4QF1 | pdb_00004qf1

Crystal structure of unliganded CH59UA, the inferred unmutated ancestor of the RV144 anti-HIV antibody lineage producing CH59

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
A [auth H]d4qf1h_ All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
C [auth A]d4qf1a_ All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
B [auth L]d4qf1l2 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 L]d4qf1l1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
D [auth B]d4qf1b2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
D [auth B]d4qf1b1 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

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
A [auth H]Polyoma_coate4qf1H1 A: alpha bundlesX: Four-helical up-and-down bundleH: Thymidylate synthase/dCMP hydroxymethylaseT: Thymidylate synthase/dCMP hydroxymethylaseF: Polyoma_coatECOD (develop294)
C [auth A]Thymidylat_synte4qf1A1 A: alpha bundlesX: Four-helical up-and-down bundleH: Thymidylate synthase/dCMP hydroxymethylaseT: Thymidylate synthase/dCMP hydroxymethylaseF: Thymidylat_syntECOD (develop294)
B [auth L]Polyoma_coate4qf1L1 A: alpha bundlesX: Four-helical up-and-down bundleH: Thymidylate synthase/dCMP hydroxymethylaseT: Thymidylate synthase/dCMP hydroxymethylaseF: Polyoma_coatECOD (develop294)
D [auth B]Thymidylat_synte4qf1B1 A: alpha bundlesX: Four-helical up-and-down bundleH: Thymidylate synthase/dCMP hydroxymethylaseT: Thymidylate synthase/dCMP hydroxymethylaseF: Thymidylat_syntECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A [auth H]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
C [auth A]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
B [auth L]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
D [auth B]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
A [auth H],
C [auth A]		CH59UA Fab, anti-HIV VH-CH1 Homo sapiens (human) IGHV3-9*01, IGHJ4*01, IGHJ4*02, IGHJ4*03, IGHG1*03 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_LAMBDA IMGT (202610-0)
B [auth L],
D [auth B]		CH59UA Fab, anti-HIV L-LAMBDA Homo sapiens (human) IGLV3-10*01, IGLJ2*01, IGLJ3*02, IGLJ3*01, IGLC2*01, IGLC2*02, IGLC3*04 V-DOMAIN V-LAMBDA, C-DOMAIN C-LAMBDA 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],
C [auth A]		Heavy ChainIGHV3 --SAbDab (2026-03-20)
B [auth L],
D [auth B]		Light ChainIGLV3 Lambda-SAbDab (2026-03-20)