5IBU | pdb_00005ibu

6652 Fab (unbound)

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
C [auth H]d5ibuh_ All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
B [auth G]d5ibug_ All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin automated matches automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
D [auth L]d5ibul1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
D [auth L]d5ibul2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like) automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
A [auth B]d5ibub1 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)
A [auth B]d5ibub2 All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin C1 set domains (antibody constant domain-like) automated matches Human (Homo sapiens ) [TaxId: 9606 ], SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
C [auth H]PK_Tyr_Ser-Thre5ibuH1 A: a/b three-layered sandwichesX: Type II ABC importer transmembrane domain foldH: DNA mismatch repair protein MutL regulatory subdomainT: DNA mismatch repair protein MutL regulatory subdomainF: PK_Tyr_Ser-ThrECOD (v294.1)
B [auth G]PK_Tyr_Ser-Thre5ibuG1 A: a/b three-layered sandwichesX: Type II ABC importer transmembrane domain foldH: DNA mismatch repair protein MutL regulatory subdomainT: DNA mismatch repair protein MutL regulatory subdomainF: PK_Tyr_Ser-ThrECOD (v294.1)
D [auth L]PK_Tyr_Ser-Thre5ibuL1 A: a/b three-layered sandwichesX: Type II ABC importer transmembrane domain foldH: DNA mismatch repair protein MutL regulatory subdomainT: DNA mismatch repair protein MutL regulatory subdomainF: PK_Tyr_Ser-ThrECOD (v294.1)
A [auth B]PK_Tyr_Ser-Thre5ibuB1 A: a/b three-layered sandwichesX: Type II ABC importer transmembrane domain foldH: DNA mismatch repair protein MutL regulatory subdomainT: DNA mismatch repair protein MutL regulatory subdomainF: PK_Tyr_Ser-ThrECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
C [auth H]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
B [auth G]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
D [auth L]2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A [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
B [auth G],
C [auth H]		Fab 6652 VH-CH1 Homo sapiens (human) IGHV5-51*01, IGHV5-51*03, IGHV5-10-1*03, IGHV5-10-1*01, IGHJ1*01, IGHG1*03, IGHG1*08, IGHG1*06 V-DOMAIN VH, C-DOMAIN CH1 IG FAB-GAMMA-1_KAPPA IMGT (202612-0)
A [auth B],
D [auth L]		Fab 6652 L-KAPPA Homo sapiens (human) IGKV3-20*01, IGKJ1*01, IGKC*01 V-DOMAIN V-KAPPA, C-DOMAIN C-KAPPA IG FAB-GAMMA-1_KAPPA IMGT (202612-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
B [auth G],
C [auth H]		Heavy ChainIGHV5 --SAbDab (2026-03-27)
A [auth B],
D [auth L]		Light ChainIGKV3 Kappa-SAbDab (2026-03-27)