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| - | [[Image:1dhf.gif|left|200px]] | |
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| - | {{Structure
| + | ==CRYSTAL STRUCTURES OF RECOMBINANT HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH FOLATE AND 5-DEAZOFOLATE== |
| - | |PDB= 1dhf |SIZE=350|CAPTION= <scene name='initialview01'>1dhf</scene>, resolution 2.3Å
| + | <StructureSection load='1dhf' size='340' side='right'caption='[[1dhf]], [[Resolution|resolution]] 2.30Å' scene=''> |
| - | |SITE=
| + | == Structural highlights == |
| - | |LIGAND= <scene name='pdbligand=FOL:FOLIC+ACID'>FOL</scene>
| + | <table><tr><td colspan='2'>[[1dhf]] 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=1DHF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DHF FirstGlance]. <br> |
| - | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Dihydrofolate_reductase Dihydrofolate reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.5.1.3 1.5.1.3] </span>
| + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.3Å</td></tr> |
| - | |GENE=
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FOL:FOLIC+ACID'>FOL</scene></td></tr> |
| - | |DOMAIN=
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1dhf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dhf OCA], [https://pdbe.org/1dhf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dhf RCSB], [https://www.ebi.ac.uk/pdbsum/1dhf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dhf ProSAT]</span></td></tr> |
| - | |RELATEDENTRY= | + | </table> |
| - | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dhf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dhf OCA], [http://www.ebi.ac.uk/pdbsum/1dhf PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1dhf RCSB]</span>
| + | == Disease == |
| - | }}
| + | [https://www.uniprot.org/uniprot/DYR_HUMAN DYR_HUMAN] Defects in DHFR are the cause of megaloblastic anemia due to dihydrofolate reductase deficiency (DHFRD) [MIM:[https://omim.org/entry/613839 613839]. DHFRD is an inborn error of metabolism, characterized by megaloblastic anemia and/or pancytopenia, severe cerebral folate deficiency, and cerebral tetrahydrobiopterin deficiency. Clinical features include variable neurologic symptoms, ranging from severe developmental delay and generalized seizures in infancy, to childhood absence epilepsy with learning difficulties, to lack of symptoms.<ref>PMID:21310276</ref> <ref>PMID:21310277</ref> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/DYR_HUMAN DYR_HUMAN] Key enzyme in folate metabolism. Contributes to the de novo mitochondrial thymidylate biosynthesis pathway. Catalyzes an essential reaction for de novo glycine and purine synthesis, and for DNA precursor synthesis. Binds its own mRNA and that of DHFRL1.<ref>PMID:21876188</ref> <ref>PMID:12096917</ref> |
| | + | == Evolutionary Conservation == |
| | + | [[Image:Consurf_key_small.gif|200px|right]] |
| | + | Check<jmol> |
| | + | <jmolCheckbox> |
| | + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dh/1dhf_consurf.spt"</scriptWhenChecked> |
| | + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> |
| | + | <text>to colour the structure by Evolutionary Conservation</text> |
| | + | </jmolCheckbox> |
| | + | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1dhf ConSurf]. |
| | + | <div style="clear:both"></div> |
| | | | |
| - | '''CRYSTAL STRUCTURES OF RECOMBINANT HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH FOLATE AND 5-DEAZOFOLATE'''
| + | ==See Also== |
| - | | + | *[[Dihydrofolate reductase 3D structures|Dihydrofolate reductase 3D structures]] |
| - | | + | == References == |
| - | ==Overview== | + | <references/> |
| - | The 2.3-A crystal structure of recombinant human dihydrofolate reductase (EC 1.5.1.3, DHFR) has been solved as a binary complex with folate (a poor substrate at neutral pH) and also as a binary complex with an inhibitor, 5-deazafolate. The inhibitor appears to be protonated at N8 on binding, whereas folate is not. Rotation of the peptide plane joining I7 and V8 from its position in the folate complex permits hydrogen bonding of 5-deazafolate's protonated N8 to the backbone carbonyl of I7, thus contributing to the enzyme's greater affinity for 5-deazafolate than for folate. In this respect it is likely that bound 5-deazafolate furnishes a model for 7,8-dihydrofolate binding and, in addition, resembles the transition state for folate reduction. A hypothetical transition-state model for folate reduction, generated by superposition of the DHFR binary complexes human.5-deazafolate and chicken liver.NADPH, reveals a 1-A overlap of the binding sites for folate's pteridine ring and the dihydronicotinamide ring of NADPH. It is proposed that this binding-site overlap accelerates the reduction of both folate and 7,8-dihydrofolate by simultaneously binding substrate and cofactor with a sub van der Waals separation that is optimal for hydride transfer.
