Annotations: 11SZ

Antibody (1B2) Bound Rifamycin Synthetase Module 2

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F [auth L]	Acetyltransf_1	e11szL1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Acetyltransf_1	ECOD (v295.2)
D	Acetyltransf_1	e11szD1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Acetyltransf_1	ECOD (v295.2)
E [auth H]	ClpB_D2-small	e11szH1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: ClpB_D2-small	ECOD (v295.2)
C	Acetyltransf_1	e11szC1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Acetyltransf_1	ECOD (v295.2)
B	ClpB_D2-small	e11szB1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: ClpB_D2-small	ECOD (v295.2)
A	Acetyltransf_1	e11szA1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Acetyltransf_1	ECOD (v295.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D, F [auth L]	Light Chain	IGKV2	Kappa	6-deoxyerythronolide-b synthase, erythronolide synthaseerya2	SAbDab (2026-09-11)
C, E [auth H]	Heavy Chain	IGHV3	-	6-deoxyerythronolide-b synthase, erythronolide synthaseerya2	SAbDab (2026-09-11)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D, F [auth L]	1B2 Antibody Fragment (Fab) Light Chain	-	-	-
C, E [auth H]	1B2 Antibody Fragment (Fab) Heavy Chain	-	-	-
A, B	6-deoxyerythronolide-B synthase, Erythronolide synthase EryA2	vitamin binding modified amino acid binding binding ion binding anion binding phosphopantetheine binding sulfur compound 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 vitamin binding modified amino acid binding binding ion binding anion binding phosphopantetheine binding sulfur compound 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 fatty acid biosynthetic process carboxylic acid biosynthetic process biosynthetic process small molecule metabolic process metabolic process cellular process monocarboxylic acid 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 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
A, B	IPR016035	Acyl transferase/acyl hydrolase/lysophospholipase	Homologous Superfamily
A, B	IPR006162	Phosphopantetheine attachment site	PTM
A, B	IPR057326	Ketoreductase domain	Domain
A, B	IPR045851	AMP-binding enzyme domain superfamily	Homologous Superfamily
A, B	IPR014030	Beta-ketoacyl synthase-like, N-terminal 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	IPR014031	Beta-ketoacyl synthase, 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	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	IPR000873	AMP-dependent synthetase/ligase domain	Domain
A, B	IPR042104	Polyketide synthase, dehydratase domain superfamily	Homologous Superfamily
A, B	IPR055123	Polyketide synthase extender module SpnB-like, Rossmann fold domain	Domain

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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.

11SZ | pdb_000011sz

Antibody (1B2) Bound Rifamycin Synthetase Module 2

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

SAbDab Antibody Annotation SAbDab Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage