5C0N | pdb_00005c0n

Development of a monoclonal antibody targeting secreted aP2 to treat diabetes and fatty liver disease

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
F [auth D]	d5c0nd_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Oryctolagus cuniculus ) [TaxId: 9986 ],	SCOPe (2.08)
C [auth L]	d5c0nl_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Oryctolagus cuniculus ) [TaxId: 9986 ],	SCOPe (2.08)
E [auth C]	d5c0nc_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Oryctolagus cuniculus ) [TaxId: 9986 ],	SCOPe (2.08)
B [auth H]	d5c0nh_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Oryctolagus cuniculus ) [TaxId: 9986 ],	SCOPe (2.08)
D [auth B]	d5c0nb_	All beta proteins	Lipocalins	Lipocalins	Fatty acid binding protein-like	Adipocyte lipid-binding protein, ALBP	House Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A	d5c0na_	All beta proteins	Lipocalins	Lipocalins	Fatty acid binding protein-like	Adipocyte lipid-binding protein, ALBP	House Mouse (Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D [auth B]	SCOP2B Superfamily	Lipocalins	8042656	3001332	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Lipocalins	8042656	3001332	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)
F [auth D]		e5c0nD1	A: Carbon-nitrogen hydrolase-like	X: Metallo-dependent phosphatases	H: Metallo-dependent phosphatases	T: GCD14	F:	ECOD (20:10:01)
C [auth L]		e5c0nL1	A: Carbon-nitrogen hydrolase-like	X: Metallo-dependent phosphatases	H: Metallo-dependent phosphatases	T: GCD14	F:	ECOD (20:10:01)
E [auth C]		e5c0nC2	A: Carbon-nitrogen hydrolase-like	X: Metallo-dependent phosphatases	H: Metallo-dependent phosphatases	T: GCD14	F:	ECOD (20:10:01)
E [auth C]		e5c0nC1	A: Lipocalins/Streptavidin	X: SAM/DNA-glycosylase	H: SAM domain-like	T: EF-hand_1, EF-hand_6, EF-hand_7	F:	ECOD (20:10:01)
B [auth H]		e5c0nH1	A: Carbon-nitrogen hydrolase-like	X: Metallo-dependent phosphatases	H: Metallo-dependent phosphatases	T: GCD14	F:	ECOD (20:10:01)
B [auth H]		e5c0nH2	A: Lipocalins/Streptavidin	X: SAM/DNA-glycosylase	H: SAM domain-like	T: EF-hand_1, EF-hand_6, EF-hand_7	F:	ECOD (20:10:01)
D [auth B]		e5c0nB1	A: Carbon-nitrogen hydrolase-like	X: Metallo-dependent phosphatases	H: Metallo-dependent phosphatases	T: GCD14	F:	ECOD (20:10:01)
A		e5c0nA1	A: Carbon-nitrogen hydrolase-like	X: Metallo-dependent phosphatases	H: Metallo-dependent phosphatases	T: GCD14	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E [auth C]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth B]	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
A	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
C [auth L], F [auth D]	CA33 Fab	L-KAPPA	Oryctolagus cuniculus (rabbit)	IGKV1S302, IGKJ1-203, IGKJ1-202, IGKJ1-201, IGKC01, IGKC02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202609-0)
B [auth H], E [auth C]	CA33 Fab	VH-CH1	Oryctolagus cuniculus (rabbit)	IGHV1S6901, IGHJ301, IGHJ501, IGHJ502, IGHG1*02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202609-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth L], F [auth D]	Light Chain	IGKV1	Kappa	fatty acid-binding protein, adipocyte	SAbDab (2026-03-13)
B [auth H], E [auth C]	Heavy Chain	IGHV1	-	fatty acid-binding protein, adipocyte	SAbDab (2026-03-13)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, D [auth B]	PF00061	Lipocalin / cytosolic fatty-acid binding protein family (Lipocalin)	Lipocalin / cytosolic fatty-acid binding protein family	Lipocalins are transporters for small hydrophobic molecules, such as lipids, steroid hormones, bilins, and retinoids. The family also encompasses the enzyme prostaglandin D synthase (EC:5.3.99.2). Alignment subsumes both the lipocalin and fatty acid ...	Lipocalins are transporters for small hydrophobic molecules, such as lipids, steroid hormones, bilins, and retinoids. The family also encompasses the enzyme prostaglandin D synthase (EC:5.3.99.2). Alignment subsumes both the lipocalin and fatty acid binding protein signatures from PROSITE. This is supported on structural and functional grounds. The structure is an eight-stranded beta barrel.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth L], F [auth D]	Fab CA33 light chain	-	-	-
B [auth H], E [auth C]	Fab CA33 Heavy chain	-	-	-
