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

ChainsDomain InfoClassFoldSuperfamilyFamilyDomainSpeciesProvenance Source (Version)
Ad1cqqa_ All beta proteins Trypsin-like serine proteases Trypsin-like serine proteases Viral cysteine protease of trypsin fold 3C cysteine protease (picornain 3C) (rhinovirus A2 ) [TaxId: 12130 ], SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
ASCOP2 FamilyViral cysteine protease of trypsin fold, (3C/2A)Pro-like 8029915 4007776 SCOP2 (2022-06-29)
ASCOP2 SuperfamilyTrypsin-like serine proteases 8042294 3000114 SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
APeptidase_C3e1cqqA1 A: beta barrelsX: cradle loop barrelH: RIFT-relatedT: FMN-binding split barrel 2F: Peptidase_C3ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
A2.40.10.10 Mainly Beta Beta Barrel Thrombin, subunit H Trypsin-like serine proteasesCATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF005483C cysteine protease (picornain 3C) (Peptidase_C3)3C cysteine protease (picornain 3C)- Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
TYPE 2 RHINOVIRUS 3C PROTEASE

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

ChainsEnzyme NameDescriptionCatalytic Residues
picornain 3C  M-CSA #477

The human rhinovirus 3C is a cysteine protease that is essential for the processing of the viral precursor polyprotein and release of RNA replication proteins. In UniProtKB P04936, the protease 3C portion of the chain is responsible for the cleavage of the sites:

  • 330 - 331
  • 992 - 993
  • 1409 - 1410
  • 1486 - 1487
  • 1507 - 1508
  • 1690 - 1691
The 3C portion of the enzyme is related by amino acid sequence to the trypsin-like serine proteases, and is a member of a novel group of cysteine proteases with a serine protease-like fold.

Defined by 4 residues: HIS:A-40GLU:A-71GLY:A-145CYS:A-147
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Explore in 3DM-CSA Motif Definition