Conservation of binding sites for regulatory factors in the coordinately expressed α1(I) and α2(I) collagen promoters

作者: Gerard Karsenty , Benoit de Crombrugghe

DOI: 10.1016/0006-291X(91)92017-E

关键词: Transcription (biology)GenePromoterDNARepressorPoint mutationBiologyBinding siteMolecular biologyHomology (biology)

摘要: Abstract To examine possible mechanisms for the coordinate control of α1(I) and α2(I) collagen genes, we have searched DNA binding factors that are common to both genes. We recently identified in proximal part promoter a functional site CBF, heteromeric transcriptional activator which binds certain CCAAT sequences, also sites two different repressors, designated IF1 IF2. CBF was previously shown bind activate promoter. now present evidence factor with similar characteristics as at approximately same distances from start transcription A three bp substitution mutation abolishes increases activity 4-fold propose regulation these genes is least mediated by elements.

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