2GB0

Monomeric sarcosine oxidase: structure of a covalently flavinylated amine oxidizing enzyme

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	d2gb0a1	Alpha and beta proteins (a/b)	FAD/NAD(P)-binding domain	FAD/NAD(P)-binding domain	FAD-linked reductases, N-terminal domain	Sarcosine oxidase	(Bacillus sp. B-0618 ) [TaxId: 69000 ],	SCOPe (2.08)
A	d2gb0a2	Alpha and beta proteins (a+b)	FAD-linked reductases, C-terminal domain	FAD-linked reductases, C-terminal domain	D-aminoacid oxidase-like	Sarcosine oxidase	(Bacillus sp. B-0618 ) [TaxId: 69000 ],	SCOPe (2.08)
B	d2gb0b1	Alpha and beta proteins (a/b)	FAD/NAD(P)-binding domain	FAD/NAD(P)-binding domain	FAD-linked reductases, N-terminal domain	Sarcosine oxidase	(Bacillus sp. B-0618 ) [TaxId: 69000 ],	SCOPe (2.08)
B	d2gb0b2	Alpha and beta proteins (a+b)	FAD-linked reductases, C-terminal domain	FAD-linked reductases, C-terminal domain	D-aminoacid oxidase-like	Sarcosine oxidase	(Bacillus sp. B-0618 ) [TaxId: 69000 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Flavoreductase-like	8057739	3000055	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Flavoreductase-like	8057739	3000055	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	solA	e2gb0A1	A: a+b two layers	X: FAD-linked reductases, C-terminal domain-like	H: FAD-linked reductases-C (From Topology)	T: FAD-linked reductases-C	F: solA	ECOD (1.6)
A	DAO_1st	e2gb0A2	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: FAD/NAD(P)-binding domain	F: DAO_1st	ECOD (1.6)
B	solA	e2gb0B1	A: a+b two layers	X: FAD-linked reductases, C-terminal domain-like	H: FAD-linked reductases-C (From Topology)	T: FAD-linked reductases-C	F: solA	ECOD (1.6)
B	DAO_1st	e2gb0B2	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: FAD/NAD(P)-binding domain	F: DAO_1st	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.50.50.60	Alpha Beta	3-Layer(bba) Sandwich	FAD/NAD(P)-binding domain	FAD/NAD(P)-binding domain	CATH (4.3.0)
A	3.30.9.10	Alpha Beta	2-Layer Sandwich	D-Amino Acid Oxidase	Chain A, domain 2	CATH (4.3.0)
B	3.50.50.60	Alpha Beta	3-Layer(bba) Sandwich	FAD/NAD(P)-binding domain	FAD/NAD(P)-binding domain	CATH (4.3.0)
B	3.30.9.10	Alpha Beta	2-Layer Sandwich	D-Amino Acid Oxidase	Chain A, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01266	FAD dependent oxidoreductase (DAO)	FAD dependent oxidoreductase	This family includes various FAD dependent oxidoreductases: Glycerol-3-phosphate dehydrogenase EC:1.1.99.5, Sarcosine oxidase beta subunit EC:1.5.3.1, D-alanine oxidase EC:1.4.99.1, D-aspartate oxidase EC:1.4.3.1.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Monomeric sarcosine oxidase	oxidoreductase activity oxidoreductase activity, acting on the CH-NH group of donors, oxygen as acceptor sarcosine oxidase activity oxidoreductase activity, acting on the CH-NH group of donors catalytic activity flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding organic cyclic compound binding anion binding nucleotide binding heterocyclic compound binding small molecule binding	-	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR045170	MTOX family	Family
A, B	IPR006281	Sarcosine oxidase, monomeric	Family
A, B	IPR006076	FAD dependent oxidoreductase	Domain
A, B	IPR036188	FAD/NAD(P)-binding domain superfamily	Homologous Superfamily

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

Chains	Enzyme Name	Description	Catalytic Residues
B	sarcosine oxidase M-CSA #113	Monomeric sarcosine oxidase (MSOX) catalyses the oxidative demethylation of sarcosine (N-methylglycine) to form glycine and formaldehyde. Sarcosine is a common soil metabolite that can act as the sole source of carbon and energy for many microorganisms capable of expressing sarcosine oxidase. MSOX is part of a family of enzymes which contain flavin (FAD covalently attached to the protein via Cys315) and catalyse the oxidation of various secondary and tertiary amino acids. Despite the vast amount of research that has been done on these enzymes, the exact mechanism remains elusive. There are three proposals: polar, hydride and single electron transfer. To date, there is little evidence to suggest one over the other. The mechanism by which Cys315 becomes attached to FAD involves His45 and Arg49 [PMID:10368302] and is thought to be autocatalytic. The formation of the covalent FAD adduct is not shown in this entry.	Defined by 7 residues: HIS:B-45THR:B-48ARG:B-49LYS:B-265HIS:B-269CYS:B-315LYS:B-348 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 1.5.3.1 (PDB Primary Data) Search M-CSA Motif + EC 1.5.3.1

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.