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1dhf

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Revision as of 10:33, 16 October 2019

CRYSTAL STRUCTURES OF RECOMBINANT HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH FOLATE AND 5-DEAZOFOLATE

Structural highlights

1dhf is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Activity:	Dihydrofolate reductase, with EC number 1.5.1.3
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

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.

Publication Abstract from PubMed

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.

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:2248959^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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
↑ Davies JF 2nd, Delcamp TJ, Prendergast NJ, Ashford VA, Freisheim JH, Kraut J. Crystal structures of recombinant human dihydrofolate reductase complexed with folate and 5-deazafolate. Biochemistry. 1990 Oct 9;29(40):9467-79. PMID:2248959

1 Structural highlights
2 Disease
3 Function
4 Evolutionary Conservation
5 Publication Abstract from PubMed
6 See Also
7 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1dhf"

@@ Line 1: / Line 1: @@
 ==CRYSTAL STRUCTURES OF RECOMBINANT HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH FOLATE AND 5-DEAZOFOLATE==
-<StructureSection load='1dhf' size='340' side='right' caption='[[1dhf]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
+<StructureSection load='1dhf' size='340' side='right'caption='[[1dhf]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1dhf]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. 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 [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1DHF FirstGlance]. <br>
@@ Line 16: / Line 16: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dh/1dhf_consurf.spt"</scriptWhenChecked>
+    <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>
@@ Line 31: / Line 31: @@
 </div>
 <div class="pdbe-citations 1dhf" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Dihydrofolate reductase 3D structures|Dihydrofolate reductase 3D structures]]
 == References ==
 <references/>
@@ Line 37: / Line 40: @@
 [[Category: Dihydrofolate reductase]]
 [[Category: Human]]
+[[Category: Large Structures]]
 [[Category: /II, J F.Davies]]
 [[Category: Kraut, J]]
 [[Category: Oxido-reductase]]
 [[Category: Oxidoreductase]]

1dhf

From Proteopedia

Revision as of 10:33, 16 October 2019

CRYSTAL STRUCTURES OF RECOMBINANT HUMAN DIHYDROFOLATE REDUCTASE COMPLEXED WITH FOLATE AND 5-DEAZOFOLATE

Structural highlights

Disease

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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