9PAT | pdb_00009pat

Antibody (1B2) Bound Rifamycin Synthetase Module 1 in the Transacylation Mode

External Resource: Annotation

SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
F [auth I], G [auth L]	Light Chain	IGKV2	Kappa	6-deoxyerythronolide-b synthase	SAbDab (2025-12-19)
D [auth G], E [auth H]	Heavy Chain	IGHV3	-	6-deoxyerythronolide-b synthase	SAbDab (2025-12-19)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C	PF00550	Phosphopantetheine attachment site (PP-binding)	Phosphopantetheine attachment site	A 4'-phosphopantetheine prosthetic group is attached through a serine. This prosthetic group acts as a a 'swinging arm' for the attachment of activated fatty acid and amino-acid groups. This domain forms a four helix bundle. This family includes memb ...	A 4'-phosphopantetheine prosthetic group is attached through a serine. This prosthetic group acts as a a 'swinging arm' for the attachment of activated fatty acid and amino-acid groups. This domain forms a four helix bundle. This family includes members not included in Prosite. The inclusion of these members is supported by sequence analysis and functional evidence. The related domain of Swiss:P19828 has the attachment serine replaced by an alanine.	Domain
A, B	PF02801	Beta-ketoacyl synthase, C-terminal domain (Ketoacyl-synt_C)	Beta-ketoacyl synthase, C-terminal domain	The structure of beta-ketoacyl synthase is similar to that of the thiolase family (Pfam:PF00108) and also chalcone synthase. The active site of beta-ketoacyl synthase is located between the N and C-terminal domains.	Domain
A, B	PF21089	Polyketide synthase dehydratase domain (PKS_DH_N)	Polyketide synthase dehydratase domain	This domain is part of a dehydratase domain found in diverse PKS enzymes. This domain adopts a HotDog fold.	Domain
A, B	PF00109	Beta-ketoacyl synthase, N-terminal domain (ketoacyl-synt)	Beta-ketoacyl synthase, N-terminal domain	The structure of beta-ketoacyl synthase is similar to that of the thiolase family (Pfam:PF00108) and also chalcone synthase. The active site of beta-ketoacyl synthase is located between the N and C-terminal domains. The N-terminal domain contains m ...	The structure of beta-ketoacyl synthase is similar to that of the thiolase family (Pfam:PF00108) and also chalcone synthase. The active site of beta-ketoacyl synthase is located between the N and C-terminal domains. The N-terminal domain contains most of the structures involved in dimer formation and also the active site cysteine [1].	Domain
A, B	PF16197	Ketoacyl-synthetase C-terminal extension (KAsynt_C_assoc)	Ketoacyl-synthetase C-terminal extension	-	Family
A, B	PF08659	KR domain (KR)	KR domain	-	Family
A, B	PF00698	Acyl transferase domain (Acyl_transf_1)	Acyl transferase domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
F [auth I], G [auth L]	Antibody Fragment 1B2 Light Chain	-	-	-
D [auth G], E [auth H]	Antibody Fragment 1B2 Heavy Chain	-	-	-
C	6-deoxyerythronolide-B synthase	vitamin binding amide binding modified amino acid binding binding phosphopantetheine binding small molecule binding acyltransferase activity 3-oxoacyl-[acyl-carrier-protein] synthase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity catalytic activity erythronolide synthase activity fatty acid synthase activity	fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process carboxylic acid metabolic process lipid biosynthetic process primary metabolic process organic acid biosynthetic process organic acid metabolic process fatty acid biosynthetic process carboxylic acid biosynthetic process biosynthetic process small molecule metabolic process metabolic process fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process carboxylic acid metabolic process lipid biosynthetic process primary metabolic process organic acid biosynthetic process organic acid metabolic process fatty acid biosynthetic process carboxylic acid biosynthetic process biosynthetic process small molecule metabolic process metabolic process cellular process monocarboxylic acid metabolic process lipid metabolic process	-
