[Factors of tissue-specific transcription of immunoglobulin kappa genes].
Proteins TIF1 and TIF2 with mol mass 90 and 94 kD, respectively, were found in myeloma cells. They bind to the promoter region of the kappa genes. Protein TIF1 was found in nonlymphoid cells (HeLa, liver cells). From myeloma MPOC21 a fraction was isolated enriched 400 fold with TIF2 by fractionation on ion-exchangers DE52 and P11 and hydroxylapatite. The purified protein protected the DNA site that contained 30bp including the conservative sequence TNATTTGCAT located upstream of the kappa gene promoter against the action of DNAase. Addition of the purified factor to the extract from HeLa cells increased several fold the efficiency of transcription and corrected the initiation of transcription.
D000818:Animals; D002474:Cell-Free System; D006367:HeLa Cells; D006801:Humans; D006825:Hybridomas; D007145:Immunoglobulin kappa-Chains / Q000235:genetics*; D051379:Mice; D009101:Multiple Myeloma; D011401:Promoter Regions, Genetic; D012091:Repetitive Sequences, Nucleic Acid; D014157:Transcription Factors / Q000235:genetics*; D014158:Transcription, Genetic
D007145:Immunoglobulin kappa-Chains; D014157:Transcription Factors
Faktory tkanespetsificheskoĭ transkriptsii kappa-genov immunoglobulinov.