2QHX - JenaLib

Asym./Biol. Unit (Jmol Viewer)

Asym./Biol. Unit - sites (Jmol Viewer)

Title :   STRUCTURE OF PTERIDINE REDUCTASE FROM LEISHMANIA MAJOR COMPLEXED WITH A LIGAND

Authors :   F. Gibellini, K. Mcluskey, L. Tulloch, W. N. Hunter

Date :   03 Jul 07 (Deposition) - 25 Dec 07 (Release) - 09 Jun 09 (Revision)

Method :   X-RAY DIFFRACTION

Resolution :   2.61

Chains :   Asym./Biol. Unit : A,B,C,D

Keywords :   Oxidoreductase, Short-Chain Dehydrogenase/Reductase, Pteridine Reductase, Trypanosomatid, Pterin Salvage, Drug Resistance, Methotrexate Resistance, Enzyme Inhibitor, Nadp/Nadph (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )

Reference :   A. Cavazzuti, G. Paglietti, W. N. Hunter, F. Gamarro, S. Piras, M. Loriga, S. Allecca, P. Corona, K. Mcluskey, L. Tulloch, F. Gibellini, S. Ferrari, M. P. Costi
Discovery Of Potent Pteridine Reductase Inhibitors To Guide Antiparasite Drug Development.
Proc. Natl. Acad. Sci. Usa V. 105 1448 2008
PubMed-ID: 18245389 | Reference-DOI: 10.1073/PNAS.0704384105
(for further references see the PDB file header)

Molecule 1 - PTERIDINE REDUCTASE 1
	Chains	:	A, B, C, D
	EC Number	:	1.5.1.33
	Engineered	:	YES
	Expression System	:	ESCHERICHIA COLI BL21
	Expression System Plasmid	:	PET 15B
	Expression System Strain	:	BL21
	Expression System Taxid	:	511693
	Expression System Vector Type	:	PLASMID
	Gene	:	PTR1, HMTXR
	Organism Scientific	:	LEISHMANIA MAJOR
	Organism Taxid	:	5664
	Synonym	:	H REGION METHOTREXATE RESISTANCE PROTEIN

		1	2	3	4
Asymmetric/Biological Unit	:	A	B	C	D

Summary Information (see also Sequences/Alignments below)

Asymmetric/Biological Unit (3, 10)

No.	Name	Count	Type	Full Name
1	FE1	4	Ligand/Ion	METHYL 1-(4-{[(2,4-DIAMINOPTERIDIN-6-YL)METHYL](METHYL)AMINO}BENZOYL)PIPERIDINE-4-CARBOXYLATE
2	IOD	2	Ligand/Ion	IODIDE ION
3	NAP	4	Ligand/Ion	NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE

Asymmetric Unit (10, 10)

