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| - | [[Image:1yck.gif|left|200px]] | + | {{Seed}} |
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| | {{STRUCTURE_1yck| PDB=1yck | SCENE= }} | | {{STRUCTURE_1yck| PDB=1yck | SCENE= }} |
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| - | '''Crystal structure of human peptidoglycan recognition protein (PGRP-S)'''
| + | ===Crystal structure of human peptidoglycan recognition protein (PGRP-S)=== |
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| - | ==Overview==
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| - | Peptidoglycan recognition proteins (PGRPs) are pattern recognition receptors of the innate immune system that bind peptidoglycans (PGNs) of bacterial cell walls. These molecules, which are highly conserved from insects to mammals, contribute to host defense against infections by both Gram-positive and Gram-negative bacteria. Here, we present the crystal structure of human PGRP-S at 1.70A resolution. The overall structure of PGRP-S, which participates in intracellular killing of Gram-positive bacteria, is similar to that of other PGRPs, including Drosophila PGRP-LB and PGRP-SA and human PGRP-Ialpha. However, comparison with these PGRPs reveals important differences in both the PGN-binding site and a groove formed by the PGRP-specific segment on the opposite face of the molecule. This groove, which may constitute a binding site for effector or signaling proteins, is less hydrophobic and deeper in PGRP-S than in PGRP-IalphaC, whose PGRP-specific segments vary considerably in amino acid sequence. By docking a PGN ligand into the PGN-binding cleft of PGRP-S based on the known structure of a PGRP-Ialpha-PGN complex, we identified potential PGN-binding residues in PGRP-S. Differences in PGN-contacting residues and interactions suggest that, although PGRPs may engage PGNs in a similar mode, structural differences exist that likely regulate the affinity and fine specificity of PGN recognition.
| + | The line below this paragraph, {{ABSTRACT_PUBMED_15769462}}, adds the Publication Abstract to the page |
| | + | (as it appears on PubMed at http://www.pubmed.gov), where 15769462 is the PubMed ID number. |
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| | + | {{ABSTRACT_PUBMED_15769462}} |
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| | ==About this Structure== | | ==About this Structure== |
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| | [[Category: Peptidoglycan recognition]] | | [[Category: Peptidoglycan recognition]] |
| | [[Category: Pgrp-]] | | [[Category: Pgrp-]] |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 16:09:17 2008'' | + | |
| | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 19:11:24 2008'' |
Revision as of 16:11, 28 July 2008
Template:STRUCTURE 1yck
Crystal structure of human peptidoglycan recognition protein (PGRP-S)
Template:ABSTRACT PUBMED 15769462
About this Structure
1YCK is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Crystal structure of human peptidoglycan recognition protein S (PGRP-S) at 1.70 A resolution., Guan R, Wang Q, Sundberg EJ, Mariuzza RA, J Mol Biol. 2005 Apr 8;347(4):683-91. PMID:15769462
Page seeded by OCA on Mon Jul 28 19:11:24 2008
