PMID:2671645: Difference between revisions

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<span style = 'font-size: large'> '''Ueguchi, C, Wittekind, M, Nomura, M, Akiyama, Y and Ito, K'''  (1989) The secY-rpmJ region of the spc ribosomal protein operon in Escherichia coli: structural alterations affecting secY expression.''Mol. Gen. Genet.'' '''217''':1-5</span>
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'''Ueguchi, C, Wittekind, M, Nomura, M, Akiyama, Y and Ito, K'''  (1989) The secY-rpmJ region of the spc ribosomal protein operon in Escherichia coli: structural alterations affecting secY expression. ''Mol. Gen. Genet.'' '''217''':1-5
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!align=left  |Abstract
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A unique feature of the spc ribosomal protein operon is that its region distal to the promoter contains a gene (secY) for an integral membrane protein, followed by an open reading frame termed X which has recently been proposed to encode a new ribosomal protein (protein B). We now show that the open reading frame X indeed directs the synthesis of a protein with electrophoretic mobilities similar to the B protein, and this supports the proposal that X may be more appropriately called rpmJ. Insertion of a plasmid sequence into the secY-rpmJ boundary of the chromosome caused a reduced expression of secY probably by destabilizing the secY part of the message. The results of complementation experiments suggested that a normal level of expression of rpmJ is not required for growth or protein secretion.
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[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=2671645 PubMed]


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|{{TableHeadingColor}} |'''Abstract''' || A unique feature of the spc ribosomal protein operon is that its region distal to the promoter contains a gene (secY) for an integral membrane protein, followed by an open reading frame termed X which has recently been proposed to encode a new ribosomal protein (protein B). We now show that the open reading frame X indeed directs the synthesis of a protein with electrophoretic mobilities similar to the B protein, and this supports the proposal that X may be more appropriately called rpmJ. Insertion of a plasmid sequence into the secY-rpmJ boundary of the chromosome caused a reduced expression of secY probably by destabilizing the secY part of the message. The results of complementation experiments suggested that a normal level of expression of rpmJ is not required for growth or protein secretion.
!align=left  |Keywords
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Bacterial Proteins/biosynthesis; Bacterial Proteins/genetics; Biological Transport; Chromosome Mapping; DNA/genetics; Electrophoresis, Gel, Two-Dimensional; Escherichia coli/genetics; Escherichia coli/growth & development; Gene Amplification; Gene Expression Regulation; Genetic Complementation Test; Membrane Proteins/biosynthesis; Membrane Proteins/genetics; Mutation; Operon; Plasmids; Promoter Regions, Genetic; Ribosomal Proteins/genetics; Ribosomal Proteins/metabolism; Ribosomal Proteins/secretion
|{{TableHeadingColor}} nowrap |'''Links''' ||  [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=2671645 PubMed]
 
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Latest revision as of 04:44, 15 September 2013

Citation

Ueguchi, C, Wittekind, M, Nomura, M, Akiyama, Y and Ito, K (1989) The secY-rpmJ region of the spc ribosomal protein operon in Escherichia coli: structural alterations affecting secY expression. Mol. Gen. Genet. 217:1-5

Abstract

A unique feature of the spc ribosomal protein operon is that its region distal to the promoter contains a gene (secY) for an integral membrane protein, followed by an open reading frame termed X which has recently been proposed to encode a new ribosomal protein (protein B). We now show that the open reading frame X indeed directs the synthesis of a protein with electrophoretic mobilities similar to the B protein, and this supports the proposal that X may be more appropriately called rpmJ. Insertion of a plasmid sequence into the secY-rpmJ boundary of the chromosome caused a reduced expression of secY probably by destabilizing the secY part of the message. The results of complementation experiments suggested that a normal level of expression of rpmJ is not required for growth or protein secretion.

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Keywords

Bacterial Proteins/biosynthesis; Bacterial Proteins/genetics; Biological Transport; Chromosome Mapping; DNA/genetics; Electrophoresis, Gel, Two-Dimensional; Escherichia coli/genetics; Escherichia coli/growth & development; Gene Amplification; Gene Expression Regulation; Genetic Complementation Test; Membrane Proteins/biosynthesis; Membrane Proteins/genetics; Mutation; Operon; Plasmids; Promoter Regions, Genetic; Ribosomal Proteins/genetics; Ribosomal Proteins/metabolism; Ribosomal Proteins/secretion

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