c-Jun is a proto-oncogene that forms a complex with c-Fos which regulates transcription from promoters containing AP-1 activation elements. c-Jun has specific DNA binding activity and following in vitro translation, c-Jun binds as a homodimer to the AP-1 DNA site. The transactivating function of c-Jun is acutely regulated by a wide variety of cellular signals via modulation of phosphorylation of two serines (63 and 73). Jun N-terminal domain kinases (JNKs), are responsible for mediating S63/73 phosphorylation on c-Jun in response to a variety of cellular stimuli including TNF-a, heat stress and u.v. light.
The c-Jun and c-fos proto-oncogenes encode proteins that form a complex which regulates transcription from promoters containing AP-1 activation elements. c-Jun has specific DNA binding activity, while c-Fos has homology to the putative DNA binding domain of c-Jun. Following in
The transactivating function of the c-Jun proto-oncogene component of the AP-1 transcription factor is acutely regulated by a wide variety of cellular signals via modulation of phosphorylation of two serines (63 and 73). The viral oncoprotein, v-Jun, while containing homologous
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