Difference between revisions of "PMID:15063851"

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!align=left align='left' bgcolor='#CCCCFF' |Citation
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'''No author listed'''  (2004) Control of SecA and SecM translation by protein secretion. ''Curr. Opin. Microbiol.'' '''7''':145-50
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!align=left align='left' bgcolor='#CCCCFF' |Abstract
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SecA, the protein translocation ATPase of E. coli is subject to secretion-defect-response control. SecM (secretion monitor) encoded by the 5' region of the secM-secA mRNA is involved in this regulation. SecM translation is subject to transient elongation arrest at Pro166, which is prolonged when export of the nascent SecM is blocked. An "arrest sequence", FXXXXWIXXXXGIRAGP, was identified at a carboxy-terminal region of SecM that interacts with the ribosomal exit tunnel. Presumably, the stalled ribosome disrupts the secondary structure of the secM-secA mRNA such that the Shine-Dalgarno sequence for translation of secA is exposed. Mutation studies established that the SecM elongation arrest is required for the viability of E. coli as well as for constitutive (in secretion-proficient cells) and upregulated (in secretion compromised cells) expression of SecA. Furthermore, evidence suggests that elongation-arresting SecM has a role of upregulating the functionality of newly synthesized SecA molecules, presumably by bringing the mRNA to the vicinity of the membrane/Sec translocation apparatus. These results are discussed in relation to the versatile nature of SecA in its localization and structure.
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[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=15063851 PubMed]
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Online version:[http://dx.doi.org/10.1016/j.mib.2004.01.001 10.1016/j.mib.2004.01.001]
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!align=left align='left' bgcolor='#CCCCFF' |Keywords
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Adenosine Triphosphatases/chemistry; Adenosine Triphosphatases/genetics; Amino Acid Sequence; Bacterial Proteins/chemistry; Bacterial Proteins/genetics; Escherichia coli/genetics; Gene Expression Regulation, Bacterial; Membrane Transport Proteins/chemistry; Membrane Transport Proteins/genetics; Molecular Sequence Data; Protein Biosynthesis/physiology
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==Main Points of the Paper ==
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== Materials and Methods Used ==
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{{LitMaterials}}
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==Phenotype Annotations==
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!|Phenotype of!!Taxon Information!!Genotype Information (if known)!!Condition Information!!OMP ID!!OMP Term Name!!ECO ID!!ECO Term Name!!Notes!!Status
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==Notes==
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==References==
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{{RefHelp}}
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<references/>
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[[Category:Publication]]

Latest revision as of 15:49, 11 September 2013

Citation

No author listed (2004) Control of SecA and SecM translation by protein secretion. Curr. Opin. Microbiol. 7:145-50

Abstract

SecA, the protein translocation ATPase of E. coli is subject to secretion-defect-response control. SecM (secretion monitor) encoded by the 5' region of the secM-secA mRNA is involved in this regulation. SecM translation is subject to transient elongation arrest at Pro166, which is prolonged when export of the nascent SecM is blocked. An "arrest sequence", FXXXXWIXXXXGIRAGP, was identified at a carboxy-terminal region of SecM that interacts with the ribosomal exit tunnel. Presumably, the stalled ribosome disrupts the secondary structure of the secM-secA mRNA such that the Shine-Dalgarno sequence for translation of secA is exposed. Mutation studies established that the SecM elongation arrest is required for the viability of E. coli as well as for constitutive (in secretion-proficient cells) and upregulated (in secretion compromised cells) expression of SecA. Furthermore, evidence suggests that elongation-arresting SecM has a role of upregulating the functionality of newly synthesized SecA molecules, presumably by bringing the mRNA to the vicinity of the membrane/Sec translocation apparatus. These results are discussed in relation to the versatile nature of SecA in its localization and structure.

Links

PubMed Online version:10.1016/j.mib.2004.01.001

Keywords

Adenosine Triphosphatases/chemistry; Adenosine Triphosphatases/genetics; Amino Acid Sequence; Bacterial Proteins/chemistry; Bacterial Proteins/genetics; Escherichia coli/genetics; Gene Expression Regulation, Bacterial; Membrane Transport Proteins/chemistry; Membrane Transport Proteins/genetics; Molecular Sequence Data; Protein Biosynthesis/physiology

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Main Points of the Paper

Please summarize the main points of the paper.

Materials and Methods Used

Please list the materials and methods used in this paper (strains, plasmids, antibodies, etc).

Phenotype Annotations

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Phenotype of Taxon Information Genotype Information (if known) Condition Information OMP ID OMP Term Name ECO ID ECO Term Name Notes Status
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Notes

References

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