2GQV - JenaLib

Title :   HIGH-RESOLUTION STRUCTURE OF A PLASMID-ENCODED DIHYDROFOLATE REDUCTASE: PENTAGONAL NETWORK OF WATER MOLECULES IN THE D2-SYMMETRIC ACTIVE SITE

Authors :   N. Narayana

Date :   22 Apr 06 (Deposition) - 24 Apr 07 (Release) - 24 Feb 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   1.10

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

Keywords :   Anisotropic Refinement, Atomic-Resolution Structure, Folate Metabolism, Plasmid-Encoded R67 Dhfr, Tmp-Resistant Dhfr, Oxidoreductase (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   N. Narayana
High-Resolution Structure Of A Plasmid-Encoded Dihydrofolate Reductase: Pentagonal Network Of Water Molecules In The D(2)-Symmetric Active Site.
Acta Crystallogr. , Sect. D V. 62 695 2006
PubMed-ID: 16790925 | Reference-DOI: 10.1107/S0907444906014764
(for further references see the PDB file header)

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (0, 0)

Sites (0, 0)

SS Bonds (0, 0)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

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Sequences/Alignments

Asymmetric Unit

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Chain A from PDB  Type:PROTEIN  Length:59
 aligned with DYR21_ECOLX | P00383 from UniProtKB/Swiss-Prot  Length:78

    Alignment length:59
                                    29        39        49        59        69         
           DYR21_ECOLX   20 SNATFGMGDRVRKKSGAAWQGQIVGWYCTNLTPEGYAVESEAHPGSVQIYPVAALERIN 78
               SCOP domains d2gqva_ A: automated matches                                SCOP domains
               CATH domains 2gqvA00 A:20-78  [code=2.30.30.60, no name defined]         CATH domains
               Pfam domains ----------------------------------------------------------- Pfam domains
         Sec.struct. author .........eeee......eeeeeeee.......eeeeee......eeeee...eee.. Sec.struct. author
                 SAPs(SNPs) ----------------------------------------------------------- SAPs(SNPs)
                    PROSITE ----------------------------------------------------------- PROSITE
                 Transcript ----------------------------------------------------------- Transcript
                  2gqv A 20 SNATFGMGDRVRKKSGAAWQGQIVGWYCTNLTPEGYAVESEAHPGSVQIYPVAALERIN 78
                                    29        39        49        59        69

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Classification and Annotation

SCOP Domains (1, 1)

CATH Domains (1, 1)

Pfam Domains (0, 0)

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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