2ISQ

Crystal Structure of O-Acetylserine Sulfhydrylase from Arabidopsis Thaliana in Complex with C-Terminal Peptide from Arabidopsis Serine Acetyltransferase

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

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2isqa_	Alpha and beta proteins (a/b)	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Tryptophan synthase beta subunit-like PLP-dependent enzymes	automated matches	thale cress (Arabidopsis thaliana ) [TaxId: 3702 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Tryptophan synthase beta subunit-like PLP-dependent enzymes	8035351	3001427	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	PALP	e2isqA1	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)

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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	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	Cysteine synthase	RNA binding binding organic cyclic compound binding nucleic acid binding mRNA binding cysteine synthase activity transferase activity transferase activity, transferring alkyl or aryl (other than methyl) groups catalytic activity	developmental process multi-multicellular organism process multicellular organismal process cellular developmental process pollination developmental cell growth developmental growth reproductive process growth unidimensional cell growth cell development cell tip growth developmental process involved in reproduction cell growth cell morphogenesis developmental process multi-multicellular organism process multicellular organismal process cellular developmental process pollination developmental cell growth developmental growth reproductive process growth unidimensional cell growth cell development cell tip growth developmental process involved in reproduction cell growth cell morphogenesis developmental growth involved in morphogenesis anatomical structure morphogenesis pollen tube growth cell differentiation anatomical structure development cellular process pollen tube development sexual reproduction double fertilization forming a zygote and endosperm fertilization serine family amino acid metabolic process oxoacid metabolic process cellular biosynthetic process sulfur amino acid metabolic process 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 nitrogen compound metabolic 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 serine family amino acid biosynthetic process sulfur amino acid biosynthetic process alpha-amino acid biosynthetic process response to stimulus response to metal ion response to chemical response to cadmium ion response to inorganic substance cysteine biosynthetic process from serine L-serine metabolic process	membrane-bounded organelle intracellular anatomical structure plastid cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle plastid stroma organelle chloroplast stroma cytoplasm chloroplast peroxisome microbody cytosol membrane-bounded organelle intracellular anatomical structure plastid cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle plastid stroma organelle chloroplast stroma cytoplasm chloroplast peroxisome microbody cytosol cell periphery plasma membrane membrane extracellular region apoplast plant-type vacuole vacuole nucleus
B	Serine acetyltransferase 1	acetyltransferase activity serine O-acyltransferase activity O-acyltransferase activity serine O-acetyltransferase activity acyltransferase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity O-acetyltransferase activity catalytic activity	response to extracellular stimulus cellular response to stimulus response to nutrient levels response to stimulus response to external stimulus cellular response to starvation cell communication cellular response to nutrient levels cellular response to stress response to stress cellular response to sulfate starvation cellular response to extracellular stimulus cellular process response to starvation response to extracellular stimulus cellular response to stimulus response to nutrient levels response to stimulus response to external stimulus cellular response to starvation cell communication cellular response to nutrient levels cellular response to stress response to stress cellular response to sulfate starvation cellular response to extracellular stimulus cellular process response to starvation cellular response to external stimulus serine family amino acid metabolic process oxoacid metabolic process cellular biosynthetic process sulfur amino acid metabolic process 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 nitrogen compound metabolic process small molecule metabolic process sulfur compound metabolic process organonitrogen compound metabolic process cysteine biosynthetic process from serine small molecule biosynthetic process cellular metabolic process carboxylic acid metabolic process primary metabolic process L-amino acid biosynthetic process L-serine metabolic 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 serine family amino acid biosynthetic process sulfur amino acid biosynthetic process alpha-amino acid biosynthetic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol membrane-bounded organelle intracellular organelle plastid organelle intracellular membrane-bounded organelle chloroplast nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR005856	Cysteine synthase	Family
A	IPR005859	Cysteine synthase CysK	Family
A	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily	Homologous Superfamily
A	IPR001216	Cysteine synthase/cystathionine beta-synthase, pyridoxal-phosphate attachment site	Binding Site
A	IPR001926	Tryptophan synthase beta chain-like, PALP domain	Domain
B	IPR045304	Serine acetyltransferase, LbH domain	Domain
B	IPR005881	Serine O-acetyltransferase	Family
B	IPR001451	Hexapeptide repeat	Repeat
B	IPR042122	Serine acetyltransferase, N-terminal domain superfamily	Homologous Superfamily
B	IPR011004	Trimeric LpxA-like superfamily	Homologous Superfamily
B	IPR010493	Serine acetyltransferase, N-terminal	Domain
B	IPR018357	Hexapeptide transferase, conserved site	Conserved 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.