1B9H | pdb_00001b9h

CRYSTAL STRUCTURE OF 3-AMINO-5-HYDROXYBENZOIC ACID (AHBA) SYNTHASE

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
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)
A	d1b9ha_	Alpha and beta proteins (a/b)	PLP-dependent transferase-like	PLP-dependent transferases	GABA-aminotransferase-like	3-amino-5-hydroxybenzoic acid synthase (AHBA synthase)	(Amycolatopsis mediterranei ) [TaxId: 33910 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	PLP-dependent transferases	8032409	3000954	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	DegT_DnrJ_EryC1_1	e1b9hA1	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: DegT_DnrJ_EryC1_1	ECOD (1.6)
A	Aminotran_5_N	e1b9hA2	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)
A	3.40.640.10	Alpha Beta	3-Layer(aba) Sandwich	Aspartate Aminotransferase	domain 2	CATH (4.2.0)
A	3.90.1150.10	Alpha Beta	Alpha-Beta Complex	Aspartate Aminotransferase, domain 1	Aspartate Aminotransferase, domain 1	CATH (4.2.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PROTEIN (3-AMINO-5-HYDROXYBENZOIC ACID SYNTHASE)	transferase activity, transferring nitrogenous groups transaminase activity transferase activity catalytic activity lyase activity vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding anion binding heterocyclic compound binding small molecule binding	carbohydrate metabolic process polysaccharide metabolic process biosynthetic process polysaccharide biosynthetic process carbohydrate biosynthetic process metabolic process cellular process primary metabolic process macromolecule metabolic process macromolecule biosynthetic process antibiotic metabolic process antibiotic biosynthetic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR015424	Pyridoxal phosphate-dependent transferase	Homologous Superfamily
A	IPR000653	DegT/DnrJ/EryC1/StrS aminotransferase	Family
A	IPR015421	Pyridoxal phosphate-dependent transferase, major domain	Homologous Superfamily
A	IPR015422	Pyridoxal phosphate-dependent transferase, small domain	Homologous Superfamily

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

Chains	Enzyme Name	Description	Catalytic Residues
A	3-amino-5-hydroxybenzoate synthase M-CSA #419	Catalyzes the dehydration and aromatization of 5-amino- 5-deoxy-3-dehydroshikimate (aminoDHS) to 3-amino-5-hydroxybenzoate (AHBA), a compound that then serves as the starter unit for the assembly of a polyketide during the biosynthesis of rifamycin B and other ansamycin antibiotics. Cannot utilize 5-deoxy-5-amino-3- dehydroquinate (aminoDHQ), 5-deoxy-5-aminoshikimate (aminoSA), quinate, 3-dehydroquinate, or 3-dehydroshikimate (DHS) as substrate. In a complex with RifL, RifK may have a second function in the AHBA pathway, acting as a transaminase introducing the nitrogen into the first pathway intermediate, UDP-3-keto-D-glucose, to give UDP-kanosamine. Appears to use glutamine as the nitrogen donor; NH₄⁺ or asparagine are 30% less effective as nitrogen donors and neither glutamate nor aspartate show activity.	Defined by 8 residues: PHE:A-88ASP:A-159HIS:A-162GLN:A-185LYS:A-188ARG:A_2-219TYR:A_2-226ARG:A_2-236 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 4.2.1.144 (UniProt) Search M-CSA Motif + EC 4.2.1.144 EC: 2.6.1 (UniProt) Search M-CSA Motif + EC 2.6.1

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.