| + | __TOC__ |
| - | | + | </StructureSection> |
| - | ==About this Structure==
| + | |
| - | 1DHF is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DHF OCA].
| + | |
| - | | + | |
| - | ==Reference== | + | |
| - | Crystal structures of recombinant human dihydrofolate reductase complexed with folate and 5-deazafolate., Davies JF 2nd, Delcamp TJ, Prendergast NJ, Ashford VA, Freisheim JH, Kraut J, Biochemistry. 1990 Oct 9;29(40):9467-79. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/2248959 2248959]
| + | |
| - | [[Category: Dihydrofolate reductase]]
| + | |
| | [[Category: Homo sapiens]] | | [[Category: Homo sapiens]] |
| - | [[Category: Single protein]] | + | [[Category: Large Structures]] |
| - | [[Category: /II, J F.Davies.]] | + | [[Category: Davies /II JF]] |
| - | [[Category: Kraut, J.]] | + | [[Category: Kraut J]] |
| - | [[Category: oxido-reductase]]
| + | |
| - | | + | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 19:41:36 2008''
| + | |
| Structural highlights
Disease
DYR_HUMAN Defects in DHFR are the cause of megaloblastic anemia due to dihydrofolate reductase deficiency (DHFRD) [MIM:613839. DHFRD is an inborn error of metabolism, characterized by megaloblastic anemia and/or pancytopenia, severe cerebral folate deficiency, and cerebral tetrahydrobiopterin deficiency. Clinical features include variable neurologic symptoms, ranging from severe developmental delay and generalized seizures in infancy, to childhood absence epilepsy with learning difficulties, to lack of symptoms.[1] [2]
Function
DYR_HUMAN Key enzyme in folate metabolism. Contributes to the de novo mitochondrial thymidylate biosynthesis pathway. Catalyzes an essential reaction for de novo glycine and purine synthesis, and for DNA precursor synthesis. Binds its own mRNA and that of DHFRL1.[3] [4]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
See Also
References
- ↑ Banka S, Blom HJ, Walter J, Aziz M, Urquhart J, Clouthier CM, Rice GI, de Brouwer AP, Hilton E, Vassallo G, Will A, Smith DE, Smulders YM, Wevers RA, Steinfeld R, Heales S, Crow YJ, Pelletier JN, Jones S, Newman WG. Identification and characterization of an inborn error of metabolism caused by dihydrofolate reductase deficiency. Am J Hum Genet. 2011 Feb 11;88(2):216-25. doi: 10.1016/j.ajhg.2011.01.004. PMID:21310276 doi:10.1016/j.ajhg.2011.01.004
- ↑ Cario H, Smith DE, Blom H, Blau N, Bode H, Holzmann K, Pannicke U, Hopfner KP, Rump EM, Ayric Z, Kohne E, Debatin KM, Smulders Y, Schwarz K. Dihydrofolate reductase deficiency due to a homozygous DHFR mutation causes megaloblastic anemia and cerebral folate deficiency leading to severe neurologic disease. Am J Hum Genet. 2011 Feb 11;88(2):226-31. doi: 10.1016/j.ajhg.2011.01.007. PMID:21310277 doi:10.1016/j.ajhg.2011.01.007
- ↑ Anderson DD, Quintero CM, Stover PJ. Identification of a de novo thymidylate biosynthesis pathway in mammalian mitochondria. Proc Natl Acad Sci U S A. 2011 Sep 13;108(37):15163-8. doi:, 10.1073/pnas.1103623108. Epub 2011 Aug 26. PMID:21876188 doi:10.1073/pnas.1103623108
- ↑ Klon AE, Heroux A, Ross LJ, Pathak V, Johnson CA, Piper JR, Borhani DW. Atomic structures of human dihydrofolate reductase complexed with NADPH and two lipophilic antifolates at 1.09 a and 1.05 a resolution. J Mol Biol. 2002 Jul 12;320(3):677-93. PMID:12096917
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