Tuesday, May 12, 2009

Geography and genetics of p53 in E. Asia

Winter Temperature and UV Are Tightly Linked to Genetic Changes in the p53 Tumor Suppressor Pathway in Eastern Asia
Hong Shi,Si-jie Tan,Hua Zhong,Wenwei Hu,Arnold Levine,Chun-jie Xiao,Yi Peng,Xue-bin Qi,Wei-hua Shou,Run-lin Z. Ma,Yi Li,Bing Su, andXin Lu
AJHG Volume 84, Issue 4, 534-541, 02 April 2009

Abstract: The tumor suppressor p53 is a master sensor of stress. Two human-specific polymorphisms, p53 codon 72 and MDM2 SNP309, influence the activities of p53. There is a tight association between cold winter temperature and p53 Arg72 and between low UV intensity and MDM2 SNP309 G/G in a cohort of 4029 individuals across Eastern Asia that suggests causative selection. Moreover, the two polymorphisms are not coselected. Haplotype-based selection analysis further suggests that this is a striking example of two functional polymorphisms being strongly selected for in human populations in response to environmental stresses.

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