A, B	6-deoxyerythronolide-B synthase	vitamin binding amide binding modified amino acid binding binding phosphopantetheine binding small molecule binding acyltransferase activity 3-oxoacyl-[acyl-carrier-protein] synthase activity acyltransferase activity, transferring groups other than amino-acyl groups transferase activity catalytic activity erythronolide synthase activity fatty acid synthase activity	fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process carboxylic acid metabolic process lipid biosynthetic process primary metabolic process organic acid biosynthetic process organic acid metabolic process fatty acid biosynthetic process carboxylic acid biosynthetic process biosynthetic process small molecule metabolic process metabolic process fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process carboxylic acid metabolic process lipid biosynthetic process primary metabolic process organic acid biosynthetic process organic acid metabolic process fatty acid biosynthetic process carboxylic acid biosynthetic process biosynthetic process small molecule metabolic process metabolic process cellular process monocarboxylic acid metabolic process lipid metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C	IPR016035	Acyl transferase/acyl hydrolase/lysophospholipase	Homologous Superfamily
C	IPR014031	Beta-ketoacyl synthase, C-terminal	Domain
C	IPR006162	Phosphopantetheine attachment site	PTM
C	IPR057326	Ketoreductase domain	Domain
C	IPR049552	Polyketide synthase, dehydratase domain, N-terminal	Domain
C	IPR020845	AMP-binding, conserved site	Conserved Site
C	IPR016036	Malonyl-CoA ACP transacylase, ACP-binding	Homologous Superfamily
C	IPR050091	Polyketide and Nonribosomal Peptide Biosynthesis Enzymes	Family
C	IPR020841	Polyketide synthase, beta-ketoacyl synthase domain	Domain
C	IPR020807	Polyketide/metazoan fatty acid synthase-like, dehydratase domain	Domain
C	IPR036736	ACP-like superfamily	Homologous Superfamily
C	IPR014043	Acyl transferase domain	Domain
C	IPR025110	AMP-binding enzyme, C-terminal domain	Domain
C	IPR041618	Polyketide synthase dimerisation element domain	Domain
C	IPR032821	Polyketide synthase, C-terminal extension	Domain
C	IPR009081	Phosphopantetheine binding ACP domain	Domain
C	IPR020806	Polyketide synthase-like, phosphopantetheine-binding domain	Domain
C	IPR013968	Polyketide synthase-like, ketoreductase domain	Domain
C	IPR016039	Thiolase-like	Homologous Superfamily
C	IPR001227	Acyl transferase domain superfamily	Homologous Superfamily
C	IPR045851	AMP-binding enzyme, C-terminal domain superfamily	Homologous Superfamily
C	IPR042099	ANL, N-terminal domain	Homologous Superfamily
C	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
C	IPR018201	Beta-ketoacyl synthase, active site	Active Site
C	IPR014030	Beta-ketoacyl synthase-like, N-terminal	Domain
C	IPR000873	AMP-dependent synthetase/ligase domain	Domain
C	IPR042104	Polyketide synthase, dehydratase domain superfamily	Homologous Superfamily
A, B	IPR016035	Acyl transferase/acyl hydrolase/lysophospholipase	Homologous Superfamily
A, B	IPR014031	Beta-ketoacyl synthase, C-terminal	Domain
A, B	IPR006162	Phosphopantetheine attachment site	PTM
A, B	IPR057326	Ketoreductase domain	Domain
A, B	IPR049552	Polyketide synthase, dehydratase domain, N-terminal	Domain
A, B	IPR020845	AMP-binding, conserved site	Conserved Site
A, B	IPR016036	Malonyl-CoA ACP transacylase, ACP-binding	Homologous Superfamily
A, B	IPR050091	Polyketide and Nonribosomal Peptide Biosynthesis Enzymes	Family
A, B	IPR020841	Polyketide synthase, beta-ketoacyl synthase domain	Domain
A, B	IPR020807	Polyketide/metazoan fatty acid synthase-like, dehydratase domain	Domain
A, B	IPR036736	ACP-like superfamily	Homologous Superfamily
A, B	IPR014043	Acyl transferase domain	Domain
A, B	IPR025110	AMP-binding enzyme, C-terminal domain	Domain
A, B	IPR041618	Polyketide synthase dimerisation element domain	Domain
A, B	IPR032821	Polyketide synthase, C-terminal extension	Domain
A, B	IPR009081	Phosphopantetheine binding ACP domain	Domain
A, B	IPR020806	Polyketide synthase-like, phosphopantetheine-binding domain	Domain
A, B	IPR013968	Polyketide synthase-like, ketoreductase domain	Domain
A, B	IPR016039	Thiolase-like	Homologous Superfamily
A, B	IPR001227	Acyl transferase domain superfamily	Homologous Superfamily
A, B	IPR045851	AMP-binding enzyme, C-terminal domain superfamily	Homologous Superfamily
A, B	IPR042099	ANL, N-terminal domain	Homologous Superfamily
A, B	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
A, B	IPR018201	Beta-ketoacyl synthase, active site	Active Site
A, B	IPR014030	Beta-ketoacyl synthase-like, N-terminal	Domain
A, B	IPR000873	AMP-dependent synthetase/ligase domain	Domain
A, B	IPR042104	Polyketide synthase, dehydratase domain superfamily	Homologous Superfamily