Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyGABA-aminotransferase-like 8020028 4000675 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyPLP-dependent transferases 8032408 3000954 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
AAminotran_1_2_C_10e1bs0A1 A: a+b two layersX: 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 transferasesF: Aminotran_1_2_C_10ECOD (1.6)
AAminotran_5_Ne1bs0A2 A: a/b three-layered sandwichesX: PLP-dependent transferases (From Topology)H: PLP-dependent transferases (From Topology)T: PLP-dependent transferasesF: Aminotran_5_NECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A3.90.1150.10 Alpha Beta Alpha-Beta Complex Aspartate Aminotransferase, domain 1 Aspartate Aminotransferase, domain 1CATH (4.3.0)
A3.40.640.10 Alpha Beta 3-Layer(aba) Sandwich Aspartate Aminotransferase domain 2CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00155Aminotransferase class I and II (Aminotran_1_2)Aminotransferase class I and II- Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
PROTEIN (8-AMINO-7-OXONANOATE SYNTHASE) -

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

ChainsEnzyme NameDescriptionCatalytic Residues
8-amino-7-oxononanoate synthase  M-CSA #430

8-Amino-7-oxononanoate synthase (AONS) is a pyridoxal 5′-phosphate-dependent enzyme that catalyzes the decarboxylative condensation of L-alanine with pimeloyl-CoA in a stereospecific manner to form 8(S)-amino-7-oxononanoate, coenzyme A, and carbon dioxide in the first committed step of biotin biosynthesis. AONS also performs the carboxylation of acetyl-CoA to give malonyl-CoA, which is the first step in fatty acid biosynthesis.

Biotin is an essential enzyme cofactor for carboxylase and transcarboxlase reactions. Fatty acid synthesis is essential for the growth and development of most organisms. Plants, microorganisms, and some fungi bio-synthesize their own biotin, whilst animals require trace amounts in their diet, thus, inhibition of the enzymes involved in the biotin biosynthesis pathway can cause irreparable damage to plants but can be non-toxic to mammals; for this reason, such enzymes can be useful targets for the rational design of inhibitors in the hopes of finding new herbicides and antibiotics.

Defined by 7 residues: ASN:A-47HIS:A-133GLU:A-175SER:A-179ASP:A-204HIS:A-207LYS:A-236
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