No.	Name	Evidence	Residues	Description
01	AC1	SOFTWARE	ASN A:68 , ASN B:68 , IOD B:1288 , HOH B:1443	BINDING SITE FOR RESIDUE IOD A 1289
02	AC2	SOFTWARE	ASN A:68 , IOD A:1289 , HOH A:1488 , ASN B:68	BINDING SITE FOR RESIDUE IOD B 1288
03	AC3	SOFTWARE	ARG A:17 , LEU A:18 , HIS A:36 , TYR A:37 , HIS A:38 , ARG A:39 , SER A:40 , ALA A:64 , ASP A:65 , LEU A:66 , ASN A:109 , ALA A:110 , SER A:111 , SER A:112 , ASP A:142 , MET A:179 , VAL A:180 , ASP A:181 , TYR A:194 , LYS A:198 , PRO A:224 , GLY A:225 , LEU A:226 , SER A:227 , FE1 A:1301 , HOH A:1303 , HOH A:1309 , HOH A:1322 , HOH A:1335 , HOH A:1344 , HOH A:1361 , HOH A:1362 , HOH A:1494	BINDING SITE FOR RESIDUE NAP A 1300
04	AC4	SOFTWARE	ARG A:17 , SER A:111 , PHE A:113 , ASP A:181 , LEU A:188 , TYR A:191 , TYR A:194 , LEU A:226 , LEU A:229 , MET A:233 , HIS A:241 , NAP A:1300 , HOH A:1387 , HOH A:1521 , HOH D:1394	BINDING SITE FOR RESIDUE FE1 A 1301
05	AC5	SOFTWARE	ARG B:17 , LEU B:18 , HIS B:36 , TYR B:37 , HIS B:38 , ARG B:39 , SER B:40 , ALA B:64 , ASP B:65 , LEU B:66 , ASN B:109 , ALA B:110 , SER B:111 , SER B:112 , ASP B:142 , MET B:179 , VAL B:180 , ASP B:181 , TYR B:194 , LYS B:198 , PRO B:224 , GLY B:225 , LEU B:226 , SER B:227 , FE1 B:1303 , HOH B:1321 , HOH B:1322 , HOH B:1326 , HOH B:1353 , HOH B:1358 , HOH B:1384 , HOH B:1389 , HOH B:1450 , HOH B:1466	BINDING SITE FOR RESIDUE NAP B 1302
06	AC6	SOFTWARE	ARG B:17 , SER B:111 , PHE B:113 , PRO B:115 , ASP B:181 , LEU B:188 , TYR B:191 , TYR B:194 , LEU B:229 , HIS B:241 , NAP B:1302 , HOH B:1431 , HOH B:1478	BINDING SITE FOR RESIDUE FE1 B 1303
07	AC7	SOFTWARE	ARG C:17 , LEU C:18 , HIS C:36 , TYR C:37 , HIS C:38 , ARG C:39 , SER C:40 , ALA C:64 , ASP C:65 , LEU C:66 , ASN C:109 , ALA C:110 , SER C:111 , SER C:112 , ASP C:142 , MET C:179 , VAL C:180 , ASP C:181 , TYR C:194 , LYS C:198 , PRO C:224 , GLY C:225 , LEU C:226 , SER C:227 , FE1 C:1305 , HOH C:1314 , HOH C:1321 , HOH C:1330 , HOH C:1354 , HOH C:1372 , HOH C:1389 , HOH C:1504	BINDING SITE FOR RESIDUE NAP C 1304
08	AC8	SOFTWARE	SER C:111 , PHE C:113 , TYR C:191 , TYR C:194 , LEU C:226 , NAP C:1304 , HOH C:1348 , HOH C:1486	BINDING SITE FOR RESIDUE FE1 C 1305
09	AC9	SOFTWARE	ARG D:17 , LEU D:18 , HIS D:36 , TYR D:37 , HIS D:38 , ARG D:39 , SER D:40 , ALA D:64 , ASP D:65 , LEU D:66 , ASN D:109 , ALA D:110 , SER D:111 , SER D:112 , ASP D:142 , MET D:179 , VAL D:180 , ASP D:181 , TYR D:194 , LYS D:198 , PRO D:224 , GLY D:225 , LEU D:226 , SER D:227 , FE1 D:1307 , HOH D:1322 , HOH D:1327 , HOH D:1333 , HOH D:1355 , HOH D:1385 , HOH D:1405	BINDING SITE FOR RESIDUE NAP D 1306
10	BC1	SOFTWARE	ARG D:17 , SER D:111 , PHE D:113 , TYR D:191 , TYR D:194 , LEU D:226 , NAP D:1306 , HOH D:1430	BINDING SITE FOR RESIDUE FE1 D 1307

(no "SS Bond" information available for 2QHX)

(no "Cis Peptide Bond" information available for 2QHX)

(no "SAP(SNP)/Variant" information available for 2QHX)

Asymmetric/Biological Unit (1, 4)

	PROSITE			UniProtKB		PDB
No.	ID	AC	Description	ID	Location	Count	Location
1	ADH_SHORT	PS00061	Short-chain dehydrogenases/reductases family signature.	PTR1_LEIMA	181-209	4	A:181-209 B:181-209 C:181-209 D:181-209

(no "Exon" information available for 2QHX)

Asymmetric/Biological Unit

Reformat:	Number of residues per line = ('0' or empty: single-line sequence representation)
	Number of residues per labelling interval =
	UniProt sequence: complete aligned part

Show mapping:	SCOP domains	CATH domains	Pfam domains	Secondary structure (by author)
	SAPs(SNPs)	PROSITE motifs	Exons
	(details for a mapped element are shown in a popup box when the mouse pointer rests over it)

Chain A from PDB  Type:PROTEIN  Length:264
 aligned with PTR1_LEIMA | Q01782 from UniProtKB/Swiss-Prot  Length:288

