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 4NBX | pdb_00004nbx

Crystal Structure of Clostridium difficile Toxin A fragment TcdA-A1 Bound to A20.1 VHH

External Resource: Annotation


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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Bd4nbxb_ All beta proteins Immunoglobulin-like beta-sandwich Immunoglobulin V set domains (antibody variable domain-like) automated matches (Lama glama ) [TaxId: 9844 ], SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
BEF-hand_1,S_100e4nbxB1 A: alpha arraysX: dsRBD-likeH: Peptidyl-tRNA hydrolase domain-likeT: Peptidyl-tRNA hydrolase domain-likeF: EF-hand_1,S_100ECOD (v295.2)
AEF-hand_1,S_100e4nbxA1 A: alpha arraysX: dsRBD-likeH: Peptidyl-tRNA hydrolase domain-likeT: Peptidyl-tRNA hydrolase domain-likeF: EF-hand_1,S_100ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B2.60.40.10 Mainly Beta Sandwich Immunoglobulin-like ImmunoglobulinsCATH (4.3.0)
A2.10.270.10 Mainly Beta Ribbon left handed beta-beta-3-solenoid Cholin BindingCATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

ChainProtein NameDescriptionOrganism NameGene Allele Name(s)Domain Name(s)Receptor TypeReceptor DescriptionProvenance Source
A20.1 VHH VH Lama glama (llama) IGHV3S3*01, IGHJ4*01 V-DOMAIN VH IG (VH) IMGT (202640-0)

SAbDab Antibody Annotation SAbDab Database Homepage

ChainChain ClassChain SubclassChain TypeAntigen Name(s) Provenance Source
Heavy ChainIGHV1 -tcdaSAbDab (2026-10-16)