4HKB | pdb_00004hkb

CH67 Fab (unbound) from the CH65-67 Lineage

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
L [auth K]	PK_Tyr_Ser-Thr	e4hkbK1	A: alpha arrays	X: GIY-YIG endonuclease	H: GIY-YIG endonuclease	T: GIY-YIG endonuclease	F: PK_Tyr_Ser-Thr	ECOD (v295.2)
L [auth K]	Ig_2	e4hkbK3	A: alpha arrays	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: Ig_2	ECOD (v295.2)
K [auth H]	tRNA-synt_His	e4hkbH1	A: alpha arrays	X: HTH	H: HTH	T: winged helix domain	F: tRNA-synt_His	ECOD (v295.2)
J [auth F]	V-set	e4hkbF5	A: alpha arrays	X: Fusion glycoprotein F2	H: Fusion glycoprotein F2	T: Fusion glycoprotein F2	F: V-set	ECOD (v295.2)
I [auth D]	fn3	e4hkbD3	A: alpha arrays	X: Fusion glycoprotein F2	H: Fusion glycoprotein F2	T: Fusion glycoprotein F2	F: fn3	ECOD (v295.2)
H [auth B]	tRNA-synt_His	e4hkbB1	A: alpha arrays	X: HTH	H: HTH	T: winged helix domain	F: tRNA-synt_His	ECOD (v295.2)
G [auth N]	V-set	e4hkbN5	A: alpha arrays	X: Fusion glycoprotein F2	H: Fusion glycoprotein F2	T: Fusion glycoprotein F2	F: V-set	ECOD (v295.2)
F [auth I]	V-set	e4hkbI3	A: alpha arrays	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v295.2)
E [auth G]	V-set	e4hkbG3	A: alpha arrays	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v295.2)
D [auth E]	V-set	e4hkbE3	A: alpha arrays	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v295.2)
C	V-set	e4hkbC3	A: alpha arrays	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v295.2)
B [auth A]	V-set	e4hkbA3	A: alpha arrays	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v295.2)
A [auth J]	V-set	e4hkbJ3	A: alpha arrays	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
L [auth K]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
K [auth H]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
J [auth F]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
I [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
H [auth B]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
G [auth N]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
F [auth I]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E [auth G]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D [auth E]	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)
B [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth J]	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
G [auth N], H [auth B], I [auth D], J [auth F], K [auth H], G [auth N], H [auth B], I [auth D], J [auth F], K [auth H], L [auth K]	CH67 Fab	L-LAMBDA	Homo sapiens (human)	IGLV3-2102, IGLJ201, IGLJ301, IGLC201, IGLC202, IGLC304	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	FAB-GAMMA-1_LAMBDA	IMGT (202636-0)
A [auth J], B [auth A], C, D [auth E], E [auth G], A [auth J], B [auth A], C, D [auth E], E [auth G], F [auth I]	CH67 Fab	VH-CH1	Homo sapiens (human)	IGHV1-204, IGHJ101, IGHG1*03	V-DOMAIN VH, C-DOMAIN CH1	IG	FAB-GAMMA-1_LAMBDA	IMGT (202636-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
G [auth N], H [auth B], I [auth D], J [auth F], K [auth H], G [auth N], H [auth B], I [auth D], J [auth F], K [auth H], L [auth K]	Light Chain	IGLV3	Lambda	-	SAbDab (2026-09-18)
A [auth J], B [auth A], C, D [auth E], E [auth G], A [auth J], B [auth A], C, D [auth E], E [auth G], F [auth I]	Heavy Chain	IGHV1	-	-	SAbDab (2026-09-18)