    Alignment length:284
                                    14        24        34        44        54        64        74        84        94       104       114       124       134       144       154       164       174       184       194       204       214       224       234       244       254       264       274       284    
           PTR1_LEIMA     5 TVPVALVTGAAKRLGRSIAEGLHAEGYAVCLHYHRSAAEANALSATLNARRPNSAITVQADLSNVATAPVSGADGSAPVTLFTRCAELVAACYTHWGRCDVLVNNASSFYPTPLLRNDEDGHEPCVGDREAMETATADLFGSNAIAPYFLIKAFAHRFAGTPAKHRGTNYSIINMVDAMTNQPLLGYTIYTMAKGALEGLTRSAALELAPLQIRVNGVGPGLSVLVDDMPPAVWEGHRSKVPLYQRDSSAAEVSDVVIFLCSSKAKYITGTCVKVDGGYSLTRA 288
               SCOP domains d2qhxa1 A:5-288 Dihydropteridin reductase (pteridine reductase)                                                                                                                                                                                                                              SCOP domains
               CATH domains 2qhxA00 A:5-288 NAD(P)-binding Rossmann-like Domain                                                                                                                                                                                                                                          CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeee....hhhhhhhhhhhhhh..eeeeee..hhhhhhhhhhhhhhhh...eeeee..........-------...hhhhhhhhhhhhhhhhhh...eeee............-------------hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh...eeeeee...........hhhhhhhhhhhhhhhhhhhhhhh...eeeeeeee.........hhhhhhhhhh.........hhhhhhhhhhhhhhhhhh.....eeee..hhhhh.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ADH_SHORT  PDB: A:181-209    ------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2qhx A   5 TVPVALVTGAAKRLGRSIAEGLHAEGYAVCLHYHRSAAEANALSATLNARRPNSAITVQADLSNVATAP-------APVTLFTRCAELVAACYTHWGRCDVLVNNASSFYPTPLLR-------------EAMETATADLFGSNAIAPYFLIKAFAHRVAGTPAKHRGTNYSIINMVDAMTNQPLLGYTIYTMAKGALEGLTRSAALELAPLQIRVNGVGPGLSVLVDDMPPAVWEGHRSKVPLYQRDSSAAEVSDVVIFLCSSKAKYITGTCVKVDGGYSLTRA 288
                                    14        24        34        44        54        64        |-      | 84        94       104       114     |   -       134       144       154       164       174       184       194       204       214       224       234       244       254       264       274       284    
                                                                                               73      81                                    120           134

Chain B from PDB  Type:PROTEIN  Length:265
 aligned with PTR1_LEIMA | Q01782 from UniProtKB/Swiss-Prot  Length:288

    Alignment length:284
                                    14        24        34        44        54        64        74        84        94       104       114       124       134       144       154       164       174       184       194       204       214       224       234       244       254       264       274       284    
           PTR1_LEIMA     5 TVPVALVTGAAKRLGRSIAEGLHAEGYAVCLHYHRSAAEANALSATLNARRPNSAITVQADLSNVATAPVSGADGSAPVTLFTRCAELVAACYTHWGRCDVLVNNASSFYPTPLLRNDEDGHEPCVGDREAMETATADLFGSNAIAPYFLIKAFAHRFAGTPAKHRGTNYSIINMVDAMTNQPLLGYTIYTMAKGALEGLTRSAALELAPLQIRVNGVGPGLSVLVDDMPPAVWEGHRSKVPLYQRDSSAAEVSDVVIFLCSSKAKYITGTCVKVDGGYSLTRA 288
               SCOP domains d2qhxb1 B:5-288 Dihydropteridin reductase (pteridine reductase)                                                                                                                                                                                                                              SCOP domains
               CATH domains 2qhxB00 B:5-288 NAD(P)-binding Rossmann-like Domain                                                                                                                                                                                                                                          CATH domains
               Pfam domains -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ...eeee....hhhhhhhhhhhhh...eeeeee..hhhhhhhhhhhhhhhh...eeeee..........------....hhhhhhhhhhhhhhhhhh...eeee............-------------hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....eeeee...........hhhhhhhhhhhhhhhhhhhhhhhhhh.eeeeeee.........hhhhhhhhhh.........hhhhhhhhhhhhhhhhhh.....eeee..hhhhh.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ADH_SHORT  PDB: B:181-209    ------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2qhx B   5 TVPVALVTGAAKRLGRSIAEGLHAEGYAVCLHYHRSAAEANALSATLNARRPNSAITVQADLSNVATAP------SAPVTLFTRCAELVAACYTHWGRCDVLVNNASSFYPTPLLR-------------EAMETATADLFGSNAIAPYFLIKAFAHRVAGTPAKHRGTNYSIINMVDAMTNQPLLGYTIYTMAKGALEGLTRSAALELAPLQIRVNGVGPGLSVLVDDMPPAVWEGHRSKVPLYQRDSSAAEVSDVVIFLCSSKAKYITGTCVKVDGGYSLTRA 288
                                    14        24        34        44        54        64        |-     |  84        94       104       114     |   -       134       144       154       164       174       184       194       204       214       224       234       244       254       264       274       284    
                                                                                               73     80                                     120           134

