2WCQ image
Entry Detail
PDB ID:
2WCQ
Keywords:
IMMUNE SYSTEM
Title:
Crystal Structure of Tip-Alpha N34 (HP0596) from Helicobacter pylori at pH4
Biological Source:
Source Organism:
HELICOBACTER PYLORI
Host Organism:
ESCHERICHIA COLI
PDB Version:
Deposition Date:
2009-03-13
Release Date:
2009-05-12
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.90 Å
R-Value Free:
0.23
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 1 21 1
2WCQ validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:TNF-ALPHA INDUCER PROTEIN
Chain IDs:A, B
Chain Length:159
Number of Molecules:2
Biological Source:HELICOBACTER PYLORI
UniProt ID:O25318 Pfam ID:PF16753
Ligand Molecules
CIT
Primary Citation
Structures of the Tumor Necrosis Factor Alpha Inducing Protein Tipalpha: A Novel Virulence Factor from Helicobacter Pylori.
FEBS Lett. 583 1581 ? (2009)
PMID: 19401200 DOI: 10.1016/J.FEBSLET.2009.04.033

Abstact

Helicobacter pylori secretes a unique virulence factor, Tipalpha, that enters gastric cells and both stimulates the production of the TNF-alpha and activates the NF-kappaB pathway. The structures of a truncated version of Tipalpha (TipalphaN34) in two crystal forms are presented here. Tipalpha adopts a novel beta(1)alpha(1)alpha(2)beta(2)beta(3)alpha(3)alpha(4) topology that can be described as a combination of three domains. A first region consists in a short flexible extension, a second displays a dodecin-like fold and a third is a helical bundle domain similar to the sterile alpha motif (SAM). Analysis of the oligomerisation states of TipalphaN34 in the crystals and in solution suggests that the disulfide bridges could hold together Tipalpha monomers during their secretion in the gastric environment.

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Primary Citation of related structures
2WCR