1z6i
From Proteopedia
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| - | [[Image:1z6i.gif|left|200px]] | + | [[Image:1z6i.gif|left|200px]] |
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| - | '''Crystal structure of the ectodomain of Drosophila transmembrane receptor PGRP-LCa''' | + | {{Structure |
| + | |PDB= 1z6i |SIZE=350|CAPTION= <scene name='initialview01'>1z6i</scene>, resolution 2.50Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene> and <scene name='pdbligand=SO4:SULFATE ION'>SO4</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= PGRP-LC, ird7, PGRPLC ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=7227 Drosophila melanogaster]) | ||
| + | }} | ||
| + | |||
| + | '''Crystal structure of the ectodomain of Drosophila transmembrane receptor PGRP-LCa''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1Z6I is a [ | + | 1Z6I is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Z6I OCA]. |
==Reference== | ==Reference== | ||
| - | Structure of the ectodomain of Drosophila peptidoglycan-recognition protein LCa suggests a molecular mechanism for pattern recognition., Chang CI, Ihara K, Chelliah Y, Mengin-Lecreulx D, Wakatsuki S, Deisenhofer J, Proc Natl Acad Sci U S A. 2005 Jul 19;102(29):10279-84. Epub 2005 Jul 8. PMID:[http:// | + | Structure of the ectodomain of Drosophila peptidoglycan-recognition protein LCa suggests a molecular mechanism for pattern recognition., Chang CI, Ihara K, Chelliah Y, Mengin-Lecreulx D, Wakatsuki S, Deisenhofer J, Proc Natl Acad Sci U S A. 2005 Jul 19;102(29):10279-84. Epub 2005 Jul 8. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16006509 16006509] |
[[Category: Drosophila melanogaster]] | [[Category: Drosophila melanogaster]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: mixed beta-sheet]] | [[Category: mixed beta-sheet]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:31:44 2008'' |
Revision as of 13:31, 20 March 2008
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| , resolution 2.50Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | and | ||||||
| Gene: | PGRP-LC, ird7, PGRPLC (Drosophila melanogaster) | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of the ectodomain of Drosophila transmembrane receptor PGRP-LCa
Overview
The peptidoglycan-recognition protein LCa (PGRP-LCa) is a transmembrane receptor required for activation of the Drosophila immune deficiency pathway by monomeric Gram-negative peptidoglycan. We have determined the crystal structure of the ectodomain of PGRP-LCa at 2.5-A resolution and found two unique helical insertions in the LCa ectodomain that disrupt an otherwise L-shaped peptidoglycan-docking groove present in all other known PGRP structures. The deficient binding of PGRP-LCa to monomeric peptidoglycan was confirmed by biochemical pull-down assays. Recognition of monomeric peptidoglycan involves both PGRP-LCa and -LCx. We showed that association of the LCa and LCx ectodomains in vitro depends on monomeric peptidoglycan. The presence of a defective peptidoglycan-docking groove, while preserving a unique role in mediating monomeric peptidoglycan induction of immune response, suggests that PGRP-LCa recognizes the exposed structural features of a monomeric muropeptide when the latter is bound to and presented by the ectodomain of PGRP-LCx. Such features include N-acetyl glucosamine and the anhydro bond in the glycan of the muropeptide, which have been demonstrated to be critical for immune stimulatory activity.
About this Structure
1Z6I is a Single protein structure of sequence from Drosophila melanogaster. Full crystallographic information is available from OCA.
Reference
Structure of the ectodomain of Drosophila peptidoglycan-recognition protein LCa suggests a molecular mechanism for pattern recognition., Chang CI, Ihara K, Chelliah Y, Mengin-Lecreulx D, Wakatsuki S, Deisenhofer J, Proc Natl Acad Sci U S A. 2005 Jul 19;102(29):10279-84. Epub 2005 Jul 8. PMID:16006509
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