1dc7

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[[Image:1dc7.jpg|left|200px]]
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{{Seed}}
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{{STRUCTURE_1dc7| PDB=1dc7 | SCENE= }}
{{STRUCTURE_1dc7| PDB=1dc7 | SCENE= }}
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'''STRUCTURE OF A TRANSIENTLY PHOSPHORYLATED "SWITCH" IN BACTERIAL SIGNAL TRANSDUCTION'''
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===STRUCTURE OF A TRANSIENTLY PHOSPHORYLATED "SWITCH" IN BACTERIAL SIGNAL TRANSDUCTION===
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==Overview==
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Receiver domains are the dominant molecular switches in bacterial signalling. Although several structures of non-phosphorylated receiver domains have been reported, a detailed structural understanding of the activation arising from phosphorylation has been impeded by the very short half-lives of the aspartylphosphate linkages. Here we present the first structure of a receiver domain in its active state, the phosphorylated receiver domain of the bacterial enhancer-binding protein NtrC (nitrogen regulatory protein C). Nuclear magnetic resonance spectra were taken during steady-state autophosphorylation/dephosphorylation, and three-dimensional spectra from multiple samples were combined. Phosphorylation induces a large conformational change involving a displacement of beta-strands 4 and 5 and alpha-helices 3 and 4 away from the active site, a register shift and an axial rotation in helix 4. This creates an exposed hydrophobic surface that is likely to transmit the signal to the transcriptional activation domain.
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{{ABSTRACT_PUBMED_10622255}}
==About this Structure==
==About this Structure==
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1DC7 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Salmonella_typhimurium Salmonella typhimurium]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DC7 OCA].
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1DC7 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Salmonella_typhimurium Salmonella typhimurium]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DC7 OCA].
==Reference==
==Reference==
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[[Category: Signal transduction]]
[[Category: Signal transduction]]
[[Category: Two-component system]]
[[Category: Two-component system]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 13:40:58 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 22:48:35 2008''

Revision as of 19:48, 30 June 2008

Image:1dc7.png

Template:STRUCTURE 1dc7

STRUCTURE OF A TRANSIENTLY PHOSPHORYLATED "SWITCH" IN BACTERIAL SIGNAL TRANSDUCTION

Template:ABSTRACT PUBMED 10622255

About this Structure

1DC7 is a Single protein structure of sequence from Salmonella typhimurium. Full experimental information is available from OCA.

Reference

Structure of a transiently phosphorylated switch in bacterial signal transduction., Kern D, Volkman BF, Luginbuhl P, Nohaile MJ, Kustu S, Wemmer DE, Nature. 1999 Dec 23-30;402(6764):894-8. PMID:10622255

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