Annotations: 4NHG

Crystal Structure of 2G12 IgG Dimer

External Resource: Annotation

Domain Annotation: ECOD Classification
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)
R [auth P]	Thioredoxin	e4nhgP1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
Q [auth O]	Thioredoxin	e4nhgO1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
L [auth Y]	Thioredoxin	e4nhgY1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
K [auth X]	Thioredoxin	e4nhgX1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
J [auth N]	Thioredoxin	e4nhgN1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
I [auth J]	C1-set	e4nhgJ1	A: beta barrels	X: Repetitive alpha hairpins	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Nicotinate/Quinolinate PRTase N-terminal domain-like	F: C1-set	ECOD (v294.2)
O [auth L]	Thioredoxin	e4nhgL1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
N [auth K]	Thioredoxin	e4nhgK1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
G	Thioredoxin	e4nhgG1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
F	Thioredoxin	e4nhgF1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
C	Thioredoxin	e4nhgC1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
B	C1-set	e4nhgB1	A: beta barrels	X: Repetitive alpha hairpins	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Nicotinate/Quinolinate PRTase N-terminal domain-like	F: C1-set	ECOD (v294.2)
P [auth M]	Thioredoxin	e4nhgM1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
M [auth H]	Thioredoxin	e4nhgH1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
H [auth I]	Thioredoxin	e4nhgI1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
E	Thioredoxin	e4nhgE1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
D	Thioredoxin	e4nhgD1	A: beta barrels	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.2)
A	C1-set	e4nhgA1	A: beta barrels	X: Repetitive alpha hairpins	H: alpha/beta-Hammerhead/Barrel-sandwich hybrid	T: Nicotinate/Quinolinate PRTase N-terminal domain-like	F: C1-set	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B, C, F, G, N [auth K], B, C, F, G, N [auth K], O [auth L]	Light Chain	IGKV1	Kappa	-	SAbDab (2026-05-08)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], R [auth P]	Hepatitis B virus receptor binding protein	-	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
B, C, F, G, N [auth K], B, C, F, G, N [auth K], O [auth L]	2G12 IgG dimer light chain	-	-	-
A, D, E, H [auth I], M [auth H], A, D, E, H [auth I], M [auth H], P [auth M]	2G12 IgG dimer heavy chain	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], R [auth P]	IPR003597	Immunoglobulin C1-set	Domain
I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], R [auth P]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], R [auth P]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], R [auth P]	IPR007110	Immunoglobulin-like domain	Domain
I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], R [auth P]	IPR050380	Immune Recognition and Response Modulators	Family
I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], I [auth J], J [auth N], K [auth X], L [auth Y], Q [auth O], R [auth P]	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site

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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.

4NHG | pdb_00004nhg

Crystal Structure of 2G12 IgG Dimer

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

SAbDab Antibody Annotation SAbDab Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage