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- W2104578024 abstract "Oct-4 is a POU domain transcription factor that is critical for maintaining pluripotency and for stem cell renewal. Previous studies suggest that transcription regulation by Oct-4 at particular enhancers requires the input of a postulated E1A-like cofactor that is specific to pluripotent cells. However, such studies have been limited to the use of enhancer elements that bind other POU-protein family members in addition to Oct-4, thus preventing a 'clean' assessment of any Oct-4:cofactor relationships. Other attempts to study Oct-4 functionality in a more 'stand-alone' situation target Oct-4 transactivation domains to DNA using heterologous binding domains, a methodology which is known to generate artificial data. To circumvent these issues, an altered-specificity binding Oct-4 (Oct-4RR) and accompanying binding site, which binds Oct-4RR only, were generated. This strategy has previously been shown to maintain Oct-1:cofactor interactions that are highly binding-site and protein/binding conformation specific. This system therefore allows a stand-alone study of Oct-4 function in pluripotent versus differentiated cells, without interference from endogenous POU factors and with minimal deviation from bound wild-type protein characteristics. Subsequently, it was demonstrated that Oct-4RR and the highly transactive regions of its N-terminus determined here, and its C-terminus, have the same transactivation profile in pluripotent and differentiated cells, thus providing strong evidence against the existence of such a pluripotent cell-specific Oct-4 cofactor." @default.
- W2104578024 created "2016-06-24" @default.
- W2104578024 creator A5083467513 @default.
- W2104578024 date "2005-10-12" @default.
- W2104578024 modified "2023-10-18" @default.
- W2104578024 title "Use of altered-specificity binding Oct-4 suggests an absence of pluripotent cell-specific cofactor usage" @default.
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- W2104578024 doi "https://doi.org/10.1093/nar/gki907" @default.
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