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- _5 value "In this study we demonstrated that Sox9, an essential transcription factor of chondrogenesis, binds to the COMP promoter at the PRE in which 13 nucleotides (TGTTTACCTTGTG) are required for the binding of Sox9. Sox9 activates COMP gene expression and this activation is PRE-dependent. Sox9 is required for COMP gene expression during chondrogenesis, since repression of Sox9 expression using the small interfering RNA approach inhibited COMP gene expression. In addition, activation of COMP gene expression by Sox9 requires the participation of transcription factors Sox5 and Sox6 as well as the coactivators CBP and p300 histone acetylase. It appears that there exists a balance between LRF repressor and Sox9 activator in the control of COMP gene, since transactivation of COMP gene by Sox9 was abolished by the coexpression of LRF, and excess Sox9 overcame the LRF-mediated inhibition." provenance.
- _5 wasQuotedFrom 17485346 provenance.