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Crystal structure of broadly and potently neutralizing antibody 12a21 in complex with hiv-1 strain 93th057 gp120 mutant External Resource: Annotation Chains Family Name Domain Identifier Architecture Possible Homology Homology Topology Family Provenance Source (Version) C [auth L] SNase e4jpwL1 A: alpha arrays X: Rossmann-like H: Rossmann-related T: NagB/RpiA/CoA transferase-like F: SNase ECOD (v295.2) B [auth H] SNase e4jpwH1 A: alpha arrays X: HTH H: HTH T: Catalytic domain of hepatitis C virus NS2-3 protease F: SNase ECOD (v295.2) A [auth G] AWS e4jpwG1 A: alpha arrays X: Immunoglobulin-like beta-sandwich H: Immunoglobulin-related T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like F: AWS ECOD (v295.2)
Chain Protein Name Description Organism Name Gene Allele Name(s) Domain Name(s) Receptor Type Receptor Description Provenance Source C [auth L] 12A21 mAb, anti-gp120 [HIV-1], broadly neutralizing L-KAPPA Homo sapiens (human) IGKV1-39*01, IGKV1D-39*01, IGKJ3*01, IGKC*01 V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA IG FAB-GAMMA-1_KAPPA IMGT (202640-0) B [auth H] 12A21 mAb, anti-gp120 [HIV-1], broadly neutralizing VH-CH1 Homo sapiens (human) IGHV1-2*02, IGHJ5*02, IGHG1*01, IGHG1*02, IGHG1*04 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_KAPPA IMGT (202640-0)
Chain Chain Class Chain Subclass Chain Type Antigen Name(s) Provenance Source C [auth L] Light Chain IGKV1 Kappa hiv-1 clade a/e strain 73th057 gp120 with mutation h375s SAbDab (2026-10-16) B [auth H] Heavy Chain IGHV1 - hiv-1 clade a/e strain 73th057 gp120 with mutation h375s SAbDab (2026-10-16)