Chain C from PDB  Type:PROTEIN  Length:254
 aligned with PTR1_LEIMA | Q01782 from UniProtKB/Swiss-Prot  Length:288

    Alignment length:283
                                    15        25        35        45        55        65        75        85        95       105       115       125       135       145       155       165       175       185       195       205       215       225       235       245       255       265       275       285   
           PTR1_LEIMA     6 VPVALVTGAAKRLGRSIAEGLHAEGYAVCLHYHRSAAEANALSATLNARRPNSAITVQADLSNVATAPVSGADGSAPVTLFTRCAELVAACYTHWGRCDVLVNNASSFYPTPLLRNDEDGHEPCVGDREAMETATADLFGSNAIAPYFLIKAFAHRFAGTPAKHRGTNYSIINMVDAMTNQPLLGYTIYTMAKGALEGLTRSAALELAPLQIRVNGVGPGLSVLVDDMPPAVWEGHRSKVPLYQRDSSAAEVSDVVIFLCSSKAKYITGTCVKVDGGYSLTRA 288
               SCOP domains d2qhxc_ C: automated matches                                                                                                                                                                                                                                                                SCOP domains
               CATH domains 2qhxC00 C:6-288 NAD(P)-binding Rossmann-like Domain                                                                                                                                                                                                                                         CATH domains
               Pfam domains ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Pfam domains
         Sec.struct. author ..eeee....hhhhhhhhhhhhhh..eeeeee..hhhhhhhhhhhhhhhh...eeeee..........-------...hhhhhhhhhhhhhhhhhh...eeee............--------------hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....eeeee...........hhhhhhhhhhhhhhhhhhhhhhhhhh.eeeeeee......--------..hhhhh.......hhhhhhhhhhhhhhhhhh.....eeee..hhhhh.. Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ADH_SHORT  PDB: C:181-209    ------------------------------------------------------------------------------- PROSITE
                 Transcript ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2qhx C   6 VPVALVTGAAKRLGRSIAEGLHAEGYAVCLHYHRSAAEANALSATLNARRPNSAITVQADLSNVATAP-------APVTLFTRCAELVAACYTHWGRCDVLVNNASSFYPTPLLR--------------AMETATADLFGSNAIAPYFLIKAFAHRVAGTPAKHRGTNYSIINMVDAMTNQPLLGYTIYTMAKGALEGLTRSAALELAPLQIRVNGVGPGLSVLV--------EGHRSKVPLYQRDSSAAEVSDVVIFLCSSKAKYITGTCVKVDGGYSLTRA 288
                                    15        25        35        45        55        65       | -     |  85        95       105       115    |    -       135       145       155       165       175       185       195       205       215       225    |    -   |   245       255       265       275       285   
                                                                                              73      81                                    120            135                                                                                            230      239

Chain D from PDB  Type:PROTEIN  Length:258
 aligned with PTR1_LEIMA | Q01782 from UniProtKB/Swiss-Prot  Length:288

