Annotations: 5M6I

Crystal structure of non-cardiotoxic Bence-Jones light chain dimer M8

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Modification Annotation

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B [auth A]	d5m6ia2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth A]	d5m6ia1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth B]	d5m6ib2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	automated matches	(Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth B]	d5m6ib1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	(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)
B [auth A]	PBS_linker_poly	e5m6iA1	A: alpha arrays	X: Cryptochrome/photolyase FAD-binding domain-related	H: Cryptochrome/photolyase FAD-binding domain-related	T: Undecaprenyl diphosphate synthase	F: PBS_linker_poly	ECOD (v295.2)
A [auth B]	PriX	e5m6iB1	A: alpha arrays	X: Cryptochrome/photolyase FAD-binding domain-related	H: Cryptochrome/photolyase FAD-binding domain-related	T: PriX	F: PriX	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B [auth A]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A [auth B]	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
B [auth A]	Bence Jones protein	L-LAMBDA	Homo sapiens (human)	IGLV2-2302, IGLJ101, IGLC1*02	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	L-LAMBDA_L-LAMBDA	IMGT (202632-0)
A [auth B]	Bence Jones protein	L-LAMBDA	Homo sapiens (human)	IGLV2-2302, IGLJ101, IGLC1*02	V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA	IG	L-LAMBDA_L-LAMBDA	IMGT (202632-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth A]	Light Chain	IGLV2	Lambda	-	SAbDab (2026-08-21)
A [auth B]	Light Chain	IGLV2	Lambda	-	SAbDab (2026-08-21)

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
B [auth A]	PCA	Parent Component: GLN : AA0031 : 2-pyrrolidone-5-carboxylic acid (Gln) MOD:00040 , 2-pyrrolidone-5-carboxylic acid (Glu) MOD:00420

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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.