Publications des scientifiques de l'IRD

Wroblewski E. E., Guethlein L. A., Norman P. J., Li Y. Y., Shaw C. M., Han A. S., Ndjango J. B. N., Ahuka-Mundeke S., Georgiev A. V., Peeters Martine, Hahn B. H., Parham P. (2017). Bonobos maintain immune system diversity with three functional types of mhc-b. Journal of Immunology, 198 (9), p. 3480-3493. ISSN 0022-1767.

Titre du document
Bonobos maintain immune system diversity with three functional types of mhc-b
Année de publication
2017
Type de document
Article référencé dans le Web of Science WOS:000401135200016
Auteurs
Wroblewski E. E., Guethlein L. A., Norman P. J., Li Y. Y., Shaw C. M., Han A. S., Ndjango J. B. N., Ahuka-Mundeke S., Georgiev A. V., Peeters Martine, Hahn B. H., Parham P.
Source
Journal of Immunology, 2017, 198 (9), p. 3480-3493 ISSN 0022-1767
Fast-evolving MHC class I polymorphism serves to diversify NK cell and CD8 T cell responses in individuals, families, and populations. Because only chimpanzee and bonobo have strict orthologs of all HLA class I, their study gives unique perspectives on the human condition. We defined polymorphism of Papa-B, the bonobo ortholog of HLA-B, for six wild bonobo populations. Sequences for Papa-B exon 2 and 3 were determined from the genomic DNA in 255 fecal samples, minimally representing 110 individuals. Twenty-two Papa-B alleles were defined, each encoding a different Papa-B protein. No Papa-B is identical to any chimpanzee Patr-B, human HLA-B, or gorilla Gogo-B. Phylogenetic analysis identified a Glade of MHC-B, defined by residues 45-74 of the alpha(1) domain, which is broadly conserved among bonobo, chimpanzee, and gorilla. Bonobo populations have 3-14 Papa-B allotypes. Three Papa-B are in all populations, and they are each of a different functional type: allotypes having the Bw4 epitope recognized by killer cell Ig-like receptors of NK cells, allotypes having the Cl epitope also recognized by killer cell Ig-like receptors, and allotypes having neither epitope. For population Malebo, these three Papa-B are the only Papa-B allotypes. Although small in number, their sequence divergence is such that the nucleotide diversity (mean proportional distance) of Papa-B in Malebo is greater than in the other populations and is also greater than expected for random combinations of three Papa-B. Overall, Papa-B has substantially less diversity than Patr-B in chimpanzee subspecies and HLA-B in indigenous human populations, consistent with bonobo having experienced narrower population bottlenecks.
Plan de classement
Entomologie médicale / Parasitologie / Virologie [052] ; Sciences du monde animal [080]
Description Géographique
REPUBLIQUE DEMOCRATIQUE DU CONGO
Localisation
Fonds IRD [F B010070038]
Identifiant IRD
fdi:010070038
Contact