1hq0

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{{STRUCTURE_1hq0| PDB=1hq0 | SCENE= }}
{{STRUCTURE_1hq0| PDB=1hq0 | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE CATALYTIC DOMAIN OF E.COLI CYTOTOXIC NECROTIZING FACTOR TYPE 1'''
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===CRYSTAL STRUCTURE OF THE CATALYTIC DOMAIN OF E.COLI CYTOTOXIC NECROTIZING FACTOR TYPE 1===
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==Overview==
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Certain uropathogenic and neonatal meningitis-causing strains of Escherichia coli express a 114 kDa protein toxin called cytotoxic necrotizing factor 1 (CNF1). The toxin causes alteration of the host cell actin cytoskeleton and promotes bacterial invasion of blood-brain barrier endothelial cells. CNF1 belongs to a unique group of large cytotoxins that cause constitutive activation of Rho guanosine triphosphatases (GTPases), which are key regulators of the actin cytoskeleton. This group also includes E. coli cytotoxic necrotizing factor 2 (CNF2, 114 kDa) and dermonecrotic toxins (DNT, 159 kDa) of Bordetella spp. with related sequences occurring in Yersinia spp. Here we show that the catalytic region of CNF1 exhibits a novel protein fold as determined by its 1.83 A resolution crystal structure. The structure reveals that CNF1 has a Cys-His-main chain oxygen catalytic triad reminiscent of enzymes belonging to the catalytic triad superfamily. The position of the catalytic Cys residue at the base of a deep pocket restricts access to potential substrates and helps explain the high specificity of this and related toxins.
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(as it appears on PubMed at http://www.pubmed.gov), where 11427886 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11427886}}
==About this Structure==
==About this Structure==
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[[Category: Rho deamidase]]
[[Category: Rho deamidase]]
[[Category: Rho transglutaminase]]
[[Category: Rho transglutaminase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 19:06:22 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 08:31:17 2008''

Revision as of 05:31, 1 July 2008

Image:1hq0.png

Template:STRUCTURE 1hq0

CRYSTAL STRUCTURE OF THE CATALYTIC DOMAIN OF E.COLI CYTOTOXIC NECROTIZING FACTOR TYPE 1

Template:ABSTRACT PUBMED 11427886

About this Structure

1HQ0 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Structure of the Rho-activating domain of Escherichia coli cytotoxic necrotizing factor 1., Buetow L, Flatau G, Chiu K, Boquet P, Ghosh P, Nat Struct Biol. 2001 Jul;8(7):584-8. PMID:11427886

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