2pn5

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{{STRUCTURE_2pn5| PDB=2pn5 | SCENE= }}
{{STRUCTURE_2pn5| PDB=2pn5 | SCENE= }}
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'''Crystal Structure of TEP1r'''
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===Crystal Structure of TEP1r===
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==Overview==
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Thioester-containing proteins (TEPs) are a major component of the innate immune response of insects to invasion by bacteria and protozoa. TEPs form a distinct clade of a superfamily that includes the pan-protease inhibitors alpha(2)-macroglobulins and vertebrate complement factors. The essential feature of these proteins is a sequestered thioester bond that, after cleavage in a protease-sensitive region of the protein, is activated and covalently binds to its target. Recently, TEP1 from the malarial vector Anopheles gambiae was shown to mediate recognition and killing of ookinetes from the malarial parasite Plasmodium berghei, a model for the human malarial parasite Plasmodium falciparum. Here, we present the crystal structure of the TEP1 isoform TEP1r. Although the overall protein fold of TEP1r resembles that of complement factor C3, the TEP1r domains are repositioned to stabilize the inactive conformation of the molecule (containing an intact thioester) in the absence of the anaphylotoxin domain, a central component of complement factors. The structure of TEP1r provides a molecular basis for the differences between TEP1 alleles TEP1r and TEP1s, which correlate with resistance of A. gambiae to infection by P. berghei.
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{{ABSTRACT_PUBMED_17606907}}
==About this Structure==
==About this Structure==
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[[Category: Baxter, R H.G.]]
[[Category: Baxter, R H.G.]]
[[Category: Full-length mature peptide]]
[[Category: Full-length mature peptide]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 11:45:50 2008''

Revision as of 08:45, 28 July 2008

Image:2pn5.png

Template:STRUCTURE 2pn5

Crystal Structure of TEP1r

Template:ABSTRACT PUBMED 17606907

About this Structure

Full crystallographic information is available from OCA.

Reference

Structural basis for conserved complement factor-like function in the antimalarial protein TEP1., Baxter RH, Chang CI, Chelliah Y, Blandin S, Levashina EA, Deisenhofer J, Proc Natl Acad Sci U S A. 2007 Jul 10;104(28):11615-20. Epub 2007 Jul 2. PMID:17606907

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