Difference between revisions of "PMID:17565995"

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'''Gutiérrez, P , Kozlov, G , Gabrielli, L , Elias, D , Osborne, MJ , Gallouzi, IE  and Gehring, K '''  (2007) Solution structure of YaeO, a Rho-specific inhibitor of transcription termination. ''J. Biol. Chem.'' '''282''':23348-53
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!align=left  |Abstract
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Rho-dependent transcription termination is an essential process for the regulation of bacterial gene expression. Thus far, only two Rho-specific inhibitors of bacterial transcription termination have been described, the psu protein from the satellite bacteriophage P4 and YaeO from Escherichia coli. Here, we report the solution structure of YaeO, the first of a Rho-specific inhibitor of transcription termination. YaeO is an acidic protein composed of an N-terminal helix and a seven-stranded beta sandwich. NMR chemical shift perturbation experiments revealed that YaeO binds proximal to the primary nucleic acid binding site of Rho. Based on the NMR titrations, a docked model of the YaeO-Rho complex was calculated. These results suggest that YaeO binds outside the Rho hexamer, acting as a competitive inhibitor of RNA binding. In vitro gel shift assays confirmed the inhibition of nucleic acid binding to Rho. Site-directed mutagenesis showed that the negative character of YaeO is essential for its function in vivo.
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[http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=17565995 PubMed]
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Online version:[http://dx.doi.org/10.1074/jbc.M702010200 10.1074/jbc.M702010200]
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Amino Acid Sequence; Binding, Competitive; Escherichia coli/metabolism; Escherichia coli Proteins/chemistry; Escherichia coli Proteins/physiology; Magnetic Resonance Spectroscopy; Models, Biological; Models, Molecular; Molecular Conformation; Molecular Sequence Data; Mutagenesis, Site-Directed; Protein Conformation; Protein Structure, Secondary; Protein Structure, Tertiary; Sequence Homology, Amino Acid; beta-Galactosidase/metabolism; rho GTP-Binding Proteins/metabolism
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==Main Points of the Paper ==
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== Materials and Methods Used ==
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==Phenotype Annotations==
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==Notes==
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==References==
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[[Category:Publication]]

Latest revision as of 11:58, 17 September 2012

Citation

Gutiérrez, P , Kozlov, G , Gabrielli, L , Elias, D , Osborne, MJ , Gallouzi, IE and Gehring, K (2007) Solution structure of YaeO, a Rho-specific inhibitor of transcription termination. J. Biol. Chem. 282:23348-53

Abstract

Rho-dependent transcription termination is an essential process for the regulation of bacterial gene expression. Thus far, only two Rho-specific inhibitors of bacterial transcription termination have been described, the psu protein from the satellite bacteriophage P4 and YaeO from Escherichia coli. Here, we report the solution structure of YaeO, the first of a Rho-specific inhibitor of transcription termination. YaeO is an acidic protein composed of an N-terminal helix and a seven-stranded beta sandwich. NMR chemical shift perturbation experiments revealed that YaeO binds proximal to the primary nucleic acid binding site of Rho. Based on the NMR titrations, a docked model of the YaeO-Rho complex was calculated. These results suggest that YaeO binds outside the Rho hexamer, acting as a competitive inhibitor of RNA binding. In vitro gel shift assays confirmed the inhibition of nucleic acid binding to Rho. Site-directed mutagenesis showed that the negative character of YaeO is essential for its function in vivo.

Links

PubMed Online version:10.1074/jbc.M702010200

Keywords

Amino Acid Sequence; Binding, Competitive; Escherichia coli/metabolism; Escherichia coli Proteins/chemistry; Escherichia coli Proteins/physiology; Magnetic Resonance Spectroscopy; Models, Biological; Models, Molecular; Molecular Conformation; Molecular Sequence Data; Mutagenesis, Site-Directed; Protein Conformation; Protein Structure, Secondary; Protein Structure, Tertiary; Sequence Homology, Amino Acid; beta-Galactosidase/metabolism; rho GTP-Binding Proteins/metabolism

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Main Points of the Paper

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Materials and Methods Used

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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

References

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