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| | <StructureSection load='2ph4' size='340' side='right'caption='[[2ph4]], [[Resolution|resolution]] 2.05Å' scene=''> | | <StructureSection load='2ph4' size='340' side='right'caption='[[2ph4]], [[Resolution|resolution]] 2.05Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[2ph4]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Zhaoermia_mangshanensis Zhaoermia mangshanensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PH4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2PH4 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[2ph4]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Protobothrops_mangshanensis Protobothrops mangshanensis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2PH4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2PH4 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.05Å</td></tr> |
| | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ph4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ph4 OCA], [https://pdbe.org/2ph4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ph4 RCSB], [https://www.ebi.ac.uk/pdbsum/2ph4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ph4 ProSAT]</span></td></tr> | | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ph4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ph4 OCA], [https://pdbe.org/2ph4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ph4 RCSB], [https://www.ebi.ac.uk/pdbsum/2ph4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ph4 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[https://www.uniprot.org/uniprot/PA2H_PROMB PA2H_PROMB]] Snake venom phospholipase A2 homolog that induces myonecrosis, and edema. Has low myotoxic activity.<ref>PMID:16635500</ref>
| + | [https://www.uniprot.org/uniprot/PA2H_PROMB PA2H_PROMB] Snake venom phospholipase A2 homolog that induces myonecrosis, and edema. Has low myotoxic activity.<ref>PMID:16635500</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | </StructureSection> | | </StructureSection> |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Zhaoermia mangshanensis]] | + | [[Category: Protobothrops mangshanensis]] |
| - | [[Category: Arni, R K]] | + | [[Category: Arni RK]] |
| - | [[Category: Kuch, U]] | + | [[Category: Kuch U]] |
| - | [[Category: Mebs, D]] | + | [[Category: Mebs D]] |
| - | [[Category: Murakami, M T]] | + | [[Category: Murakami MT]] |
| - | [[Category: Arg49]]
| + | |
| - | [[Category: Myotoxin]]
| + | |
| - | [[Category: Phospholipase a2]]
| + | |
| - | [[Category: Snake venom]]
| + | |
| - | [[Category: Toxin]]
| + | |
| Structural highlights
Function
PA2H_PROMB Snake venom phospholipase A2 homolog that induces myonecrosis, and edema. Has low myotoxic activity.[1]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The venom of Zhaoermia mangshanensis, encountered solely in Mt Mang in China's Hunan Province, exhibits coagulant, phosphodiesterase, l-amino acid oxidase, kallikrein, phospholipase A2 and myotoxic activities. The catalytically inactive PLA2 homolog referred to as zhaoermiatoxin is highly myotoxic and displays high myonecrotic and edema activities. Zhaoermiatoxin possesses a molecular weight of 13,972Da, consists of 121 amino-acid residues cross-linked by seven disulfide bridges and shares high sequence homology with Lys49-PLA2s from the distantly related Asian pitvipers. However, zhaoermiatoxin possesses an arginine residue at position 49 instead of a lysine, thereby suggesting a secondary Lys49-->Arg substitution which results in a catalytically inactive protein. We have determined the first crystal structure of zhaoermiatoxin, an Arg49-PLA2, from Zhaoermia mangshanensis venom at 2.05 angstroms resolution, which represents a novel member of phospholipase A2 family. In this structure, unlike the Lys49 PLA2s, the C-terminus is well ordered and an unexpected non-polarized state of the putative calcium-binding loop due to the flip of Lys122 towards the bulk solvent is observed. The orientation of the Arg-49 side chain results in a similar binding mode to that observed in the Lys49 PLA2s; however, the guadinidium group is tri-coordinated by carbonyl oxygen atoms of the putative calcium-binding loop, whereas the Nzeta atom of lysine is tetra-coordinated as a result of the different conformation adopted by the putative calcium-binding loop.
Crystal structure of a novel myotoxic Arg49 phospholipase A2 homolog (zhaoermiatoxin) from Zhaoermia mangshanensis snake venom: insights into Arg49 coordination and the role of Lys122 in the polarization of the C-terminus.,Murakami MT, Kuch U, Betzel C, Mebs D, Arni RK Toxicon. 2008 Apr;51(5):723-35. Epub 2007 Nov 29. PMID:18295812[2]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Mebs D, Kuch U, Coronas FI, Batista CV, Gumprecht A, Possani LD. Biochemical and biological activities of the venom of the Chinese pitviper Zhaoermia mangshanensis, with the complete amino acid sequence and phylogenetic analysis of a novel Arg49 phospholipase A2 myotoxin. Toxicon. 2006 Jun 1;47(7):797-811. Epub 2006 Mar 24. PMID:16635500 doi:http://dx.doi.org/10.1016/j.toxicon.2006.01.031
- ↑ Murakami MT, Kuch U, Betzel C, Mebs D, Arni RK. Crystal structure of a novel myotoxic Arg49 phospholipase A2 homolog (zhaoermiatoxin) from Zhaoermia mangshanensis snake venom: insights into Arg49 coordination and the role of Lys122 in the polarization of the C-terminus. Toxicon. 2008 Apr;51(5):723-35. Epub 2007 Nov 29. PMID:18295812 doi:10.1016/j.toxicon.2007.11.018
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