3QD9

C72S/C353S mutant of Trypanosoma brucei QSOX containing an interdomain disulfide

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF04777,PF22220	e3qd9A5	A: alpha bundles	X: Four-helical up-and-down bundle	H: FAD-dependent thiol oxidase (From Topology)	T: FAD-dependent thiol oxidase	F: PF04777,PF22220	ECOD (1.6)
A	PF00085	e3qd9A6	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: PF00085	ECOD (1.6)
B	PF04777,PF22220	e3qd9B5	A: alpha bundles	X: Four-helical up-and-down bundle	H: FAD-dependent thiol oxidase (From Topology)	T: FAD-dependent thiol oxidase	F: PF04777,PF22220	ECOD (1.6)
B	PF00085	e3qd9B6	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: PF00085	ECOD (1.6)
C	PF04777,PF22220	e3qd9C5	A: alpha bundles	X: Four-helical up-and-down bundle	H: FAD-dependent thiol oxidase (From Topology)	T: FAD-dependent thiol oxidase	F: PF04777,PF22220	ECOD (1.6)
C	PF00085	e3qd9C6	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: PF00085	ECOD (1.6)
D	PF04777,PF22220	e3qd9D1	A: alpha bundles	X: Four-helical up-and-down bundle	H: FAD-dependent thiol oxidase (From Topology)	T: FAD-dependent thiol oxidase	F: PF04777,PF22220	ECOD (1.6)
D	PF00085	e3qd9D2	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: PF00085	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.30.10	Alpha Beta	3-Layer(aba) Sandwich	Glutaredoxin	Glutaredoxin	CATH (4.3.0)
B	3.40.30.10	Alpha Beta	3-Layer(aba) Sandwich	Glutaredoxin	Glutaredoxin	CATH (4.3.0)
C	3.40.30.10	Alpha Beta	3-Layer(aba) Sandwich	Glutaredoxin	Glutaredoxin	CATH (4.3.0)
D	3.40.30.10	Alpha Beta	3-Layer(aba) Sandwich	Glutaredoxin	Glutaredoxin	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF22220	Quiescin sulphydryl oxidase pseudo-Erv domain (QSOX_pErv)	Quiescin sulphydryl oxidase pseudo-Erv domain	Quiescin sulphydryl oxidase (QSOX) family of enzymes is the only known example of conserved concatenation of disulphide-generating and disulphide-transferring modules within a single polypeptide. Formation and transfer of disulphide bonds in QSOX are ...	Quiescin sulphydryl oxidase (QSOX) family of enzymes is the only known example of conserved concatenation of disulphide-generating and disulphide-transferring modules within a single polypeptide. Formation and transfer of disulphide bonds in QSOX are mediated by redox-active cysteine pairs in a canonical Cys-X-X-Cys pattern. One of these pair is in the N-terminal thioredoxin-like domain (Trx1). Another is in the C-terminal flavin adenine dinucleotide (FAD)-binding domain (Erv) related to the mitochondrial enzyme Erv1. The middle domain, the so-called pseudo-Erv domain, bridges the Trx1 and Erv domains and is structurally similar to the Erv domain [1].	Domain
A, B, C, D	PF00085	Thioredoxin (Thioredoxin)	Thioredoxin	Thioredoxins are small enzymes that participate in redox reactions, via the reversible oxidation of an active centre disulfide bond. Some members with only the active site are not separated from the noise.	Domain
A, B, C, D	PF04777	Erv1 / Alr family (Evr1_Alr)	Erv1 / Alr family	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	QSOX from Trypanosoma brucei (TbQSOX)	oxidoreductase activity, acting on a sulfur group of donors disulfide oxidoreductase activity oxidoreductase activity oxidoreductase activity, acting on a sulfur group of donors, oxygen as acceptor thiol oxidase activity catalytic activity binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound binding small molecule binding isomerase activity intramolecular oxidoreductase activity oxidoreductase activity, acting on a sulfur group of donors disulfide oxidoreductase activity oxidoreductase activity oxidoreductase activity, acting on a sulfur group of donors, oxygen as acceptor thiol oxidase activity catalytic activity binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound binding small molecule binding isomerase activity intramolecular oxidoreductase activity catalytic activity, acting on a protein intramolecular oxidoreductase activity, transposing S-S bonds protein disulfide isomerase activity protein-disulfide reductase activity flavin-dependent sulfhydryl oxidase activity	organonitrogen compound metabolic process cellular biosynthetic process cellular metabolic process primary metabolic process gene expression macromolecule biosynthetic process protein maturation protein folding biosynthetic process metabolic process cellular process protein metabolic process macromolecule metabolic process	membrane cellular anatomical entity extracellular region extracellular space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR036774	ERV/ALR sulfhydryl oxidase domain superfamily	Homologous Superfamily
A, B, C, D	IPR013766	Thioredoxin domain	Domain
A, B, C, D	IPR039798	Sulfhydryl oxidase	Family
A, B, C, D	IPR017937	Thioredoxin, conserved site	Conserved Site
A, B, C, D	IPR017905	ERV/ALR sulfhydryl oxidase domain	Domain
A, B, C, D	IPR036249	Thioredoxin-like superfamily	Homologous Superfamily

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 R01GM133198.