4FQ1 | pdb_00004fq1

Crystal Structure of PGT121 Fab


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

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
B [auth L]PK_Tyr_Ser-Thre4fq1L1 A: alpha bundlesX: Globin-likeH: Flavoproteins/Phosphotyrosine protein phosphatases-likeT: (Phosphotyrosine protein) phosphatases IIF: PK_Tyr_Ser-ThrECOD (develop294)
A [auth H]PK_Tyr_Ser-Thre4fq1H1 A: alpha bundlesX: Globin-likeH: Flavoproteins/Phosphotyrosine protein phosphatases-likeT: (Phosphotyrosine protein) phosphatases IIF: PK_Tyr_Ser-ThrECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B [auth L]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A [auth H]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

ChainProtein NameDescriptionOrganism NameGene Allele Name(s)Domain Name(s)Receptor TypeReceptor DescriptionProvenance Source
B [auth L]FAB-GAMMA-1_LAMBDA L-LAMBDA Homo sapiens (human) IGLV3-21*01, IGLJ3*02, IGLC2*01, IGLC2*02, IGLC3*04 V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA IG FAB-GAMMA-1_LAMBDA IMGT (202610-0)
A [auth H]FAB-GAMMA-1_LAMBDA VH-CH1 Homo sapiens (human) IGHV4-59*01, IGHV4-59*08, IGHV4-4*08, IGHJ6*03, IGHG1*03 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
A [auth H]Heavy ChainIGHV4 --SAbDab (2026-03-20)

Thera-SAbDab Antibody Annotation Thera-SAbDab Database Homepage

ChainNameTargetProvenance Source
B [auth L] Elipovimab HIV-1 gp120Therapeutic SAbDab (2026-03-20)
A [auth H] Elipovimab HIV-1 gp120Therapeutic SAbDab (2026-03-20)