2BX5 | pdb_00002bx5

Is FR1 the antibody's Achillies heel

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
O	d2bx5o_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
N	d2bx5n_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
M	d2bx5m_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
L	d2bx5l_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
K	d2bx5k_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
J	d2bx5j_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
I	d2bx5i_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
H	d2bx5h_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G	d2bx5g_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F	d2bx5f_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d2bx5e_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d2bx5d_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d2bx5c_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d2bx5b_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d2bx5a_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
O	ACR_tran	e2bx5O1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
N	ACR_tran	e2bx5N1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
M	ACR_tran	e2bx5M1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
L	ACR_tran	e2bx5L1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
K	ACR_tran	e2bx5K1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
J	ACR_tran	e2bx5J1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
I	ACR_tran	e2bx5I1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
H	ACR_tran	e2bx5H1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
G	ACR_tran	e2bx5G1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
F	ACR_tran	e2bx5F1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
E	ACR_tran	e2bx5E1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
D	ACR_tran	e2bx5D1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
C	ACR_tran	e2bx5C1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
B	ACR_tran	e2bx5B1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: ACR_tran	ECOD (v295.2)
A	UQ_con	e2bx5A1	A: alpha arrays	X: Globin-like	H: Globin-like	T: Globin-like	F: UQ_con	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
O	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
N	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
M	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
L	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
K	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
J	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
I	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)
G	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
F	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D	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	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
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	VD9 VKI	V-KAPPA	Homo sapiens (human)	IGKV1-3901, IGKV1D-3901, IGKJ1*01	V-DOMAIN V-KAPPA	IG	(V-KAPPA)	IMGT (202632-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	Light Chain	IGKV1	Kappa	-	SAbDab (2026-08-21)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	VD9 VKI LIGHT-CHAIN	-	-	cell periphery cellular anatomical structure plasma membrane membrane extracellular region

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	IPR050150	Immunoglobulin Variable Light Chain	Family
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	IPR013106	Immunoglobulin V-set domain	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	IPR003599	Immunoglobulin domain subtype	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J, K, L, M, N, O	IPR007110	Immunoglobulin-like domain	Domain

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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.