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PMID: 1729613 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S.

Factors involved in specific transcription by mammalian RNA polymerase II: purification and analysis of transcription factor IIA and identification of transcription factor IIJ.

Molecular and cellular biology ·Vol. 12 ·No. 1 ·1992-01-00 ·Pages 413-21

Cortes P, Flores O, Reinberg D

Abstract

The previously described transcription factor IIA (TFIIA) protein fraction was separated into two factors that affect transcription, TFIIA and TFIIJ. TFIIA was found to have a stimulatory effect, and TFIIJ was found to be required for transcription. The requirement of TFIIJ was observed when bacterially produced purified human or yeast (Saccharomyces cerevisiae) TATA-binding protein (TBP) was used in lieu of the endogenous HeLa cell TFIID complex, suggesting that TFIIJ may be part of the TFIID complex. The stimulatory activity of TFIIA was found also to be dependent on the source of the TBP. Transcription reactions reconstituted with TFIID were stimulated by TFIIA; however, when human or yeast TBP was used instead of TFIID, TFIIA had no effect. TFIIA was found to interact with the TBP and was extensively purified by the use of affinity chromatography on columns containing immobilized recombinant yeast TBP. TFIIA is a heterotrimer composed of polypeptides of 34, 19, and 14 kDa. These three polypeptides were required to isolate, by using the gel mobility shift assay, a stable complex between TBP and the TATA box sequence.

MeSH Terms
Chromatography DNA-Binding Proteins/isolation & purification,metabolism Deoxyribonuclease I/metabolism Electrophoresis, Polyacrylamide Gel HeLa Cells Humans RNA Polymerase II/metabolism TATA Box Transcription Factor TFIIA Transcription Factors/isolation & purification,metabolism Transcription, Genetic
Chemicals
DNA-Binding Proteins Transcription Factor TFIIA Transcription Factors RNA Polymerase II Deoxyribonuclease I
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Cortes P
Department of Biochemistry, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, Piscataway 08854-5635.
Flores O
Reinberg D
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Article Info
Journal
Molecular and cellular biology
Abbr.
Mol Cell Biol
ISSN
0270-7306
DOI
10.1128/mcb.12.1.413-421.1992
Published
1992-01-00
Pages
413-21
Language
English
Region
United States
NLM ID
8109087
PMCID
PMC364136
Subset
IM
Grants
NIGMS NIH HHS · GM 37110 · United States
External Links
PubMed source DOI: 10.1128/mcb.12.1.413-421.1992 PMC Full Text View journal details
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