6Y21

Crystal structure of delta466-491 cystathionine beta-synthase from Toxoplasma gondii with L-Cystathionine

External Resource: Annotation

Domain Annotation: ECOD Classification
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 [auth D]	IMPDH_2nd_1	e6y21D2	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: IMPDH_2nd_1	ECOD (1.6)
A [auth D]	PALP	e6y21D1	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: PALP	ECOD (1.6)
B [auth A]	IMPDH_2nd_1	e6y21A2	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: IMPDH_2nd_1	ECOD (1.6)
B [auth A]	PALP	e6y21A1	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: PALP	ECOD (1.6)
C [auth B]	IMPDH_2nd_1	e6y21B3	A: a+b duplicates or obligate multimers	X: CBS-domain (From Topology)	H: CBS-domain (From Topology)	T: CBS-domain	F: IMPDH_2nd_1	ECOD (1.6)
C [auth B]	PALP	e6y21B2	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: PALP	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth D], B [auth A], C [auth B]	PF00291	Pyridoxal-phosphate dependent enzyme (PALP)	Pyridoxal-phosphate dependent enzyme	-	Family
A [auth D], B [auth A], C [auth B]	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 D], B [auth A], C [auth B]	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 small molecule metabolic process sulfur compound metabolic 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 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 D], B [auth A], C [auth B]	IPR046342	CBS domain superfamily	Homologous Superfamily
A [auth D], B [auth A], C [auth B]	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily	Homologous Superfamily
A [auth D], B [auth A], C [auth B]	IPR005857	Cystathionine beta-synthase	Family
A [auth D], B [auth A], C [auth B]	IPR001216	Cysteine synthase/cystathionine beta-synthase, pyridoxal-phosphate attachment site	Binding Site
A [auth D], B [auth A], C [auth B]	IPR001926	Tryptophan synthase beta chain-like, PALP domain	Domain
A [auth D], B [auth A], C [auth B]	IPR000644	CBS domain	Domain
A [auth D], B [auth A], C [auth B]	IPR050214	Cysteine Synthase/Cystathionine Beta-Synthase	Family

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.