6CA9 | pdb_00006ca9

Crystal structure of Fab PCT64_LMCA (SAR), the least mutated common ancestor of the HIV-1 broadly neutralizing antibody lineage PCT64

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Dd6ca9d_ All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Bd6ca9b_ All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Cd6ca9c1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Cd6ca9c2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ad6ca9a1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
Ad6ca9a2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like) automated matches (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
DAnoctamine6ca9D1 A: alpha bundlesX: PriB N-terminal domain-likeH: gp11/gp12 receptor-binding domainT: gp11/gp12 receptor-binding domainF: AnoctaminECOD (develop294)
BAnoctamine6ca9B1 A: alpha bundlesX: PriB N-terminal domain-likeH: gp11/gp12 receptor-binding domainT: gp11/gp12 receptor-binding domainF: AnoctaminECOD (develop294)
CAnoctamine6ca9C1 A: alpha bundlesX: PriB N-terminal domain-likeH: gp11/gp12 receptor-binding domainT: gp11/gp12 receptor-binding domainF: AnoctaminECOD (develop294)
AAnoctamine6ca9A1 A: alpha bundlesX: PriB N-terminal domain-likeH: gp11/gp12 receptor-binding domainT: gp11/gp12 receptor-binding domainF: AnoctaminECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
D2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (utative)
B2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (utative)
C2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A2.60.40.10 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, D
Fab PCT64_LMCA (SAR), broadly neutralizing antibody VH-CH1 Homo sapiens (human) IGHV3-15*01, IGHV3-15*05, IGHJ6*04, IGHG1*01, IGHG1*02, IGHG1*04, IGHG1*05 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_KAPPA IMGT (202610-0)
A, C
Fab PCT64_LMCA (SAR), broadly neutralizing antibody L-KAPPA Homo sapiens (human) IGKV3-20*01, IGKJ3*01, IGKC*01 V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA IG FAB-GAMMA-1_KAPPA IMGT (202610-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
B, D
Heavy ChainIGHV3 --SAbDab (2026-03-20)
A, C
Light ChainIGKV3 Kappa-SAbDab (2026-03-20)

Protein Modification Annotation

Modified Residue(s)
ChainResidue(s)Description
B, D
TYS Parent Component: TYR

RESID:  AA0172

PSI-MOD :  O4'-sulfo-L-tyrosine MOD:00181