5794-F248-11E8-B48F-1D18A9856A87
last_name: Fraisse
orcid: 0000-0001-8441-5075
- first_name: Sarah
full_name: Yakimowski, Sarah
last_name: Yakimowski
- first_name: Tanmay
full_name: Dixit, Tanmay
last_name: Dixit
- first_name: Christian
full_name: Lexer, Christian
last_name: Lexer
- first_name: Eva
full_name: Cereghetti, Eva
id: 71AA91B4-05ED-11EA-8BEB-F5833E63BD63
last_name: Cereghetti
- first_name: David
full_name: Field, David
id: 419049E2-F248-11E8-B48F-1D18A9856A87
last_name: Field
orcid: 0000-0002-4014-8478
citation:
ama: 'Pickup M, Barton NH, Brandvain Y, et al. Mating system variation in hybrid
zones: Facilitation, barriers and asymmetries to gene flow. New Phytologist.
2019;224(3):1035-1047. doi:10.1111/nph.16180'
apa: 'Pickup, M., Barton, N. H., Brandvain, Y., Fraisse, C., Yakimowski, S., Dixit,
T., … Field, D. (2019). Mating system variation in hybrid zones: Facilitation,
barriers and asymmetries to gene flow. New Phytologist. Wiley. https://doi.org/10.1111/nph.16180'
chicago: 'Pickup, Melinda, Nicholas H Barton, Yaniv Brandvain, Christelle Fraisse,
Sarah Yakimowski, Tanmay Dixit, Christian Lexer, Eva Cereghetti, and David Field.
“Mating System Variation in Hybrid Zones: Facilitation, Barriers and Asymmetries
to Gene Flow.” New Phytologist. Wiley, 2019. https://doi.org/10.1111/nph.16180.'
ieee: 'M. Pickup et al., “Mating system variation in hybrid zones: Facilitation,
barriers and asymmetries to gene flow,” New Phytologist, vol. 224, no.
3. Wiley, pp. 1035–1047, 2019.'
ista: 'Pickup M, Barton NH, Brandvain Y, Fraisse C, Yakimowski S, Dixit T, Lexer
C, Cereghetti E, Field D. 2019. Mating system variation in hybrid zones: Facilitation,
barriers and asymmetries to gene flow. New Phytologist. 224(3), 1035–1047.'
mla: 'Pickup, Melinda, et al. “Mating System Variation in Hybrid Zones: Facilitation,
Barriers and Asymmetries to Gene Flow.” New Phytologist, vol. 224, no.
3, Wiley, 2019, pp. 1035–47, doi:10.1111/nph.16180.'
short: M. Pickup, N.H. Barton, Y. Brandvain, C. Fraisse, S. Yakimowski, T. Dixit,
C. Lexer, E. Cereghetti, D. Field, New Phytologist 224 (2019) 1035–1047.
date_created: 2019-09-07T14:35:40Z
date_published: 2019-11-01T00:00:00Z
date_updated: 2023-10-18T08:47:08Z
day: '01'
ddc:
- '570'
department:
- _id: NiBa
doi: 10.1111/nph.16180
ec_funded: 1
external_id:
pmid:
- '31505037'
file:
- access_level: open_access
checksum: 21e4c95599bbcaf7c483b89954658672
content_type: application/pdf
creator: dernst
date_created: 2019-11-13T08:15:05Z
date_updated: 2020-07-14T12:47:42Z
file_id: '7011'
file_name: 2019_NewPhytologist_Pickup.pdf
file_size: 1511958
relation: main_file
file_date_updated: 2020-07-14T12:47:42Z
has_accepted_license: '1'
intvolume: ' 224'
issue: '3'
language:
- iso: eng
month: '11'
oa: 1
oa_version: Published Version
page: 1035-1047
pmid: 1
project:
- _id: 25B36484-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '329960'
name: Mating system and the evolutionary dynamics of hybrid zones
- _id: 2662AADE-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: M02463
name: Sex chromosomes and species barriers
publication: New Phytologist
publication_identifier:
eissn:
- 1469-8137
issn:
- 0028-646X
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Mating system variation in hybrid zones: Facilitation, barriers and asymmetries
to gene flow'
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: 224
year: '2019'
...
---
_id: '6089'
abstract:
- lang: eng
text: Pleiotropy is the well-established idea that a single mutation affects multiple
phenotypes. If a mutation has opposite effects on fitness when expressed in different
contexts, then genetic conflict arises. Pleiotropic conflict is expected to reduce
the efficacy of selection by limiting the fixation of beneficial mutations through
adaptation, and the removal of deleterious mutations through purifying selection.
