5hlo
From Proteopedia
(Difference between revisions)
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of calcium and zinc-bound human S100A8 in space group C2221== | |
| - | + | <StructureSection load='5hlo' size='340' side='right' caption='[[5hlo]], [[Resolution|resolution]] 2.10Å' scene=''> | |
| - | + | == Structural highlights == | |
| - | + | <table><tr><td colspan='2'>[[5hlo]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5HLO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5HLO FirstGlance]. <br> | |
| - | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CAC:CACODYLATE+ION'>CAC</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | |
| - | [[Category: | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5hlo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5hlo OCA], [http://pdbe.org/5hlo PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5hlo RCSB], [http://www.ebi.ac.uk/pdbsum/5hlo PDBsum]</span></td></tr> |
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/S10A8_HUMAN S10A8_HUMAN]] S100A8 is a calcium- and zinc-binding protein which plays a prominent role in the regulation of inflammatory processes and immune response. It can induce neutrophil chemotaxis and adhesion. Predominantly found as calprotectin (S100A8/A9) which has a wide plethora of intra- and extracellular functions. The intracellular functions include: facilitating leukocyte arachidonic acid trafficking and metabolism, modulation of the tubulin-dependent cytoskeleton during migration of phagocytes and activation of the neutrophilic NADPH-oxidase. Activates NADPH-oxidase by facilitating the enzyme complex assembly at the cell membrane, transfering arachidonic acid, an essential cofactor, to the enzyme complex and S100A8 contributes to the enzyme assembly by directly binding to NCF2/P67PHOX. The extracellular functions involve proinfammatory, antimicrobial, oxidant-scavenging and apoptosis-inducing activities. Its proinflammatory activity includes recruitment of leukocytes, promotion of cytokine and chemokine production, and regulation of leukocyte adhesion and migration. Acts as an alarmin or a danger associated molecular pattern (DAMP) molecule and stimulates innate immune cells via binding to pattern recognition receptors such as Toll-like receptor 4 (TLR4) and receptor for advanced glycation endproducts (AGER). Binding to TLR4 and AGER activates the MAP-kinase and NF-kappa-B signaling pathways resulting in the amplification of the proinflammatory cascade. Has antimicrobial activity towards bacteria and fungi and exerts its antimicrobial activity probably via chelation of Zn(2+) which is essential for microbial growth. Can induce cell death via autophagy and apoptosis and this occurs through the cross-talk of mitochondria and lysosomes via reactive oxygen species (ROS) and the process involves BNIP3. Can regulate neutrophil number and apoptosis by an anti-apoptotic effect; regulates cell survival via ITGAM/ITGB and TLR4 and a signaling mechanism involving MEK-ERK. Its role as an oxidant scavenger has a protective role in preventing exaggerated tissue damage by scavenging oxidants. Can act as a potent amplifier of inflammation in autoimmunity as well as in cancer development and tumor spread.<ref>PMID:12626582</ref> <ref>PMID:15331440</ref> <ref>PMID:15598812</ref> <ref>PMID:15642721</ref> <ref>PMID:16258195</ref> <ref>PMID:19087201</ref> <ref>PMID:19122197</ref> <ref>PMID:19935772</ref> <ref>PMID:21487906</ref> <ref>PMID:22808130</ref> <ref>PMID:22363402</ref> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Andersen, G R]] | ||
[[Category: Lin, H]] | [[Category: Lin, H]] | ||
| - | [[Category: Andersen, G.R]] | ||
[[Category: Yatime, L]] | [[Category: Yatime, L]] | ||
| + | [[Category: Calcium]] | ||
| + | [[Category: Oligomer]] | ||
| + | [[Category: S100 protein]] | ||
| + | [[Category: Signaling protein]] | ||
| + | [[Category: Zinc]] | ||
Revision as of 15:24, 20 June 2016
Crystal structure of calcium and zinc-bound human S100A8 in space group C2221
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Categories: Andersen, G R | Lin, H | Yatime, L | Calcium | Oligomer | S100 protein | Signaling protein | Zinc
