1FC4

2-AMINO-3-KETOBUTYRATE COA LIGASE

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)
B	d1fc4b1	Alpha and beta proteins (a/b)	PLP-dependent transferase-like	PLP-dependent transferases	GABA-aminotransferase-like	2-amino-3-ketobutyrate CoA ligase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d1fc4b2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d1fc4a1	Alpha and beta proteins (a/b)	PLP-dependent transferase-like	PLP-dependent transferases	GABA-aminotransferase-like	2-amino-3-ketobutyrate CoA ligase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d1fc4a2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	PLP-dependent transferases	8033017	3000954	SCOP2B (2022-06-29)
A	SCOP2 Family	GABA-aminotransferase-like	8020637	4000675	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	PLP-dependent transferases	8033017	3000954	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Aminotran_1_2_C_9	e1fc4B3	A: a+b two layers	X: C-terminal domain in some PLP-dependent transferases (From Topology)	H: C-terminal domain in some PLP-dependent transferases (From Topology)	T: C-terminal domain in some PLP-dependent transferases	F: Aminotran_1_2_C_9	ECOD (1.6)
B	Aminotran_5_N	e1fc4B2	A: a/b three-layered sandwiches	X: PLP-dependent transferases (From Topology)	H: PLP-dependent transferases (From Topology)	T: PLP-dependent transferases	F: Aminotran_5_N	ECOD (1.6)
A	Aminotran_1_2_C_9	e1fc4A1	A: a+b two layers	X: C-terminal domain in some PLP-dependent transferases (From Topology)	H: C-terminal domain in some PLP-dependent transferases (From Topology)	T: C-terminal domain in some PLP-dependent transferases	F: Aminotran_1_2_C_9	ECOD (1.6)
A	Aminotran_5_N	e1fc4A2	A: a/b three-layered sandwiches	X: PLP-dependent transferases (From Topology)	H: PLP-dependent transferases (From Topology)	T: PLP-dependent transferases	F: Aminotran_5_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.40.640.10	Alpha Beta	3-Layer(aba) Sandwich	Aspartate Aminotransferase	domain 2	CATH (4.3.0)
B	3.90.1150.10	Alpha Beta	Alpha-Beta Complex	Aspartate Aminotransferase, domain 1	Aspartate Aminotransferase, domain 1	CATH (4.3.0)
A	3.40.640.10	Alpha Beta	3-Layer(aba) Sandwich	Aspartate Aminotransferase	domain 2	CATH (4.3.0)
A	3.90.1150.10	Alpha Beta	Alpha-Beta Complex	Aspartate Aminotransferase, domain 1	Aspartate Aminotransferase, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00155	Aminotransferase class I and II (Aminotran_1_2)	Aminotransferase class I and II	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	2-AMINO-3-KETOBUTYRATE CONENZYME A LIGASE	acetyltransferase activity acyltransferase activity glycine C-acetyltransferase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity catalytic activity C-acyltransferase activity C-acetyltransferase activity vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding organic cyclic compound binding acetyltransferase activity acyltransferase activity glycine C-acetyltransferase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity catalytic activity C-acyltransferase activity C-acetyltransferase activity vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding organic cyclic compound binding anion binding heterocyclic compound binding small molecule binding ligase activity cation binding metal ion binding	catabolic process serine family amino acid metabolic process oxoacid metabolic process aspartate family amino acid metabolic process amino acid metabolic process organic acid catabolic process organic acid metabolic process alpha-amino acid metabolic process glycine metabolic process cellular catabolic process carboxylic acid catabolic process threonine catabolic process threonine metabolic process small molecule metabolic process catabolic process serine family amino acid metabolic process oxoacid metabolic process aspartate family amino acid metabolic process amino acid metabolic process organic acid catabolic process organic acid metabolic process alpha-amino acid metabolic process glycine metabolic process cellular catabolic process carboxylic acid catabolic process threonine catabolic process threonine metabolic process small molecule metabolic process amino acid catabolic process aspartate family amino acid catabolic process L-threonine catabolic process to glycine L-amino acid catabolic process carboxylic acid metabolic process primary metabolic process L-amino acid metabolic process proteinogenic amino acid metabolic process alpha-amino acid catabolic process proteinogenic amino acid catabolic process metabolic process cellular process small molecule catabolic process biosynthetic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR001917	Aminotransferase, class-II, pyridoxal-phosphate binding site	Binding Site
A, B	IPR015421	Pyridoxal phosphate-dependent transferase, major domain	Homologous Superfamily
A, B	IPR015422	Pyridoxal phosphate-dependent transferase, small domain	Homologous Superfamily
A, B	IPR015424	Pyridoxal phosphate-dependent transferase	Homologous Superfamily
A, B	IPR011282	2-amino-3-ketobutyrate coenzyme A ligase	Family
A, B	IPR004839	Aminotransferase, class I/classII, large domain	Domain
A, B	IPR050087	8-amino-7-oxononanoate synthase class-II	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	glycine C-acetyltransferase M-CSA #762	Threonine is degraded into glycine and the acetyl group in a pathway common to prokaryotic and eukaryotic cells. The pathway is two steps long; the first step is the oxidation of the hydroxy group of threonine to create 2-amino-3-ketobutyrate by L-threonine dehydrogenase. The second step is catalysed by 2-amino-3-ketobutyrate CoA ligase (KBL); this is a PLP-dependent acetyltransferase, transferring the newly formed acetyl group of the substrate to Coenzyme A to give glycine and acetyl-CoA. The two enzymes needed for the pathway form a complex; this is because the aminoketobutyrate intermediate (substrate for KBL) spontaneously decarboxylates in aqueous solution.	Defined by 3 residues: SER:A-188 [auth A-185]HIS:A-216 [auth A-213]LYS:A-247 [auth A-244] \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 2.3.1.29 (PDB Primary Data) Search M-CSA Motif + EC 2.3.1.29

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.