Open AccessThe Novel Function of OCT4B Isoform‐265 in Genotoxic Stress
Author(s) -
Gao Yuan,
Wei Jianshu,
Han Jin,
Wang Xia,
Su Guannan,
Zhao Yannan,
Chen Bing,
Xiao Zhifeng,
Cao Jiani,
Dai Jianwu
Publication year - 2012
Publication title -
stem cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.159
H-Index - 229
eISSN - 1549-4918
pISSN - 1066-5099
DOI - 10.1002/stem.1034
Subject(s) - gene isoform , biology , alternative splicing , embryonic stem cell , microbiology and biotechnology , transcription factor , gene , function (biology) , gene expression , regulation of gene expression , rna splicing , genetics , rna
OCT4 is a key transcription factor in maintaining the pluripotency and self‐renewal of embryonic stem cells (ESCs). Human OCT4 gene can generate three mRNA isoforms (OCT4A, OCT4B, and OCT4B1) by alternative splicing and four protein isoforms (OCT4A, OCT4B‐265, OCT4B‐190, and OCT4B‐164) by alternative splicing or alternative translation initiation. OCT4A is a transcription factor responsible for the stemness of ESCs, while the function of OCT4B protein isoforms is still not clear. We have previously reported that OCT4B‐190 functioned in cell stress response. Here, we present another product of OCT4 gene, OCT4B‐265, which is upregulated under genotoxic stress in stem cells, and it may function in stress response through p53 signaling pathway. This work gives an insight into the novel function of OCT4B protein isoforms and helps us to understand the complex expression patterns and biological functions of OCT4 gene. S TEM C ELLS 2012; 30:665–672