Annotations: 5OHX

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	F_UNCLASSIFIED	e5ohxA2	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: F_UNCLASSIFIED	ECOD (1.6)
A	PF00291	e5ohxA3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Tryptophan synthase beta subunit-like PLP-dependent enzymes (From Topology)	T: Tryptophan synthase beta subunit-like PLP-dependent enzymes	F: PF00291	ECOD (1.6)
B	F_UNCLASSIFIED	e5ohxB2	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF00291	e5ohxB3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Tryptophan synthase beta subunit-like PLP-dependent enzymes (From Topology)	T: Tryptophan synthase beta subunit-like PLP-dependent enzymes	F: PF00291	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.1100	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)
B	3.40.50.1100	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00291	Pyridoxal-phosphate dependent enzyme (PALP)	Pyridoxal-phosphate dependent enzyme	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Cystathionine beta-synthase	vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding organic cyclic compound binding anion binding heterocyclic compound binding small molecule binding cystathionine beta-synthase activity hydro-lyase activity lyase activity catalytic activity carbon-oxygen lyase activity vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding organic cyclic compound binding anion binding heterocyclic compound binding small molecule binding cystathionine beta-synthase activity hydro-lyase activity lyase activity catalytic activity carbon-oxygen lyase activity tetrapyrrole binding heme binding cation binding metal ion binding	serine family amino acid metabolic process oxoacid metabolic process cellular biosynthetic process sulfur amino acid metabolic process cysteine biosynthetic process via cystathionine organonitrogen compound biosynthetic process amino acid metabolic process organic acid biosynthetic process organic acid metabolic process alpha-amino acid metabolic process carboxylic acid biosynthetic process cysteine biosynthetic process organic substance metabolic process organic substance biosynthetic process serine family amino acid metabolic process oxoacid metabolic process cellular biosynthetic process sulfur amino acid metabolic process cysteine biosynthetic process via cystathionine organonitrogen compound biosynthetic process amino acid metabolic process organic acid biosynthetic process organic acid metabolic process alpha-amino acid metabolic process carboxylic acid biosynthetic process cysteine biosynthetic process organic substance metabolic process organic substance biosynthetic process small molecule metabolic process sulfur compound metabolic process organonitrogen compound metabolic process small molecule biosynthetic process cellular metabolic process carboxylic acid metabolic process primary metabolic process L-amino acid biosynthetic process L-amino acid metabolic process cysteine metabolic process proteinogenic amino acid metabolic process amino acid biosynthetic process sulfur compound biosynthetic process biosynthetic process proteinogenic amino acid biosynthetic process metabolic process cellular process serine family amino acid biosynthetic process sulfur amino acid biosynthetic process alpha-amino acid biosynthetic process cysteine biosynthetic process from serine L-serine metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR046342	CBS domain superfamily	Homologous Superfamily
A, B	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily	Homologous Superfamily
A, B	IPR001926	Tryptophan synthase beta chain-like, PALP domain	Domain
A, B	IPR005857	Cystathionine beta-synthase	Family
A, B	IPR001216	Cysteine synthase/cystathionine beta-synthase, pyridoxal-phosphate attachment site	Binding Site

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.