6ION | pdb_00006ion

The complex of C4.4A with its antibody 11H10 Fab fragment

External Resource: Annotation

Domain Annotation: SCOP/SCOPe 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
Pharos: Disease Associations

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth L]	d6ionl2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
A [auth L]	d6ionl1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)
B [auth H]	d6ionh_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Mus musculus ) [TaxId: 10090 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth L]	Histone	e6ionL1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: Histone	ECOD (v294.1)
B [auth H]	Histone	e6ionH1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: Histone	ECOD (v294.1)
C [auth A]	Histone	e6ionA1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: Helical bundle in flu nucleocapsid protein	T: Helical bundle in flu nucleocapsid protein	F: Histone	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)
B [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
C [auth A]	2.10.60.10	Mainly Beta	Ribbon	CD59	CD59	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]	Fab 11H10, anti-C4.4A	L-KAPPA	Mus musculus (house mouse)	IGKV5-4801, IGKJ401, IGKC01, IGKC02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-1_KAPPA	IMGT (202613-0)
B [auth H]	Fab 11H10, anti-C4.4A	VH-CH1	Mus musculus (house mouse)	IGHV8-801, IGHJ201, IGHG1*02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_KAPPA	IMGT (202613-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth L]	Light Chain	IGKV5	Kappa	ly6/plaur domain-containing protein 3	SAbDab (2026-04-10)
B [auth H]	Heavy Chain	IGHV8	-	ly6/plaur domain-containing protein 3	SAbDab (2026-04-10)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth A]	PF00021	u-PAR/Ly-6 domain (UPAR_LY6)	u-PAR/Ly-6 domain	This extracellular disulphide bond rich domain is related to Pfam:PF00087.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth L]	anti-C4.4A antibody 11H10, light chain	-	-	-
B [auth H]	anti-C4.4A antibody 11H10, heavy chain	-	-	-
C [auth A]	Ly6/PLAUR domain-containing protein 3	extracellular matrix binding binding protein binding laminin binding	cell adhesion cell-matrix adhesion cell-substrate adhesion cellular process regulation of biological process regulation of cellular process muscle cell apoptotic process smooth muscle cell apoptotic process negative regulation of programmed cell death regulation of apoptotic process biological regulation negative regulation of biological process regulation of muscle cell apoptotic process regulation of programmed cell death cell adhesion cell-matrix adhesion cell-substrate adhesion cellular process regulation of biological process regulation of cellular process muscle cell apoptotic process smooth muscle cell apoptotic process negative regulation of programmed cell death regulation of apoptotic process biological regulation negative regulation of biological process regulation of muscle cell apoptotic process regulation of programmed cell death cell death regulation of smooth muscle cell apoptotic process negative regulation of smooth muscle cell apoptotic process negative regulation of apoptotic process negative regulation of muscle cell apoptotic process negative regulation of cellular process apoptotic process programmed cell death	cellular anatomical structure membrane side of membrane cell periphery plasma membrane extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth A]	IPR045860	Snake toxin-like superfamily	Homologous Superfamily
C [auth A]	IPR016054	Ly-6 antigen/uPA receptor-like	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
C [auth A]	Pharos: O95274	adrenal cortex carcinoma esophageal adenocarcinoma nasopharyngeal carcinoma spina bifida cystic fibrosis interstitial cystitis non-small cell lung carcinoma tuberculosis ductal breast carcinoma in situ invasive ductal breast carcinoma ovarian cancer

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.