scholarly journals Selection in the Rapid Evolution of Gamete Recognition Proteins in Marine Invertebrates

2011 ◽  
Vol 3 (11) ◽  
pp. a002931-a002931 ◽  
Author(s):  
V. D. Vacquier ◽  
W. J. Swanson
Keyword(s):  
Marine Invertebrates ◽  
Rapid Evolution ◽  
Gamete Recognition ◽  
Gamete Recognition Proteins

scholarly journals Evolution of Gamete Recognition Proteins

1998 ◽  
Vol 281 (5385) ◽  
pp. 1995-1998 ◽  
Author(s):  
V. D. Vacquier
Keyword(s):  
Gamete Recognition ◽  
Gamete Recognition Proteins

scholarly journals Rapid Evolution of a Sexual Reproduction Gene in Centric Diatoms of the Genus Thalassiosira

2001 ◽  
Vol 67 (8) ◽  
pp. 3501-3513 ◽  
Author(s):  
E. Virginia Armbrust ◽  
H. M. Galindo
Keyword(s):  
Population Dynamics ◽  
Sexual Reproduction ◽  
Related Species ◽  
Rapid Evolution ◽  
Sequence Divergence ◽  
Thalassiosira Pseudonana ◽  
Centric Diatom ◽  
Additional Species ◽  
Gamete Recognition ◽  
The Impact

ABSTRACT Sexual reproduction is commonly assumed to occur in the vast majority of diatoms due to the intimate association of this process with cell size control. Surprisingly, however, little is known about the impact of sexual events on diatom population dynamics. TheSig1 gene is strongly upregulated during sexual reproduction in the centric diatom Thalassiosira weissflogii and has been hypothesized to encode a protein involved in gamete recognition. In the present study, degenerate PCR primers were designed and used to amplify a portion ofSig1 from three closely related species in the cosmopolitan genus Thalassiosira, Thalassiosira oceanica, Thalassiosira guillardii, andThalassiosira pseudonana. Identification ofSig1 in these three additional species facilitated development of this gene as a molecular marker for diatom sexual events. Examination of the new sequences indicated that multiple copies of Sig1 are probably present in the genome. Moreover, compared to the housekeeping geneβ -tubulin, the Sig1genes of isolates of T. weissflogii collected from different regions of the Atlantic and Pacific oceans displayed high levels of divergence. The Sig1 genes of the four closely related Thalassiosira species also displayed high levels of sequence divergence compared to the levels observed with a second gene, Fcp, probably explaining why Sig1could not be amplified from more distantly related species. The high levels of sequence divergence both within and between species suggest that Sig1 is rapidly evolving in a manner reminiscent of the manner observed in other genes that encode gamete recognition proteins. A simple model is presented for Sig1 evolution and the implications of such a rapidly evolving sexual reproduction gene for diatom speciation and population dynamics.

scholarly journals The Molecular Mechanisms of Gametic Incompatibility in Invertebrates

Acta Naturae ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 4-15 ◽  
Author(s):  
A. A. Lobov ◽  
A. L. Maltseva ◽  
N. A. Mikhailova ◽  
A. I. Granovitch
Keyword(s):  
Reproductive Isolation ◽  
Molecular Mechanisms ◽  
Model Species ◽  
Closely Related Species ◽  
Animal Evolution ◽  
Gamete Recognition ◽  
Receptor Recognition ◽  
Gamete Interactions ◽  
Species Specific ◽  
Gamete Recognition Proteins

Fertilization (gamete fusion followed by zygote formation) is a multistage process. Each stage is mediated by ligand-receptor recognition of gamete interaction molecules. This recognition includes the movement of sperm in the gradient of egg chemoattractants, destruction of the egg envelope by acrosomal proteins, etc. Gametic incompatibility is one of the mechanisms of reproductive isolation. It is based on species-specific molecular interactions that prevent heterospecific fertilization. Although gametic incompatibility may occur in any sexually reproducing organism, it has been studied only in a few model species. Gamete interactions in different taxa involve generally similar processes, but they often employ non-homologous molecules. Gamete recognition proteins evolve rapidly, like immunity proteins, and include many taxon-specific families. In fact, recently appeared proteins particularly contribute to reproductive isolation via gametic incompatibility. Thus, we can assume a multiple, independent origin of this type of reproductive isolation throughout animal evolution. Gametic incompatibility can be achieved at any fertilization stage and entails different consequences at different taxonomic levels and ranges, from complete incompatibility between closely related species to partial incompatibility between distantly related taxa.

scholarly journals Hybridization and pre-zygotic reproductive barriers in Plasmodium

2015 ◽  
Vol 282 (1806) ◽  
pp. 20143027 ◽  
Author(s):  
Ricardo S. Ramiro ◽  
Shahid M. Khan ◽  
Blandine Franke-Fayard ◽  
Chris J. Janse ◽  
Darren J. Obbard ◽  
...  
Keyword(s):  
Reproductive Isolation ◽  
Low Frequency ◽  
Surface Proteins ◽  
Reproductive Barriers ◽  
Mixed Species ◽  
Rodent Malaria ◽  
Gamete Recognition ◽  
Causative Agents ◽  
Parasite Populations ◽  
Gamete Recognition Proteins

Sexual reproduction is an obligate step in the life cycle of many parasites, including the causative agents of malaria ( Plasmodium ). Mixed-species infections are common in nature and consequently, interactions between heterospecific gametes occur. Given the importance of managing gene flow across parasite populations, remarkably little is understood about how reproductive isolation between species is maintained. We use the rodent malaria parasites P. berghei and P. yoelii to investigate the ecology of mixed-species mating groups, identify proteins involved in pre-zygotic barriers, and examine their evolution. Specifically, we show that (i) hybridization occurs, but at low frequency; (ii) hybridization reaches high levels when female gametes lack the surface proteins P230 or P48/45, demonstrating that these proteins are key for pre-zygotic reproductive isolation; (iii) asymmetric reproductive interference occurs, where the fertility of P. berghei gametes is reduced in the presence of P. yoelii and (iv) as expected for gamete recognition proteins, strong positive selection acts on a region of P230 and P47 (P48/45 paralogue). P230 and P48/45 are leading candidates for interventions to block malaria transmission. Our results suggest that depending on the viability of hybrids, applying such interventions to populations where mixed-species infections occur could either facilitate or hinder malaria control.

scholarly journals Adaptive Evolution of Gamete-Recognition Proteins in Birds

2008 ◽  
Vol 67 (5) ◽  
pp. 488-496 ◽  
Author(s):  
Sofia Berlin ◽  
Lujiang Qu ◽  
Hans Ellegren
Keyword(s):  
Adaptive Evolution ◽  
Gamete Recognition ◽  
Gamete Recognition Proteins
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