    Alignment length:284
                                    14        24        34        44        54        64        74        84        94       104       114       124       134       144       154       164       174       184       194       204       214       224       234       244       254       264       274       284    
           PTR1_LEIMA     5 TVPVALVTGAAKRLGRSIAEGLHAEGYAVCLHYHRSAAEANALSATLNARRPNSAITVQADLSNVATAPVSGADGSAPVTLFTRCAELVAACYTHWGRCDVLVNNASSFYPTPLLRNDEDGHEPCVGDREAMETATADLFGSNAIAPYFLIKAFAHRFAGTPAKHRGTNYSIINMVDAMTNQPLLGYTIYTMAKGALEGLTRSAALELAPLQIRVNGVGPGLSVLVDDMPPAVWEGHRSKVPLYQRDSSAAEVSDVVIFLCSSKAKYITGTCVKVDGGYSLTRA 288
               SCOP domains d2qhxd1 D:5-288 Dihydropteridin reductase (pteridine reductase)                                                                                                                                                                                                                              SCOP domains
               CATH domains 2qhxD00 D:5-288 NAD(P)-binding Rossmann-like Domain                                                                                                                                                                                                                                          CATH domains
           Pfam domains (1) ---------------------------------------------------------------------       ----------------------------------------           -------------------------------adh_short_C2-2qhxD01 D:163-284                                                                                            ---- Pfam domains (1)
           Pfam domains (2) ---------------------------------------------------------------------       ----------------------------------------           -------------------------------adh_short_C2-2qhxD02 D:163-284                                                                                            ---- Pfam domains (2)
           Pfam domains (3) ---------------------------------------------------------------------       ----------------------------------------           -------------------------------adh_short_C2-2qhxD03 D:163-284                                                                                            ---- Pfam domains (3)
           Pfam domains (4) ---------------------------------------------------------------------       ----------------------------------------           -------------------------------adh_short_C2-2qhxD04 D:163-284                                                                                            ---- Pfam domains (4)
         Sec.struct. author ...eeee....hhhhhhhhhhhhh...eeeeee..hhhhhhhhhhhhhhhh...eeeee..........-------...hhhhhhhhhhhhhhhhhh...eeee............-----------..hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh....eeeee...........hhhhhhhhhhhhhhhhhhhhhhhhhh.eeeeeee......--------..hhhhh.......hhhhhhhhhhhhhhhhhh.....eeee..hhhhh.. Sec.struct. author
                 SAPs(SNPs) -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- SAPs(SNPs)
                    PROSITE --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ADH_SHORT  PDB: D:181-209    ------------------------------------------------------------------------------- PROSITE
                 Transcript -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Transcript
                 2qhx D   5 TVPVALVTGAAKRLGRSIAEGLHAEGYAVCLHYHRSAAEANALSATLNARRPNSAITVQADLSNVATAP-------APVTLFTRCAELVAACYTHWGRCDVLVNNASSFYPTPLLR-----------DREAMETATADLFGSNAIAPYFLIKAFAHRVAGTPAKHRGTNYSIINMVDAMTNQPLLGYTIYTMAKGALEGLTRSAALELAPLQIRVNGVGPGLSVLV--------EGHRSKVPLYQRDSSAAEVSDVVIFLCSSKAKYITGTCVKVDGGYSLTRA 288
                                    14        24        34        44        54        64        |-      | 84        94       104       114     |   -       134       144       154       164       174       184       194       204       214       224     |   -    |  244       254       264       274       284    
                                                                                               73      81                                    120         132                                                                                               230      239

Legend:		→ Mismatch	(orange background)
	-	→ Gap	(green background, '-', border residues have a numbering label)
		→ Modified Residue	(blue background, lower-case, 'x' indicates undefined single-letter code, labelled with number + name)
	x	→ Chemical Group	(purple background, 'x', labelled with number + name, e.g. ACE or NH2)
	extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '\|'

Asymmetric/Biological Unit

Classes(

)

Folds(

)

Superfamilies( (-)

)

Families(

)

Protein Domains( (-)

)

Organisms( (-)

)

Class: Alpha and beta proteins (a/b) (23833)

Fold: NAD(P)-binding Rossmann-fold domains (1604)

Superfamily: NAD(P)-binding Rossmann-fold domains (1604)

Family: automated matches (447)

Protein domain: automated matches (447)

Leishmania major [TaxId: 5664] (2)

d2qhxc_

Family: Tyrosine-dependent oxidoreductases (503)

Protein domain: Dihydropteridin reductase (pteridine reductase) (24)

Leishmania major [TaxId: 5664] (10)

2a	d2qhxa1	A:5-288
2b	d2qhxb1	B:5-288
2c	d2qhxd1	D:5-288

Asymmetric/Biological Unit

Classes(

)

Architectures( (-)

)

Topologies( (-)

)

Homologous Superfamilies( (-)

)

Organisms( (-)

)

Class: Alpha Beta (26913)

Architecture: 3-Layer(aba) Sandwich (12045)

Topology: Rossmann fold (7312)

Homologous Superfamily: NAD(P)-binding Rossmann-like Domain (1244)

