2f41: Difference between revisions

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[[Image:2f41.jpg|left|200px]]
{{Seed}}
[[Image:2f41.png|left|200px]]


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{{STRUCTURE_2f41|  PDB=2f41  |  SCENE=  }}  
{{STRUCTURE_2f41|  PDB=2f41  |  SCENE=  }}  


'''Crystal structure of FapR- a global regulator of fatty acid biosynthesis in B. subtilis'''
===Crystal structure of FapR- a global regulator of fatty acid biosynthesis in B. subtilis===




==Overview==
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Malonyl-CoA is an essential intermediate in fatty acid synthesis in all living cells. Here we demonstrate a new role for this molecule as a global regulator of lipid homeostasis in Gram-positive bacteria. Using in vitro transcription and binding studies, we demonstrate that malonyl-CoA is a direct and specific inducer of Bacillus subtilis FapR, a conserved transcriptional repressor that regulates the expression of several genes involved in bacterial fatty acid and phospholipid synthesis. The crystal structure of the effector-binding domain of FapR reveals a homodimeric protein with a thioesterase-like 'hot-dog' fold. Binding of malonyl-CoA promotes a disorder-to-order transition, which transforms an open ligand-binding groove into a long tunnel occupied by the effector molecule in the complex. This ligand-induced modification propagates to the helix-turn-helix motifs, impairing their productive association for DNA binding. Structure-based mutations that disrupt the FapR-malonyl-CoA interaction prevent DNA-binding regulation and result in a lethal phenotype in B. subtilis, suggesting this homeostatic signaling pathway as a promising target for novel chemotherapeutic agents against Gram-positive pathogens.
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{{ABSTRACT_PUBMED_16932747}}


==About this Structure==
==About this Structure==
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[[Category: Guerin, M E.]]
[[Category: Guerin, M E.]]
[[Category: Hot-dog fold]]
[[Category: Hot-dog fold]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 03:26:14 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 16:25:34 2008''

Revision as of 13:25, 29 July 2008

File:2f41.png

Template:STRUCTURE 2f41

Crystal structure of FapR- a global regulator of fatty acid biosynthesis in B. subtilis

Template:ABSTRACT PUBMED 16932747

About this Structure

2F41 is a Single protein structure of sequence from Bacillus subtilis. Full crystallographic information is available from OCA.

Reference

Structural basis of lipid biosynthesis regulation in Gram-positive bacteria., Schujman GE, Guerin M, Buschiazzo A, Schaeffer F, Llarrull LI, Reh G, Vila AJ, Alzari PM, de Mendoza D, EMBO J. 2006 Sep 6;25(17):4074-83. Epub 2006 Aug 24. PMID:16932747

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