Annotations: 6XWL

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth F]	PF00571	e6xwlF1	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: PF00571	ECOD (1.6)
A [auth F]	PF00291	e6xwlF3	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 [auth A]	PF00571	e6xwlA3	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: PF00571	ECOD (1.6)
B [auth A]	PF00291	e6xwlA2	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)
C [auth B]	PF00571	e6xwlB2	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: PF00571	ECOD (1.6)
C [auth B]	PF00291	e6xwlB1	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)
D [auth C]	PF00571	e6xwlC1	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: PF00571	ECOD (1.6)
D [auth C]	PF00291	e6xwlC3	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)
E [auth D]	PF00571	e6xwlD2	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: PF00571	ECOD (1.6)
E [auth D]	PF00291	e6xwlD3	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)
F [auth E]	PF00571	e6xwlE2	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: PF00571	ECOD (1.6)
F [auth E]	PF00291	e6xwlE1	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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	PF00291	Pyridoxal-phosphate dependent enzyme (PALP)	Pyridoxal-phosphate dependent enzyme	-	Family
A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	PF00571	CBS domain (CBS)	CBS domain	CBS domains are small intracellular modules that pair together to form a stable globular domain [2]. This family represents a single CBS domain. Pairs of these domains have been termed a Bateman domain [6]. CBS domains have been shown to bind ligands ...	CBS domains are small intracellular modules that pair together to form a stable globular domain [2]. This family represents a single CBS domain. Pairs of these domains have been termed a Bateman domain [6]. CBS domains have been shown to bind ligands with an adenosyl group such as AMP, ATP and S-AdoMet [5]. CBS domains are found attached to a wide range of other protein domains suggesting that CBS domains may play a regulatory role making proteins sensitive to adenosyl carrying ligands. The region containing the CBS domains in Cystathionine-beta synthase is involved in regulation by S-AdoMet [4]. CBS domain pairs from AMPK bind AMP or ATP [5]. The CBS domains from IMPDH and the chloride channel CLC2 bind ATP [5].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	Cystathionine beta-synthase	cysteine synthase activity transferase activity transferase activity, transferring alkyl or aryl (other than methyl) groups catalytic activity cystathionine beta-synthase activity hydro-lyase activity lyase activity carbon-oxygen lyase activity carbon-sulfur lyase activity L-cysteine desulfhydrase activity	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 [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	IPR046342	CBS domain superfamily	Homologous Superfamily
A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily	Homologous Superfamily
A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	IPR001926	Tryptophan synthase beta chain-like, PALP domain	Domain
A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	IPR000644	CBS domain	Domain
A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	IPR005857	Cystathionine beta-synthase	Family
A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], A [auth F], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E]	IPR001216	Cysteine synthase/cystathionine beta-synthase, pyridoxal-phosphate attachment site	Binding Site

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.