Leishmania major. Organism_taxid: 5664. (3)

1a	2qhxC00	C:6-288
1b	2qhxD00	D:5-288
1c	2qhxA00	A:5-288
1d	2qhxB00	B:5-288

Asymmetric/Biological Unit

Clans(

)

Families(

)

Organisms( (-)

)

Clan: NADP_Rossmann (1239)

Family: adh_short_C2 (98)

Leishmania major (1)

1a	adh_short_C2-2qhxD01	D:163-284
1b	adh_short_C2-2qhxD02	D:163-284
1c	adh_short_C2-2qhxD03	D:163-284
1d	adh_short_C2-2qhxD04	D:163-284

Asymmetric/Biological Unit(hide GO term definitions)

Chain A,B,C,D (PTR1_LEIMA | Q01782)

molecular function
	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.
	GO:0047040	pteridine reductase activity	Catalysis of the reaction: 5,6,7,8-tetrahydrobiopterin + 2 NADP(+) = biopterin + 2 H(+) + 2 NADPH.
	GO:0004799	thymidylate synthase activity	Catalysis of the reaction: 5,10-methylenetetrahydrofolate + dUMP = 7,8-dihydrofolate + thymidylate.
biological process
	GO:0034599	cellular response to oxidative stress	Any process that results in a change in state or activity of a cell (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of oxidative stress, a state often resulting from exposure to high levels of reactive oxygen species, e.g. superoxide anions, hydrogen peroxide (H2O2), and hydroxyl radicals.
	GO:0032259	methylation	The process in which a methyl group is covalently attached to a molecule.
	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:0019889	pteridine metabolic process	The chemical reactions and pathways involving pteridine, pyrazino(2,3-dipyrimidine), the parent structure of pterins and the pteroyl group.
	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:0006729	tetrahydrobiopterin biosynthetic process	The chemical reactions and pathways resulting in the formation of tetrahydrobiopterin, the reduced form of biopterin (2-amino-4-hydroxy-6-(1,2-dihydroxypropyl)-pteridine). It functions as a hydroxylation coenzyme, e.g. in the conversion of phenylalanine to tyrosine.

Asymmetric/Biological Unit
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	Cis Peptide Bonds
(no "Cis Peptide Bonds" information available for 2qhx)

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	2qhx
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	PTR1_LEIMA \| Q01782
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	PTR1_LEIMA \| Q01782
		Protein Disorder Prediction	:	DisEMBL \| FoldIndex \| GLOBPLOT (for more information see DisProt)

UniProtKB/Swiss-Prot
	PTR1_LEIMA \| Q01782	:	1e7w 1e92 1w0c 2bf7 2bfa 2bfm 2bfo 2bfp 3h4v 5l42 5l4n

1e92	CRYSTAL STRUCTURE OF THE SAME PROTEIN COMPLEXED WITH NADP+ AND DIHYDROBIOPTERIN
1w0c	CRYSTAL STRUCTURE OF THE NADP TERNARY COMPLEX
2atd	CRYSTAL STRUCTURE OF THE SAME PROTEIN IN COMPLEX WITH NADP AND BIOPTERIN
2bfa	CRYSTAL STRUCTURE OF THE SAME PROTEIN IN COMPLEX WITH NADP AND CB3717
2bfm	CRYSTAL STRUCTURE OF THE SAME PROTEIN IN COMPLEX WITH NADP AND TRIMETHOPRIM
2bfp	CRYSTAL STRUCTURE OF THE SAME PROTEIN IN COMPLEX WITH NADP AND TETRAHYDROBIOPTERIN

Description

Compounds

Structural Features

Chains, Units

Ligands, Modified Residues, Ions (3, 10)

Sites (10, 10)

SS Bonds (0, 0)

Cis Peptide Bonds (0, 0)

Sequence-Structure Mapping

SAPs(SNPs)/Variants (0, 0)

PROSITE Motifs (1, 4)

Exons (0, 0)

Sequences/Alignments

Classification and Annotation

SCOP Domains (2, 4)

CATH Domains (1, 4)

Pfam Domains (1, 4)

Gene Ontology (9, 9)

Visualization

Interactive Views

Still Images

Databases and Analysis Tools

Databases

Analysis Tools

Related Entries

Entries Sharing at Least One Protein Chain (UniProt ID)

Related Entries Specified in the PDB File