1xsa: Difference between revisions
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==Structure of the nudix enzyme AP4A hydrolase from homo sapiens (E63A mutant)== | ==Structure of the nudix enzyme AP4A hydrolase from homo sapiens (E63A mutant)== | ||
<StructureSection load='1xsa' size='340' side='right' caption='[[1xsa]], [[NMR_Ensembles_of_Models | 33 NMR models]]' scene=''> | <StructureSection load='1xsa' size='340' side='right' caption='[[1xsa]], [[NMR_Ensembles_of_Models | 33 NMR models]]' scene=''> | ||
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</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1xsb|1xsb]], [[1xsc|1xsc]]</td></tr> | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1xsb|1xsb]], [[1xsc|1xsc]]</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Bis(5'-nucleosyl)-tetraphosphatase_(asymmetrical) Bis(5'-nucleosyl)-tetraphosphatase (asymmetrical)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.17 3.6.1.17] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Bis(5'-nucleosyl)-tetraphosphatase_(asymmetrical) Bis(5'-nucleosyl)-tetraphosphatase (asymmetrical)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.17 3.6.1.17] </span></td></tr> | ||
<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=1xsa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xsa OCA], [http://pdbe.org/1xsa PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1xsa RCSB], [http://www.ebi.ac.uk/pdbsum/1xsa PDBsum]</span></td></tr> | <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=1xsa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1xsa OCA], [http://pdbe.org/1xsa PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1xsa RCSB], [http://www.ebi.ac.uk/pdbsum/1xsa PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1xsa ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/xs/1xsa_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/xs/1xsa_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
Revision as of 10:19, 18 April 2018
Structure of the nudix enzyme AP4A hydrolase from homo sapiens (E63A mutant)Structure of the nudix enzyme AP4A hydrolase from homo sapiens (E63A mutant)
Structural highlights
Function[AP4A_HUMAN] Asymmetrically hydrolyzes Ap4A to yield AMP and ATP. Plays a major role in maintaining homeostasis. 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 PubMedAsymmetric diadenosine 5',5-P(1),P(4)-tetraphosphate (Ap(4)A) hydrolases play a major role in maintaining homeostasis by cleaving the metabolite diadenosine tetraphosphate (Ap(4)A) back into ATP and AMP. The NMR solution structures of the 17-kDa human asymmetric Ap(4)A hydrolase have been solved in both the presence and absence of the product ATP. The adenine moiety of the nucleotide predominantly binds in a ring stacking arrangement equivalent to that observed in the x-ray structure of the homologue from Caenorhabditis elegans. The binding site is, however, markedly divergent to that observed in the plant/pathogenic bacteria class of enzymes, opening avenues for the exploration of specific therapeutics. Binding of ATP induces substantial conformational and dynamic changes that were not observed in the C. elegans structure. In contrast to the C. elegans homologue, important side chains that play a major role in substrate binding do not have to reorient to accommodate the ligand. This may have important implications in the mechanism of substrate recognition in this class of enzymes. Structure and substrate-binding mechanism of human Ap4A hydrolase.,Swarbrick JD, Buyya S, Gunawardana D, Gayler KR, McLennan AG, Gooley PR J Biol Chem. 2005 Mar 4;280(9):8471-81. Epub 2004 Dec 13. PMID:15596429[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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