Although this has been widely discussed, in particular in the context of a putative
“gender load,” it has yet to be systematically quantified. In this work, we empirically
estimate to which extent different pleiotropic regimes impede the efficacy of
selection in Drosophila melanogaster. We use whole-genome polymorphism data from
a single African population and divergence data from D. simulans to estimate the
fraction of adaptive fixations (α), the rate of adaptation (ωA), and the direction
of selection (DoS). After controlling for confounding covariates, we find that
the different pleiotropic regimes have a relatively small, but significant, effect
on selection efficacy. Specifically, our results suggest that pleiotropic sexual
antagonism may restrict the efficacy of selection, but that this conflict can
be resolved by limiting the expression of genes to the sex where they are beneficial.
Intermediate levels of pleiotropy across tissues and life stages can also lead
to maladaptation in D. melanogaster, due to inefficient purifying selection combined
with low frequency of mutations that confer a selective advantage. Thus, our study
highlights the need to consider the efficacy of selection in the context of antagonistic
pleiotropy, and of genetic conflict in general.
article_processing_charge: No
author:
- first_name: Christelle
full_name: Fraisse, Christelle
id: 32DF5794-F248-11E8-B48F-1D18A9856A87
last_name: Fraisse
orcid: 0000-0001-8441-5075
- first_name: Gemma
full_name: Puixeu Sala, Gemma
id: 33AB266C-F248-11E8-B48F-1D18A9856A87
last_name: Puixeu Sala
orcid: 0000-0001-8330-1754
- first_name: Beatriz
full_name: Vicoso, Beatriz
id: 49E1C5C6-F248-11E8-B48F-1D18A9856A87
last_name: Vicoso
orcid: 0000-0002-4579-8306
citation:
ama: Fraisse C, Puixeu Sala G, Vicoso B. Pleiotropy modulates the efficacy of selection
in drosophila melanogaster. Molecular biology and evolution. 2019;36(3):500-515.
doi:10.1093/molbev/msy246
apa: Fraisse, C., Puixeu Sala, G., & Vicoso, B. (2019). Pleiotropy modulates
the efficacy of selection in drosophila melanogaster. Molecular Biology and
Evolution. Oxford University Press. https://doi.org/10.1093/molbev/msy246
chicago: Fraisse, Christelle, Gemma Puixeu Sala, and Beatriz Vicoso. “Pleiotropy
Modulates the Efficacy of Selection in Drosophila Melanogaster.” Molecular
Biology and Evolution. Oxford University Press, 2019. https://doi.org/10.1093/molbev/msy246.
ieee: C. Fraisse, G. Puixeu Sala, and B. Vicoso, “Pleiotropy modulates the efficacy
of selection in drosophila melanogaster,” Molecular biology and evolution,
vol. 36, no. 3. Oxford University Press, pp. 500–515, 2019.
ista: Fraisse C, Puixeu Sala G, Vicoso B. 2019. Pleiotropy modulates the efficacy
of selection in drosophila melanogaster. Molecular biology and evolution. 36(3),
500–515.
mla: Fraisse, Christelle, et al. “Pleiotropy Modulates the Efficacy of Selection
in Drosophila Melanogaster.” Molecular Biology and Evolution, vol. 36,
no. 3, Oxford University Press, 2019, pp. 500–15, doi:10.1093/molbev/msy246.
short: C. Fraisse, G. Puixeu Sala, B. Vicoso, Molecular Biology and Evolution 36
(2019) 500–515.
date_created: 2019-03-10T22:59:19Z
date_published: 2019-03-01T00:00:00Z
date_updated: 2024-02-21T13:59:17Z
day: '01'
department:
- _id: BeVi
- _id: NiBa
doi: 10.1093/molbev/msy246
external_id:
isi:
- '000462585100006'
pmid:
- '30590559'
intvolume: ' 36'
isi: 1
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ncbi.nlm.nih.gov/pubmed/30590559
month: '03'
oa: 1
oa_version: Submitted Version
page: 500-515
pmid: 1
project:
- _id: 250ED89C-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P28842-B22
name: Sex chromosome evolution under male- and female- heterogamety
publication: Molecular biology and evolution
publication_identifier:
eissn:
- 1537-1719
issn:
- 0737-4038
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
related_material:
record:
- id: '5757'
relation: popular_science
status: public
scopus_import: '1'
status: public
title: Pleiotropy modulates the efficacy of selection in drosophila melanogaster
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 36
year: '2019'
...
