2Y5T | pdb_00002y5t

Crystal structure of the pathogenic autoantibody CIIC1 in complex with the triple-helical C1 peptide

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Modification Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B		e2y5tB1	A: OB-fold	X: RIFT-related	H: Phage tail proteins	T: V-set	F:	ECOD (20:10:01)
A		e2y5tA1	A: OB-fold	X: RIFT-related	H: Phage tail proteins	T: V-set	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	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
B	Fab anti-collagen 2 (CII) C1 epitope	L-KAPPA	Mus musculus (house mouse)	IGKV3-501, IGKJ102, IGKJ201, IGKC01, IGKC*02	V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA	IG	FAB-GAMMA-2A_KAPPA	IMGT (202609-0)
A	Fab anti-collagen 2 (CII) C1 epitope	VH-CH1	Mus musculus (house mouse)	IGHV1-6101, IGHJ301, IGHG2A01, IGHG2A02	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-2A_KAPPA	IMGT (202609-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B	Light Chain	IGKV3	Kappa	c1 \| c1 \| c1	SAbDab (2026-03-13)
A	Heavy Chain	IGHV1	-	c1 \| c1 \| c1	SAbDab (2026-03-13)

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
D [auth F]	HYP	Parent Component: PRO RESID: AA0030 PSI-MOD : 4-hydroxy-L-proline MOD:00039
C [auth E], E [auth G]	HYP	Parent Component: PRO RESID: AA0030 , AA0030 PSI-MOD : 4-hydroxy-L-proline MOD:00039 , 4-hydroxy-L-proline MOD:00039

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.