2C7V

Structure of Trypanosoma brucei pteridine reductase (PTR1) in ternary complex with cofactor and the antifolate methotrexate

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2c7va_	Alpha and beta proteins (a/b)	NAD(P)-binding Rossmann-fold domains	NAD(P)-binding Rossmann-fold domains	Tyrosine-dependent oxidoreductases	automated matches	(Trypanosoma brucei brucei ) [TaxId: 5702 ],	SCOPe (2.08)
B	d2c7vb_	Alpha and beta proteins (a/b)	NAD(P)-binding Rossmann-fold domains	NAD(P)-binding Rossmann-fold domains	Tyrosine-dependent oxidoreductases	automated matches	(Trypanosoma brucei brucei ) [TaxId: 5702 ],	SCOPe (2.08)
C	d2c7vc_	Alpha and beta proteins (a/b)	NAD(P)-binding Rossmann-fold domains	NAD(P)-binding Rossmann-fold domains	Tyrosine-dependent oxidoreductases	automated matches	(Trypanosoma brucei brucei ) [TaxId: 5702 ],	SCOPe (2.08)
D	d2c7vd_	Alpha and beta proteins (a/b)	NAD(P)-binding Rossmann-fold domains	NAD(P)-binding Rossmann-fold domains	Tyrosine-dependent oxidoreductases	automated matches	(Trypanosoma brucei brucei ) [TaxId: 5702 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	SDR-like	8066982	3000038	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	SDR-like	8066982	3000038	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	SDR-like	8066982	3000038	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	SDR-like	8066982	3000038	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	adh_short_C2	e2c7vA1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: adh_short_C2	ECOD (1.6)
B	adh_short_C2	e2c7vB1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: adh_short_C2	ECOD (1.6)
C	adh_short_C2	e2c7vC1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: adh_short_C2	ECOD (1.6)
D	adh_short_C2	e2c7vD1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: adh_short_C2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
B	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
C	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
D	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF13561	Enoyl-(Acyl carrier protein) reductase (adh_short_C2)	Enoyl-(Acyl carrier protein) reductase	This domain is found in Enoyl-(Acyl carrier protein) reductases.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	PTERIDINE REDUCTASE	binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound binding small molecule binding oxidoreductase activity oxidoreductase activity, acting on the CH-NH group of donors, NAD or NADP as acceptor pteridine reductase activity oxidoreductase activity, acting on the CH-NH group of donors catalytic activity	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
A, B, C, D	IPR002347	Short-chain dehydrogenase/reductase SDR	Family
A, B, C, D	IPR014058	Pteridine reductase	Family
A, B, C, D	IPR020904	Short-chain dehydrogenase/reductase, conserved site	Conserved Site

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	pteridine reductase M-CSA #237	Pteridine reductase (TbPTR1), isolated from Trypanosoma brucei, is an NADPH-dependent short-chain reductase. TbPTR1 has broad specificity and can catalyse the reduction of biopterin to 5,6,7,8-tetrahydrobiopterin (THB) and folate to tetrahydrofolate. Both these reactants can be reduced from the oxidised or dihydro-state since the mechanism is a two step reduction by two molecules of NADPH. These reactions are important for the salvage of pteridines from the host and so TbPTR1 is a potential drug target for the treatment of African trypanosomiasis. TbPTR1 is a member of the Short-chain dehydrogenase/reductase (SDR) superfamily.	Defined by 3 residues: ARG:A-14ASP:A-161TYR:A-174 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 1.5.1.33 (PDB Primary Data) Search M-CSA Motif + EC 1.5.1.33

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.