7NJ0 | pdb_00007nj0

CryoEM structure of the human Separase-Cdk1-cyclin B1-Cks1 complex


Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

ChainsTypeFamily Name Domain Identifier Family IdentifierProvenance Source (Version)
BSCOP2B SuperfamilyProtein kinase-like (PK-like) 8062438 3000066 SCOP2B (2022-06-29)
DSCOP2B SuperfamilyCell cycle regulatory proteins 8037340 3000311 SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

ChainsFamily NameDomain Identifier ArchitecturePossible HomologyHomologyTopologyFamilyProvenance Source (Version)
BPkinase_Tyre7nj0B1 A: a+b complex topologyX: Protein kinase/SAICAR synthase/ATP-grasp (From Homology)H: Protein kinase/SAICAR synthase/ATP-graspT: Protein kinaseF: Pkinase_TyrECOD (1.6)
CCyclin_Ce7nj0C2 A: alpha arraysX: HTHH: HTHT: Cyclin-likeF: Cyclin_CECOD (1.6)
CCyclin_Ne7nj0C1 A: alpha arraysX: HTHH: HTHT: Cyclin-likeF: Cyclin_NECOD (1.6)
DCKSe7nj0D1 A: a+b complex topologyX: Cell cycle regulatory proteins (From Topology)H: Cell cycle regulatory proteins (From Topology)T: Cell cycle regulatory proteinsF: CKSECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

ChainDomainClassArchitectureTopologyHomologyProvenance Source (Version)
B3.30.200.20 Alpha Beta 2-Layer Sandwich Phosphorylase Kinase domain 1CATH (utative)
B1.10.510.10 Mainly Alpha Orthogonal Bundle Transferase(Phosphotransferase) domain 1CATH (utative)

Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF00069Protein kinase domain (Pkinase)Protein kinase domainDomain
PF00134Cyclin, N-terminal domain (Cyclin_N)Cyclin, N-terminal domainCyclins regulate cyclin dependent kinases (CDKs). Swiss:P22674 is a Uracil-DNA glycosylase that is related to other cyclins [4]. Cyclins contain two domains of similar all-alpha fold, of which this family corresponds with the N-terminal domain. Domain
PF02984Cyclin, C-terminal domain (Cyclin_C)Cyclin, C-terminal domainCyclins regulate cyclin dependent kinases (CDKs). Swiss:P22674 is a Uracil-DNA glycosylase that is related to other cyclins [4]. Cyclins contain two domains of similar all-alpha fold, of which this family corresponds with the C-terminal domain. Domain
PF01111Cyclin-dependent kinase regulatory subunit (CKS)Cyclin-dependent kinase regulatory subunitDomain
PF03568Separin, protease domain (Separin_C)Separin, protease domainThis entry represents the C-terminal caspase-like protease domain found in Separin. Separin is a cysteine protease critical for chromosome segregation during mitosis and meiosis, exhibits a conserved multi-domain architecture across eukaryotes. Separ ...This entry represents the C-terminal caspase-like protease domain found in Separin. Separin is a cysteine protease critical for chromosome segregation during mitosis and meiosis, exhibits a conserved multi-domain architecture across eukaryotes. Separin contains an N-terminal HEAT/ARM repeats which allows the protein to bind regulatory partners like securin and cyclin B1; followed by a TPR-like domain which binds phosphorylated residues and a C-terminal caspase-like protease domain which contains a catalytic triad (Cys-His-Asp) and recognises substrates with a conserved arginine at the P1 position [1,3]. The C-terminal domain is structurally related to caspases but includes a unique substrate-binding subdomain (PPD) [2,4].
Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
Cyclin-dependent kinase 1
G2/mitotic-specific cyclin-B1,G2/mitotic-specific cyclin-B1
Cyclin-dependent kinases regulatory subunit 1
Securin,Separin

Pharos: Disease Associations Pharos Homepage Annotation

ChainsDrug Target  Associated Disease
PharosP06493
PharosP14635
PharosP61024
PharosQ14674

Protein Modification Annotation

Modified Residue(s)
ChainResidue(s)Description
TPO Parent Component: THR

RESIDAA0038

PSI-MOD :  O-phospho-L-threonine MOD:00047
SEP Parent Component: SER

RESIDAA0038 , AA0037

PSI-MOD :  O-phospho-L-threonine MOD:00047 , O-phospho-L-serine MOD:00046