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1zgw

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[[Image:1zgw.gif|left|200px]]
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[[Image:1zgw.png|left|200px]]
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{{STRUCTURE_1zgw| PDB=1zgw | SCENE= }}
{{STRUCTURE_1zgw| PDB=1zgw | SCENE= }}
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'''NMR structure of E. Coli Ada protein in complex with DNA'''
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===NMR structure of E. Coli Ada protein in complex with DNA===
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==Overview==
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The transcriptional activity of many sequence-specific DNA binding proteins is directly regulated by posttranslational covalent modification. Although this form of regulation was first described nearly two decades ago, it remains poorly understood at a mechanistic level. The prototype for a transcription factor controlled by posttranslational modification is E. coli Ada protein, a chemosensor that both repairs methylation damage in DNA and coordinates the resistance response to genotoxic methylating agents. Ada repairs methyl phosphotriester lesions in DNA by transferring the aberrant methyl group to one of its own cysteine residues; this site-specific methylation enhances tremendously the DNA binding activity of the protein, thereby enabling it to activate a methylation-resistance regulon. Here, we report solution and X-ray structures of the Cys-methylated chemosensor domain of Ada bound to DNA. The structures reveal that both phosphotriester repair and methylation-dependent transcriptional activation function through a zinc- and methylation-dependent electrostatic switch.
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(as it appears on PubMed at http://www.pubmed.gov), where 16209950 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16209950}}
==About this Structure==
==About this Structure==
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1ZGW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZGW OCA].
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1ZGW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZGW OCA].
==Reference==
==Reference==
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[[Category: Protein-dna complex]]
[[Category: Protein-dna complex]]
[[Category: Zinc ligand]]
[[Category: Zinc ligand]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 17:36:34 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 22:27:43 2008''

Revision as of 19:27, 27 July 2008

Image:1zgw.png

Template:STRUCTURE 1zgw

NMR structure of E. Coli Ada protein in complex with DNA

Template:ABSTRACT PUBMED 16209950

About this Structure

1ZGW is a Single protein structure of sequence from Escherichia coli. Full experimental information is available from OCA.

Reference

A methylation-dependent electrostatic switch controls DNA repair and transcriptional activation by E. coli ada., He C, Hus JC, Sun LJ, Zhou P, Norman DP, Dotsch V, Wei H, Gross JD, Lane WS, Wagner G, Verdine GL, Mol Cell. 2005 Oct 7;20(1):117-29. PMID:16209950

Page seeded by OCA on Sun Jul 27 22:27:43 2008

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