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| | ==Crystal structure of the c707s mutant of c-terminal domain of 10'formyltetrahydrofolate dehydrogenase in complex with NADPH== | | ==Crystal structure of the c707s mutant of c-terminal domain of 10'formyltetrahydrofolate dehydrogenase in complex with NADPH== |
| - | <StructureSection load='4go0' size='340' side='right' caption='[[4go0]], [[Resolution|resolution]] 3.38Å' scene=''> | + | <StructureSection load='4go0' size='340' side='right'caption='[[4go0]], [[Resolution|resolution]] 3.38Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4go0]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Buffalo_rat Buffalo rat]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GO0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4GO0 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4go0]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4GO0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4GO0 FirstGlance]. <br> |
| - | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</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]] 3.38Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4gnz|4gnz]], [[4go2|4go2]]</td></tr>
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</scene></td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">Aldh1l1, Fthfd ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10116 Buffalo rat])</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=4go0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4go0 OCA], [https://pdbe.org/4go0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4go0 RCSB], [https://www.ebi.ac.uk/pdbsum/4go0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4go0 ProSAT]</span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Formyltetrahydrofolate_dehydrogenase Formyltetrahydrofolate dehydrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.5.1.6 1.5.1.6] </span></td></tr>
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| - | <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=4go0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4go0 OCA], [http://pdbe.org/4go0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4go0 RCSB], [http://www.ebi.ac.uk/pdbsum/4go0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4go0 ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| - | <div style="background-color:#fffaf0;">
| + | == Function == |
| - | == Publication Abstract from PubMed == | + | [https://www.uniprot.org/uniprot/AL1L1_RAT AL1L1_RAT] |
| - | Aldh1l1, also known as 10-formyltetrahydrofolate dehydrogenase (FDH), contains the carboxy-terminal domain (C(t)-FDH), which is a structural and functional homolog of aldehyde dehydrogenases (ALDHs). This domain is capable of catalyzing the NADP(+)-dependent oxidation of short chain aldehydes to their corresponding acids, and similar to most ALDHs it has two conserved catalytic residues, Cys707 and Glu673. Previously, we demonstrated that in the C(t)-FDH mechanism these residues define the conformation of the bound coenzyme and the affinity of its interaction with the protein. Specifically, the replacement of Cys707 with an alanine resulted in the enzyme lacking the ability to differentiate between the oxidized and reduced coenzyme. We suggested that this was due to the loss of a covalent bond between the cysteine and the C4N atom of nicotinamide ring of NADP(+) formed during C(t)-FDH catalysis. To obtain further insight into the functional significance of the covalent bond between Cys707 and the coenzyme, and the overall role of the two catalytic residues in the coenzyme binding and positioning, we have now solved crystal structures of C(t)-FDH in the complex with thio-NADP(+) and the complexes of the C707S mutant with NADP(+) and NADPH. This study has allowed us to trap the coenzyme in the contracted conformation, which provided a snapshot of the conformational processing of the coenzyme during the transition from oxidized to reduced form. Overall, the results of this study further support the previously proposed mechanism by which Cys707 helps to differentiate between the oxidized and reduced coenzyme during ALDH catalysis.
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| - | The mechanism of discrimination between oxidized and reduced coenzyme in the aldehyde dehydrogenase domain of Aldh1l1.,Tsybovsky Y, Malakhau Y, Strickland KC, Krupenko SA Chem Biol Interact. 2013 Jan 5. pii: S0009-2797(12)00285-2. doi:, 10.1016/j.cbi.2012.12.015. PMID:23295222<ref>PMID:23295222</ref>
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| - | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| - | </div>
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| - | <div class="pdbe-citations 4go0" style="background-color:#fffaf0;"></div>
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| - | == References ==
| + | |
| - | <references/>
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Buffalo rat]] | + | [[Category: Large Structures]] |
| - | [[Category: Formyltetrahydrofolate dehydrogenase]] | + | [[Category: Rattus norvegicus]] |
| - | [[Category: Tsybovsky, Y]] | + | [[Category: Tsybovsky Y]] |
| - | [[Category: Aldehyde dehydrogenase]]
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| - | [[Category: Fdh]]
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| - | [[Category: Oxidoreductase]]
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