Annotations: 4NHH

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
R [auth N]	Thioredoxin	e4nhhN1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
Q [auth J]	Thioredoxin	e4nhhJ1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
L [auth D]	Thioredoxin	e4nhhD1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
K [auth C]	Thioredoxin	e4nhhC1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
F [auth B]	Thioredoxin	e4nhhB1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
E [auth A]	Thioredoxin	e4nhhA1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
P [auth R]	Thioredoxin	e4nhhR1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
N [auth O]	Thioredoxin	e4nhhO1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
J [auth I]	Thioredoxin	e4nhhI1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
H [auth E]	Thioredoxin	e4nhhE1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
D [auth M]	Thioredoxin	e4nhhM1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
B [auth H]	Thioredoxin	e4nhhH1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
O [auth P]	Thioredoxin	e4nhhP1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
M [auth Q]	Thioredoxin	e4nhhQ1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
I [auth F]	Thioredoxin	e4nhhF1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
G	Thioredoxin	e4nhhG1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
C [auth K]	Thioredoxin	e4nhhK1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)
A [auth L]	Thioredoxin	e4nhhL1	A: a/b three-layered sandwiches	X: DEATH domain	H: HTH	T: winged helix domain	F: Thioredoxin	ECOD (v294.1)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A [auth L], C [auth K], G, I [auth F], M [auth Q], A [auth L], C [auth K], G, I [auth F], M [auth Q], O [auth P]	Light Chain	IGKV1	Kappa	2g12 igg dimer heavy chain	SAbDab (2026-04-10)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

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

InterPro: Protein Family Classification InterPro Database Homepage

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

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.