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PMID: 3321052 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Comparative mutational analysis of wild-type and stretched tRNA3(Leu) gene promoters.

Fabrizio P, Coppo A, Fruscoloni P, Benedetti P, Di Segni G, Tocchini-Valentini GP

Abstract

We demonstrate that, when the yeast tRNA(3Leu) gene is stretched so that the distance between the two portions of the intragenic promoter is increased to 365 base pairs, the A and B blocks remain functional. Mutations in the A block, which show a weak phenotype when inserted in the wild type, exert a dramatic effect when inserted into the stretched gene. Experiments with extensively purified transcription factor tau indicate that the tau B-B block interaction is not influenced by A-B distance; only the ability of tau A to interact with A block sequences is affected, possibly because of the additional free-energy cost of forming a large loop of the intervening DNA.

MeSH Terms
Base Sequence Binding Sites DNA Mutational Analysis DNA, Fungal/genetics DNA-Binding Proteins/physiology Gene Expression Regulation Molecular Sequence Data Promoter Regions, Genetic RNA, Transfer, Amino Acid-Specific/genetics RNA, Transfer, Leu/genetics Saccharomyces cerevisiae/genetics Transcription Factors/physiology Transcription, Genetic
Chemicals
DNA, Fungal DNA-Binding Proteins RNA, Transfer, Amino Acid-Specific RNA, Transfer, Leu Transcription Factors
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Fabrizio P
Dipartimento di Biologia Cellulare e dello Sviluppo, Università degli Studi La Sapienza, Rome, Italy.
Coppo A
Fruscoloni P
Benedetti P
Di Segni G
Tocchini-Valentini G P
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
Published
1987-12-00
Pages
8763-7
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC299630
Subset
IM
Databases
GENBANK
M19060
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