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Genetic signature of strong recent positive selection at interleukin-32 gene in goat

OBJECTIVE: Identification of the candidate genes that play key roles in phenotypic variations can provide new information about evolution and positive selection. Interleukin (IL)-32 is involved in many biological processes, however, its role for the immune response against various diseases in mammal...

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Detalles Bibliográficos
Autores principales: Asif, Akhtar Rasool, Qadri, Sumayyah, Ijaz, Nabeel, Javed, Ruheena, Ansari, Abdur Rahman, Awais, Muhammd, Younus, Muhammad, Riaz, Hasan, Du, Xiaoyong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Asian-Australasian Association of Animal Production Societies (AAAP) and Korean Society of Animal Science and Technology (KSAST) 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5495668/
https://www.ncbi.nlm.nih.gov/pubmed/27165029
http://dx.doi.org/10.5713/ajas.15.0941
Descripción
Sumario:OBJECTIVE: Identification of the candidate genes that play key roles in phenotypic variations can provide new information about evolution and positive selection. Interleukin (IL)-32 is involved in many biological processes, however, its role for the immune response against various diseases in mammals is poorly understood. Therefore, the current investigation was performed for the better understanding of the molecular evolution and the positive selection of single nucleotide polymorphisms in IL-32 gene. METHODS: By using fixation index (F(ST)) based method, IL-32 (9375) gene was found to be outlier and under significant positive selection with the provisional combined allocation of mean heterozygosity and F(ST). Using nucleotide sequences of 11 mammalian species from National Center for Biotechnology Information database, the evolutionary selection of IL-32 gene was determined using Maximum likelihood model method, through four models (M1a, M2a, M7, and M8) in Codeml program of phylogenetic analysis by maximum liklihood. RESULTS: IL-32 is detected under positive selection using the F(ST) simulations method. The phylogenetic tree revealed that goat IL-32 was in close resemblance with sheep IL-32. The coding nucleotide sequences were compared among 11 species and it was found that the goat IL-32 gene shared identity with sheep (96.54%), bison (91.97%), camel (58.39%), cat (56.59%), buffalo (56.50%), human (56.13%), dog (50.97%), horse (54.04%), and rabbit (53.41%) respectively. CONCLUSION: This study provides evidence for IL-32 gene as under significant positive selection in goat.