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Crystal structure of broadly and potently neutralizing antibody VRC-PG20 in complex with HIV-1 clade A/E 93TH057 gp120 External Resource: Annotation Chains Family Name Domain Identifier Architecture Possible Homology Homology Topology Family Provenance Source (Version) C [auth L] Ig_2 e4lsuL3 A: alpha arrays X: Subtilisin-like H: Subtilisin-like T: Subtilisin-like F: Ig_2 ECOD (v295.2) B [auth H] e4lsuH1 A: alpha arrays X: beta-propeller-like H: beta-propeller T: 6-bladed F: ECOD (v295.2) A [auth G] AWS e4lsuG1 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] VRC-PG20 mAb, anti-gp120 [HIV-1], neutralizing L-LAMBDA Homo sapiens (human) IGLV2-14*02, IGLV2-23*01, IGLV2-23*03, IGLJ2*01, IGLJ3*02, IGLJ3*01, IGLC3*03 V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA IG FAB-GAMMA-1_LAMBDA IMGT (202640-0) B [auth H] VRC-PG20 mAb, anti-gp120 [HIV-1], neutralizing VH-CH1 Homo sapiens (human) IGHV1-2*02, IGHJ1*01, IGHG1*01, IGHG1*02, IGHG1*04 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202640-0)
Chain Chain Class Chain Subclass Chain Type Antigen Name(s) Provenance Source C [auth L] Light Chain IGLV2 Lambda hiv-1 clade a/e strain 93th057 gp120 SAbDab (2026-10-16) B [auth H] Heavy Chain IGHV1 - hiv-1 clade a/e strain 93th057 gp120 SAbDab (2026-10-16)
Protein Modification Annotation Modified Residue(s) Chain Residue(s) Description B [auth H] PCA Parent Component: GLN RESID AA0031 PSI-MOD MOD:00040 , 2-pyrrolidone-5-carboxylic acid (Glu) MOD:00420