A, D [auth B]	Fatty acid-binding protein, adipocyte	protein binding binding signaling receptor binding hormone receptor binding fatty acid binding organic acid binding ion binding anion binding long-chain fatty acid binding lipid binding carboxylic acid binding monocarboxylic acid binding small molecule binding long-chain fatty acid transmembrane transporter activity protein binding binding signaling receptor binding hormone receptor binding fatty acid binding organic acid binding ion binding anion binding long-chain fatty acid binding lipid binding carboxylic acid binding monocarboxylic acid binding small molecule binding long-chain fatty acid transmembrane transporter activity lipid transporter activity lipid transmembrane transporter activity fatty acid transmembrane transporter activity transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity transmembrane transporter activity enzyme regulator activity enzyme activator activity molecular function activator activity molecular function regulator activity lipase activator activity	regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process negative regulation of DNA-templated transcription regulation of biological process negative regulation of metabolic process biological regulation primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process cellular process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process cellular response to stimulus cellular response to metal ion cellular response to chemical stimulus response to lithium ion cellular response to lithium ion response to stimulus response to metal ion response to chemical regulation of defense response regulation of response to external stimulus defense response positive regulation of biological process response to external stimulus regulation of inflammatory response positive regulation of response to stimulus positive regulation of response to external stimulus positive regulation of inflammatory response regulation of response to stimulus regulation of response to stress response to stress positive regulation of defense response inflammatory response organic anion transport carboxylic acid transport transport lipid localization lipid transport establishment of localization organic acid transport localization monocarboxylic acid transport fatty acid transport macromolecule localization long-chain fatty acid transport sterol homeostasis chemical homeostasis homeostatic process cholesterol homeostasis lipid homeostasis cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation positive regulation of cellular process fatty acid metabolic process oxoacid metabolic process carboxylic acid metabolic process small molecule metabolic process monocarboxylic acid metabolic process organic acid metabolic process lipid metabolic process response to peptide cellular response to tumor necrosis factor response to cytokine cellular response to cytokine stimulus response to tumor necrosis factor multicellular organismal process adaptive thermogenesis multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis positive regulation of multicellular organismal process regulation of multicellular organismal process neutral lipid metabolic process lipid catabolic process catabolic process neutral lipid catabolic process glycerolipid catabolic process acylglycerol catabolic process triglyceride catabolic process triglyceride metabolic process glycerolipid metabolic process acylglycerol metabolic process biological process involved in interspecies interaction between organisms response to other organism response to bacterium response to external biotic stimulus response to biotic stimulus developmental process fat cell differentiation cellular developmental process brown fat cell differentiation cell differentiation organelle assembly lipid storage membraneless organelle assembly lipid droplet formation cellular component organization cellular component biogenesis organelle organization cellular component assembly lipid droplet organization nutrient storage cellular component organization or biogenesis white fat cell differentiation	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen lipid droplet membraneless organelle intracellular membraneless organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, D [auth B]	IPR012674	Calycin	Homologous Superfamily
A, D [auth B]	IPR000566	Lipocalin/cytosolic fatty-acid binding domain	Domain
A, D [auth B]	IPR000463	Cytosolic fatty-acid binding	Domain
A, D [auth B]	IPR031259	Intracellular lipid binding protein	Family

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.