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PMID: 6327651 Published · ppublish English Journal Article Research Support, U.S. Gov't, P.H.S.

Structure of an Escherichia coli tRNA operon containing linked genes for arginine, histidine, leucine, and proline tRNAs.

Journal of bacteriology ·Vol. 158 ·No. 3 ·1984-06-00 ·Pages 934-42

Hsu LM, Klee HJ, Zagorski J, Fournier MJ

Abstract

A plasmid containing a gene for the most abundant Escherichia coli leucine isoacceptor tRNA, tRNALeu1 (anticodon CAG) was isolated from the Clarke-Carbon bank of cloned E. coli DNA. The clone contains a 12.3-kilobase DNA insert which was mapped by F' DNA hybridization analysis to the region 82 to 89 min on the chromosome. The cloned tDNALeu corresponds to the minor of two chromosomal regions containing different amounts of DNA complementary to tRNALeuCAG . Sequencing of the tDNA region revealed it to contain a multimeric transcription unit consisting of four different tRNA genes. The genes are in the arrangement 5'-leader- tRNAArgCCG -57 base pairs- tRNAHisGUG -20 base pairs- tRNALeuCAG -42 base pairs- tRNAProUGG -3'. Coordinate expression of the component tRNAs in vivo and the absence of intercistronic promoters indicated that all four tDNAs reside in the same operon. The tDNA sequence is bounded by a promoter element showing good agreement with the procaryotic consensus sequence and a GC-rich stem-loop element that corresponds to a rho-independent terminator. The promoter region contains a GC-rich sequence that agrees with a suggested consensus stringency control element and two domains possessing dyad symmetry which flank the Pribnow box and include the putative stringency control region.

MeSH Terms
Base Sequence DNA Restriction Enzymes Escherichia coli/genetics Genes Nucleic Acid Conformation Nucleic Acid Hybridization Operon Plasmids RNA, Transfer/genetics RNA, Transfer, Amino Acyl/genetics
Chemicals
RNA, Transfer, Amino Acyl RNA, Transfer DNA Restriction Enzymes
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Hsu L M
Klee H J
Zagorski J
Fournier M J
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54 references, click to expand
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Article Info
Journal
Journal of bacteriology
Abbr.
J Bacteriol
ISSN
0021-9193
DOI
10.1128/jb.158.3.934-942.1984
Published
1984-06-00
Pages
934-42
Language
English
Region
United States
NLM ID
2985120R
PMCID
PMC215531
Subset
IM
Grants
NIGMS NIH HHS · GM07473 · United States
NIGMS NIH HHS · GM19351 · United States
Databases
GENBANK
K01994
External Links
PubMed source DOI: 10.1128/jb.158.3.934-942.1984 PMC Full Text View journal details
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