6LDW | pdb_00006ldw

Structure of antibody C9 in complex with methylated peptide

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Protein Modification Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth L]	Epimerase	e6ldwL1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Epimerase	ECOD (v294.1)
C [auth A]	Epimerase	e6ldwA1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Epimerase	ECOD (v294.1)
B [auth H]	Epimerase	e6ldwH1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Epimerase	ECOD (v294.1)
D [auth B]	Epimerase	e6ldwB1	A: a/b three-layered sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Epimerase	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth L]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
D [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)

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
A [auth L], C [auth A]	Fab C9	L-KAPPA	Oryctolagus cuniculus (rabbit)	IGKV1S201, IGKJ1-202, IGKJ1-201, IGKC101	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202612-0)
B [auth H], D [auth B]	Fab C9	VH-CH1	Oryctolagus cuniculus (rabbit)	IGHV1S6901, IGHJ201, IGHJ601, IGHJ602, IGHJ202, IGHG01, IGHG05, IGHG02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202612-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth L], C [auth A]	Light Chain	IGKV1	Kappa	ile-phe-glu-lys-phe-gly-m3l-gly-gly	SAbDab (2026-03-27)
B [auth H], D [auth B]	Heavy Chain	IGHV1	-	ile-phe-glu-lys-phe-gly-m3l-gly-gly	SAbDab (2026-03-27)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth L], C [auth A]	Fab light chain	-	-	-
B [auth H], D [auth B]	Fab heavy chain	-	-	-
E [auth D], F [auth C]	ILE-PHE-GLU-LYS-PHE-GLY-M3L-GLY-GLY	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding protein binding kinase binding enzyme binding protein kinase binding catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups protein serine/threonine kinase activity MAP kinase kinase kinase activity cation binding metal ion binding protein serine kinase activity	cellular response to stimulus response to stimulus response to mechanical stimulus response to external stimulus response to abiotic stimulus cellular process cellular response to mechanical stimulus cellular response to abiotic stimulus cellular response to external stimulus cellular response to environmental stimulus regulation of biological process regulation of cellular process signaling biological regulation cellular response to stimulus response to stimulus response to mechanical stimulus response to external stimulus response to abiotic stimulus cellular process cellular response to mechanical stimulus cellular response to abiotic stimulus cellular response to external stimulus cellular response to environmental stimulus regulation of biological process regulation of cellular process signaling biological regulation signal transduction intracellular signal transduction cell communication	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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E [auth D], F [auth C]	IPR017441	Protein kinase, ATP binding site	Binding Site
E [auth D], F [auth C]	IPR034879	Mitogen-activated protein kinase kinase kinase 2/3, PB1 domain	Domain
E [auth D], F [auth C]	IPR000270	PB1 domain	Domain
E [auth D], F [auth C]	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
E [auth D], F [auth C]	IPR053793	PB1-like domain	Domain
E [auth D], F [auth C]	IPR000719	Protein kinase domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
E [auth D], F [auth C]	Pharos: Q9Y2U5	ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia rheumatoid arthritis acute myeloid leukemia Blastic phase chronic myeloid leukemia glioblastoma interstitial lung disease lung large cell carcinoma malignant pancreatic neoplasm non-small cell lung carcinoma pancreatic ductal adenocarcinoma Pick disease tuberculosis astrocytic tumor idiopathic pulmonary fibrosis ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia rheumatoid arthritis acute myeloid leukemia Blastic phase chronic myeloid leukemia glioblastoma interstitial lung disease lung large cell carcinoma malignant pancreatic neoplasm non-small cell lung carcinoma pancreatic ductal adenocarcinoma Pick disease tuberculosis astrocytic tumor idiopathic pulmonary fibrosis juvenile dermatomyositis malignant ependymoma medulloblastoma osteosarcoma pancreatic intraductal papillary-mucinous neoplasm primitive neuroectodermal tumor atypical teratoid rhabdoid tumor diabetes mellitus large cell medulloblastoma malignant glioma myopathy

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
E [auth D], F [auth C]	M3L	Parent Component: LYS RESID: AA0074 PSI-MOD : N6,N6,N6-trimethyl-L-lysine MOD:00083

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.