3t0f: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
==IspH:HMBPP (substrate) structure of the E126D mutant== | ==IspH:HMBPP (substrate) structure of the E126D mutant== | ||
<StructureSection load='3t0f' size='340' side='right' caption='[[3t0f]], [[Resolution|resolution]] 1.90Å' scene=''> | <StructureSection load='3t0f' size='340' side='right' caption='[[3t0f]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3t0f]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[3t0f]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3T0F OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3T0F FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=F3S:FE3-S4+CLUSTER'>F3S</scene>, <scene name='pdbligand=H6P:(2E)-4-HYDROXY-3-METHYLBUT-2-EN-1-YL+TRIHYDROGEN+DIPHOSPHATE'>H6P</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=F3S:FE3-S4+CLUSTER'>F3S</scene>, <scene name='pdbligand=H6P:(2E)-4-HYDROXY-3-METHYLBUT-2-EN-1-YL+TRIHYDROGEN+DIPHOSPHATE'>H6P</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3f7t|3f7t]], [[3dnf|3dnf]], [[3szl|3szl]], [[3szo|3szo]], [[3szu|3szu]], [[3t0g|3t0g]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3f7t|3f7t]], [[3dnf|3dnf]], [[3szl|3szl]], [[3szo|3szo]], [[3szu|3szu]], [[3t0g|3t0g]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ispH, lytB, yaaE, b0029, JW0027 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id= | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">ispH, lytB, yaaE, b0029, JW0027 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/4-hydroxy-3-methylbut-2-enyl_diphosphate_reductase 4-hydroxy-3-methylbut-2-enyl diphosphate reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.17.1.2 1.17.1.2] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/4-hydroxy-3-methylbut-2-enyl_diphosphate_reductase 4-hydroxy-3-methylbut-2-enyl diphosphate reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.17.1.2 1.17.1.2] </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=3t0f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t0f OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3t0f RCSB], [http://www.ebi.ac.uk/pdbsum/3t0f 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=3t0f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t0f OCA], [http://pdbe.org/3t0f PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3t0f RCSB], [http://www.ebi.ac.uk/pdbsum/3t0f PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3t0f ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
| Line 19: | Line 20: | ||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 3t0f" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[4-hydroxy-3-methylbut-2-enyl diphosphate reductase|4-hydroxy-3-methylbut-2-enyl diphosphate reductase]] | |||
== References == | == References == | ||
<references/> | <references/> | ||
| Line 24: | Line 29: | ||
</StructureSection> | </StructureSection> | ||
[[Category: 4-hydroxy-3-methylbut-2-enyl diphosphate reductase]] | [[Category: 4-hydroxy-3-methylbut-2-enyl diphosphate reductase]] | ||
[[Category: | [[Category: Ecoli]] | ||
[[Category: Bacher, A]] | [[Category: Bacher, A]] | ||
[[Category: Eisenreich, W]] | [[Category: Eisenreich, W]] | ||
Revision as of 06:42, 5 August 2016
IspH:HMBPP (substrate) structure of the E126D mutantIspH:HMBPP (substrate) structure of the E126D mutant
Structural highlights
Function[ISPH_ECOLI] Converts 1-hydroxy-2-methyl-2-(E)-butenyl 4-diphosphate into isopentenyl diphosphate (IPP) and dimethylallyl diphosphate (DMAPP). Is also involved in penicillin tolerance and control of the stringent response. Seems to directly or indirectly interact with RelA to maintain it in an inactive form during normal growth.[1] [2] [3] Publication Abstract from PubMedIsoprenoids derive from two universal precursors, isopentenyl diphosphate and dimethylallyl diphosphate, which in most human pathogens are synthesized in the deoxyxylulose phosphate pathway. The last step of this pathway is the conversion of (E)-1-hydroxy-2-methylbut-2-enyl-4-diphosphate into a mixture of isopentenyl diphosphate and dimethylallyl diphosphate catalyzed by the iron-sulfur protein IspH. The crystal structures reported here of the IspH mutant proteins T167C, E126D and E126Q reveal an alternative substrate conformation compared to the wild-type structure. Thus, the previously observed alkoxide complex decomposes, and the substrate's hydroxymethyl group rotates to interact with Glu126. The carboxyl group of Glu126 then donates a proton to the hydroxyl group to enable water elimination. The structural and functional studies provide further knowledge of the IspH reaction mechanism, which opens up new routes to inhibitor design against malaria and tuberculosis. Crystal Structures of Mutant IspH Proteins Reveal a Rotation of the Substrate's Hydroxymethyl Group during Catalysis.,Span I, Grawert T, Bacher A, Eisenreich W, Groll M J Mol Biol. 2011 Nov 23. PMID:22137895[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
|
| ||||||||||||||||||||||