1VIE - JenaLib

Title :   STRUCTURE OF DIHYDROFOLATE REDUCTASE

Authors :   N. Narayana, D. A. Matthews, E. E. Howell, N. -H. Xuong

Date :   03 Oct 96 (Deposition) - 22 Oct 97 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.70

Chains :   Asym. Unit : A
Biol. Unit 1: A  (4x)

Keywords :   Oxidoreductase, Nadp, Trimethoprim Resistance, Methotrexate Resistance, One-Carbon Metabolism, Plasmid (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   N. Narayana, D. A. Matthews, E. E. Howell, X. Nguyen-Huu
A Plasmid-Encoded Dihydrofolate Reductase From Trimethoprim-Resistant Bacteria Has A Novel D2-Symmetric Active Site.
Nat. Struct. Biol. V. 2 1018 1995
PubMed-ID: 7583655 | Reference-DOI: 10.1038/NSB1195-1018
(for further references see the PDB file header)

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (0, 0)

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Sequences/Alignments

Asymmetric Unit

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Chain A from PDB  Type:PROTEIN  Length:60
 aligned with DYR21_ECOLX | P00383 from UniProtKB/Swiss-Prot  Length:78

    Alignment length:60
                                    28        38        48        58        68        78
           DYR21_ECOLX   19 PSNATFGMGDRVRKKSGAAWQGQIVGWYCTNLTPEGYAVESEAHPGSVQIYPVAALERIN 78
               SCOP domains d1viea_ A: R67 dihydrofolate reductase                       SCOP domains
               CATH domains 1vieA00 A:19-78  [code=2.30.30.60, no name defined]          CATH domains
               Pfam domains DHFR_2-1vieA01 A:19-78                                       Pfam domains
         Sec.struct. author ..........eeee......eeeeeeee.......eeeeee......eeeeehhheee.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------ Transcript
                  1vie A 19 PSNATFGMGDRVRKKSGAAWQGQIVGWYCTNLTPEGYAVESEAHPGSVQIYPVAALERIN 78
                                    28        38        48        58        68        78

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Classification and Annotation

SCOP Domains (1, 1)

CATH Domains (1, 1)

Pfam Domains (1, 1)

Gene Ontology (8, 8)

Asymmetric Unit(hide GO term definitions)

Chain A (DYR21_ECOLX | P00383)

molecular function
	GO:0004146	dihydrofolate reductase activity	Catalysis of the reaction: 5,6,7,8-tetrahydrofolate + NADP+ = 7,8-dihydrofolate + NADPH + H+.
	GO:0016491	oxidoreductase activity	Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced.
biological process
	GO:0006730	one-carbon metabolic process	The chemical reactions and pathways involving the transfer of one-carbon units in various oxidation states.
	GO:0055114	oxidation-reduction process	A metabolic process that results in the removal or addition of one or more electrons to or from a substance, with or without the concomitant removal or addition of a proton or protons.
	GO:0046677	response to antibiotic	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an antibiotic stimulus. An antibiotic is a chemical substance produced by a microorganism which has the capacity to inhibit the growth of or to kill other microorganisms.
	GO:0042493	response to drug	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a drug stimulus. A drug is a substance used in the diagnosis, treatment or prevention of a disease.
	GO:0031427	response to methotrexate	Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a methotrexate stimulus. Methotrexate is 4-amino-10-methylformic acid, a folic acid analogue that is a potent competitive inhibitor of dihydrofolate reductase.
	GO:0046654	tetrahydrofolate biosynthetic process	The chemical reactions and pathways resulting in the formation of tetrahydrofolate, 5,6,7,8-tetrahydrofolic acid, a folate derivative bearing additional hydrogens on the pterin group.

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