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| | ==Crystal structure of Mycobacterium tuberculosis maltose kinase MaK== | | ==Crystal structure of Mycobacterium tuberculosis maltose kinase MaK== |
| - | <StructureSection load='4o7o' size='340' side='right' caption='[[4o7o]], [[Resolution|resolution]] 2.40Å' scene=''> | + | <StructureSection load='4o7o' size='340' side='right'caption='[[4o7o]], [[Resolution|resolution]] 2.40Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4o7o]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_tuberculosis"_(zopf_1883)_klein_1884 "bacillus tuberculosis" (zopf 1883) klein 1884]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4O7O OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4O7O FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4o7o]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis Mycobacterium tuberculosis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4O7O OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4O7O FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4o7p|4o7p]]</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=4o7o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4o7o OCA], [https://pdbe.org/4o7o PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4o7o RCSB], [https://www.ebi.ac.uk/pdbsum/4o7o PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4o7o ProSAT]</span></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">mak, Rv0127 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1773 "Bacillus tuberculosis" (Zopf 1883) Klein 1884])</td></tr>
| + | |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Maltokinase Maltokinase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.1.175 2.7.1.175] </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=4o7o FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4o7o OCA], [http://pdbe.org/4o7o PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4o7o RCSB], [http://www.ebi.ac.uk/pdbsum/4o7o PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4o7o ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/MAK1_MYCTU MAK1_MYCTU] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Maltokinase]] | + | [[Category: Large Structures]] |
| - | [[Category: Guan, X T]] | + | [[Category: Mycobacterium tuberculosis]] |
| - | [[Category: Li, J]] | + | [[Category: Guan XT]] |
| - | [[Category: Rao, Z H]] | + | [[Category: Li J]] |
| - | [[Category: Atp binding]] | + | [[Category: Rao ZH]] |
| - | [[Category: Kinase]]
| + | |
| - | [[Category: Maltose binding]]
| + | |
| - | [[Category: Maltose kinase]]
| + | |
| - | [[Category: Transferase]]
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| Structural highlights
Function
MAK1_MYCTU
Publication Abstract from PubMed
Mycobacterium tuberculosis (Mtb) uses maltose-1-phosphate to synthesize alpha-glucans that make up the major component of its outer capsular layer. Maltose kinase (MaK) catalyzes phosphorylation of maltose. The molecular basis for this phosphorylation is currently not understood. Here, we describe the first crystal structure of MtbMaK refined to 2.4 A resolution. The bi-modular architecture of MtbMaK reveals a remarkably unique N-lobe. An extended sheet protrudes into ligand binding pocket of an adjacent monomer and contributes residues critical for kinase activity. Structure of the complex of MtbMaK bound with maltose reveals that maltose binds in a shallow cavity of the C-lobe. Structural constraints permit phosphorylation of alpha-maltose only. Surprisingly, instead of a Gly-rich loop, MtbMaK employs 'EQS' loop to tether ATP. Notably, this loop is conserved across all MaK homologues. Structures of MtbMaK presented here unveil features that are markedly different from other kinases and support the scaffolding role proposed for this kinase.
Homotypic dimerization of a maltose kinase for molecular scaffolding.,Li J, Guan X, Shaw N, Chen W, Dong Y, Xu X, Li X, Rao Z Sci Rep. 2014 Sep 23;4:6418. doi: 10.1038/srep06418. PMID:25245657[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Li J, Guan X, Shaw N, Chen W, Dong Y, Xu X, Li X, Rao Z. Homotypic dimerization of a maltose kinase for molecular scaffolding. Sci Rep. 2014 Sep 23;4:6418. doi: 10.1038/srep06418. PMID:25245657 doi:http://dx.doi.org/10.1038/srep06418
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