Annotations: 4QHM

I3.1 (unbound) from CH103 Lineage

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F [auth B]	zf-CCHC	e4qhmB1	A: alpha arrays	X: Cysteine proteinases-like	H: SH3	T: SH3	F: zf-CCHC	ECOD (v295)
G [auth D]	zf-CCHC	e4qhmD1	A: alpha arrays	X: Cysteine proteinases-like	H: SH3	T: SH3	F: zf-CCHC	ECOD (v295)
H	zf-CCHC	e4qhmH1	A: alpha arrays	X: Cysteine proteinases-like	H: SH3	T: SH3	F: zf-CCHC	ECOD (v295)
E [auth F]	zf-CCHC	e4qhmF1	A: alpha arrays	X: Cysteine proteinases-like	H: SH3	T: SH3	F: zf-CCHC	ECOD (v295)
A	zf-CCHC	e4qhmA1	A: alpha arrays	X: Cysteine proteinases-like	H: SH3	T: SH3	F: zf-CCHC	ECOD (v295)
B [auth E]	zf-CCHC	e4qhmE1	A: alpha arrays	X: Cysteine proteinases-like	H: SH3	T: SH3	F: zf-CCHC	ECOD (v295)
D [auth G]	zf-CCHC	e4qhmG1	A: alpha arrays	X: Cysteine proteinases-like	H: SH3	T: SH3	F: zf-CCHC	ECOD (v295)
C	zf-CCHC	e4qhmC1	A: alpha arrays	X: Cysteine proteinases-like	H: SH3	T: SH3	F: zf-CCHC	ECOD (v295)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
F [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
G [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
H	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E [auth F]	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)
B [auth E]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth G]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C	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
E [auth F], F [auth B], G [auth D], H	I3	L-LAMBDA	Homo sapiens (human)	IGLV3-101, IGLJ601, IGLC201, IGLC202, IGLC3*04	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202625-0)
A, B [auth E], C, D [auth G]	I3	VH-CH1	Homo sapiens (human)	IGHV4-6108, IGHJ401, IGHJ501, IGHJ502, IGHJ402, IGHJ403, IGHG1*03	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202625-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
E [auth F], F [auth B], G [auth D], H	Light Chain	IGLV3	Lambda	-	SAbDab (2026-06-26)
A, B [auth E], C, D [auth G]	Heavy Chain	IGHV4	-	-	SAbDab (2026-06-26)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E [auth F], F [auth B], G [auth D], H	I2 light chain	-	-	-
A, B [auth E], C, D [auth G]	I3 heavy chain	-	response to stimulus immune response immune system process adaptive immune response	cell periphery cellular anatomical structure plasma membrane membrane protein-containing complex immunoglobulin complex extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth E], C, D [auth G]	IPR003597	Immunoglobulin C1-set	Domain
A, B [auth E], C, D [auth G]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B [auth E], C, D [auth G]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, B [auth E], C, D [auth G]	IPR013106	Immunoglobulin V-set domain	Domain
A, B [auth E], C, D [auth G]	IPR003599	Immunoglobulin domain subtype	Domain
A, B [auth E], C, D [auth G]	IPR007110	Immunoglobulin-like domain	Domain
A, B [auth E], C, D [auth G]	IPR050380	Immune Recognition and Response Modulators	Family
A, B [auth E], C, D [auth G]	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site

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