Evolutionary analysis and expression profiling of zebra finch immune genes.
Evolutionary analysis and expression profiling of zebra finch immune genes.
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DOI:
10.1093/gbe/evq061
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发表时间:
2010
影响因子:
3.3
通讯作者:
Burke T
中科院分区:
文献类型:
--
作者:
Ekblom R;French L;Slate J;Burke T
Genes of the immune system are generally considered to evolve rapidly due to host–parasite coevolution. They are therefore of great interest in evolutionary biology and molecular ecology. In this study, we manually annotated 144 avian immune genes from the zebra finch (Taeniopygia guttata) genome and conducted evolutionary analyses of these by comparing them with their orthologs in the chicken (Gallus gallus). Genes classified as immune receptors showed elevated dN/dS ratios compared with other classes of immune genes. Immune genes in general also appear to be evolving more rapidly than other genes, as inferred from a higher dN/dS ratio compared with the rest of the genome. Furthermore, ten genes (of 27) for which sequence data were available from at least three bird species showed evidence of positive selection acting on specific codons. From transcriptome data of eight different tissues, we found evidence for expression of 106 of the studied immune genes, with primary expression of most of these in bursa, blood, and spleen. These immune-related genes showed a more tissue-specific expression pattern than other genes in the zebra finch genome. Several of the avian immune genes investigated here provide strong candidates for in-depth studies of molecular adaptation in birds.
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影响因子:
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Balakrishnan CN;Ekblom R;Völker M;Westerdahl H;Godinez R;Kotkiewicz H;Burt DW;Graves T;Griffin DK;Warren WC;Edwards SV
通讯作者:
Edwards SV
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通讯作者:
Frishman, D