---
_id: '6090'
abstract:
- lang: eng
text: Cells need to reliably sense external ligand concentrations to achieve various
biological functions such as chemotaxis or signaling. The molecular recognition
of ligands by surface receptors is degenerate in many systems, leading to crosstalk
between ligand-receptor pairs. Crosstalk is often thought of as a deviation from
optimal specific recognition, as the binding of noncognate ligands can interfere
with the detection of the receptor's cognate ligand, possibly leading to a false
triggering of a downstream signaling pathway. Here we quantify the optimal precision
of sensing the concentrations of multiple ligands by a collection of promiscuous
receptors. We demonstrate that crosstalk can improve precision in concentration
sensing and discrimination tasks. To achieve superior precision, the additional
information about ligand concentrations contained in short binding events of the
noncognate ligand should be exploited. We present a proofreading scheme to realize
an approximate estimation of multiple ligand concentrations that reaches a precision
close to the derived optimal bounds. Our results help rationalize the observed
ubiquity of receptor crosstalk in molecular sensing.
article_number: '022423'
article_processing_charge: No
author:
- first_name: Martín
full_name: Carballo-Pacheco, Martín
last_name: Carballo-Pacheco
- first_name: Jonathan
full_name: Desponds, Jonathan
last_name: Desponds
- first_name: Tatyana
full_name: Gavrilchenko, Tatyana
last_name: Gavrilchenko
- first_name: Andreas
full_name: Mayer, Andreas
last_name: Mayer
- first_name: Roshan
full_name: Prizak, Roshan
id: 4456104E-F248-11E8-B48F-1D18A9856A87
last_name: Prizak
- first_name: Gautam
full_name: Reddy, Gautam
last_name: Reddy
- first_name: Ilya
full_name: Nemenman, Ilya
last_name: Nemenman
- first_name: Thierry
full_name: Mora, Thierry
last_name: Mora
citation:
ama: Carballo-Pacheco M, Desponds J, Gavrilchenko T, et al. Receptor crosstalk improves
concentration sensing of multiple ligands. Physical Review E. 2019;99(2).
doi:10.1103/PhysRevE.99.022423
apa: Carballo-Pacheco, M., Desponds, J., Gavrilchenko, T., Mayer, A., Prizak, R.,
Reddy, G., … Mora, T. (2019). Receptor crosstalk improves concentration sensing
of multiple ligands. Physical Review E. American Physical Society. https://doi.org/10.1103/PhysRevE.99.022423
chicago: Carballo-Pacheco, Martín, Jonathan Desponds, Tatyana Gavrilchenko, Andreas
Mayer, Roshan Prizak, Gautam Reddy, Ilya Nemenman, and Thierry Mora. “Receptor
Crosstalk Improves Concentration Sensing of Multiple Ligands.” Physical Review
E. American Physical Society, 2019. https://doi.org/10.1103/PhysRevE.99.022423.
ieee: M. Carballo-Pacheco et al., “Receptor crosstalk improves concentration
sensing of multiple ligands,” Physical Review E, vol. 99, no. 2. American
Physical Society, 2019.
ista: Carballo-Pacheco M, Desponds J, Gavrilchenko T, Mayer A, Prizak R, Reddy G,
Nemenman I, Mora T. 2019. Receptor crosstalk improves concentration sensing of
multiple ligands. Physical Review E. 99(2), 022423.
mla: Carballo-Pacheco, Martín, et al. “Receptor Crosstalk Improves Concentration
Sensing of Multiple Ligands.” Physical Review E, vol. 99, no. 2, 022423,
American Physical Society, 2019, doi:10.1103/PhysRevE.99.022423.
short: M. Carballo-Pacheco, J. Desponds, T. Gavrilchenko, A. Mayer, R. Prizak, G.
Reddy, I. Nemenman, T. Mora, Physical Review E 99 (2019).
date_created: 2019-03-10T22:59:20Z
date_published: 2019-02-26T00:00:00Z
date_updated: 2024-02-28T13:12:06Z
day: '26'
department:
- _id: NiBa
- _id: GaTk
doi: 10.1103/PhysRevE.99.022423
external_id:
isi:
- '000459916500007'
intvolume: ' 99'
isi: 1
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.biorxiv.org/content/10.1101/448118v1.abstract
month: '02'
oa: 1
oa_version: Preprint
publication: Physical Review E
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Receptor crosstalk improves concentration sensing of multiple ligands
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 99
year: '2019'
...