This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
4eno
From Proteopedia
(Difference between revisions)
| (3 intermediate revisions not shown.) | |||
| Line 1: | Line 1: | ||
| + | |||
==Crystal structure of oxidized human nm23-H1== | ==Crystal structure of oxidized human nm23-H1== | ||
| - | <StructureSection load='4eno' size='340' side='right' caption='[[4eno]], [[Resolution|resolution]] 2.80Å' scene=''> | + | <StructureSection load='4eno' size='340' side='right'caption='[[4eno]], [[Resolution|resolution]] 2.80Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[4eno]] is a 2 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[4eno]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ENO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4ENO FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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=4eno FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4eno OCA], [https://pdbe.org/4eno PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4eno RCSB], [https://www.ebi.ac.uk/pdbsum/4eno PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4eno ProSAT]</span></td></tr> | |
| - | + | ||
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | + | |
</table> | </table> | ||
| + | == Function == | ||
| + | [[https://www.uniprot.org/uniprot/NDKA_HUMAN NDKA_HUMAN]] Major role in the synthesis of nucleoside triphosphates other than ATP. Possesses nucleoside-diphosphate kinase, serine/threonine-specific protein kinase, geranyl and farnesyl pyrophosphate kinase, histidine protein kinase and 3'-5' exonuclease activities. Involved in cell proliferation, differentiation and development, signal transduction, G protein-coupled receptor endocytosis, and gene expression. Required for neural development including neural patterning and cell fate determination.<ref>PMID:2056128</ref> <ref>PMID:8810265</ref> <ref>PMID:12628186</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Nm23-H1/NDPK-A, a tumour metastasis suppressor, is a multifunctional housekeeping enzyme with nucleoside diphosphate kinase activity. Hexameric Nm23-H1 is required for suppression of tumour metastasis and it is dissociated into dimers under oxidative conditions. Here, the crystal structure of oxidized Nm23-H1 is presented. It reveals the formation of an intramolecular disulfide bond between Cys4 and Cys145 that triggers a large conformational change that destabilizes the hexameric state. The dependence of the dissociation dynamics on the H2O2 concentration was determined using hydrogen/deuterium-exchange experiments. The quaternary conformational change provides a suitable environment for the oxidation of Cys109 to sulfonic acid, as demonstrated by peptide sequencing using nanoUPLC-ESI-q-TOF tandem MS. From these and other data, it is proposed that the molecular and cellular functions of Nm23-H1 are regulated by a series of oxidative modifications coupled to its oligomeric states and that the modified cysteines are resolvable by NADPH-dependent reduction systems. These findings broaden the understanding of the complicated enzyme-regulatory mechanisms that operate under oxidative conditions. | ||
| + | |||
| + | Structure of Nm23-H1 under oxidative conditions.,Kim MS, Jeong J, Jeong J, Shin DH, Lee KJ Acta Crystallogr D Biol Crystallogr. 2013 Apr;69(Pt 4):669-80. doi:, 10.1107/S0907444913001194. Epub 2013 Mar 14. PMID:23519676<ref>PMID:23519676</ref> | ||
| + | |||
| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 4eno" style="background-color:#fffaf0;"></div> | ||
==See Also== | ==See Also== | ||
| - | *[[Nucleoside diphosphate kinase|Nucleoside diphosphate kinase]] | + | *[[Nucleoside diphosphate kinase 3D structures|Nucleoside diphosphate kinase 3D structures]] |
| + | == References == | ||
| + | <references/> | ||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
| - | [[Category: | + | [[Category: Large Structures]] |
| - | [[Category: Kim | + | [[Category: Kim M-S]] |
| - | [[Category: Shin | + | [[Category: Shin D-H]] |
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
Current revision
Crystal structure of oxidized human nm23-H1
| |||||||||||
