Function and Biology

Structural mechanism for the inhibition of CDK5-p25 by roscovitine, aloisine and indirubin.

EC 2.7.11.1: Non-specific serine/threonine protein kinase

Reaction catalysed:
ATP + a protein = ADP + a phosphoprotein
Systematic name:
ATP:protein phosphotransferase (non-specific)
Alternative Name(s):
  • A-kinase
  • AP50 kinase
  • ATP-protein transphosphorylase
  • Beta-IIPKC
  • Beta-adrenergic receptor kinase
  • CK-2
  • CKI
  • CKII
  • Calcium-dependent protein kinase C
  • Calcium/phospholipid-dependent protein kinase
  • Casein kinase
  • Casein kinase (phosphorylating)
  • Casein kinase 2
  • Casein kinase I
  • Casein kinase II
  • Cyclic AMP-dependent protein kinase
  • Cyclic AMP-dependent protein kinase A
  • Cyclic monophosphate-dependent protein kinase
  • Cyclic nucleotide-dependent protein kinase
  • Cyclin-dependent kinase
  • Cytidine 3',5'-cyclic monophosphate-responsive protein kinase
  • Dsk1
  • Epsilon PKC
  • Glycogen synthase A kinase
  • Glycogen synthase a kinase
  • Glycogen synthase kinase
  • HIPK2
  • Hpr kinase
  • Hydroxyalkyl-protein kinase
  • M phase-specific cdc2 kinase
  • MAPK
  • Mitogen-activated S6 kinase
  • Mitogen-activated protein kinase
  • P82 kinase
  • PKA
  • PKC
  • Phosphorylase B kinase kinase
  • Phosphorylase b kinase kinase
  • Phosphorylase b kinase kinase
  • Protein glutamyl kinase
  • Protein kinase (phosphorylating)
  • Protein kinase A
  • Protein kinase CK2
  • Protein kinase p58
  • Protein phosphokinase
  • Protein serine kinase
  • Protein serine-threonine kinase
  • Protein-aspartyl kinase
  • Protein-cysteine kinase
  • Protein-serine kinase
  • Prp4 protein kinase
  • Raf kinase
  • Raf-1
  • Ribosomal S6 protein kinase
  • Ribosomal protein S6 kinase II
  • STK32
  • Serine kinase
  • Serine protein kinase
  • Serine(threonine) protein kinase
  • Serine-specific protein kinase
  • Serine/threonine protein kinase
  • T-antigen kinase
  • Threonine-specific protein kinase
  • Twitchin kinase
  • Type-2 casein kinase
  • WEE1Hu
  • Wee 1-like kinase
  • Wee-kinase
  • cAMP-dependent protein kinase
  • cAMP-dependent protein kinase A
  • cGMP-dependent protein kinase

GO terms

Biochemical function:
Biological process:
Cellular component:

Sequence families

Pfam Protein families (Pfam)
PF03261
Domain description: Cyclin-dependent kinase 5 activator protein
Occurring in:
  1. Cyclin-dependent kinase 5 activator 1, p25
The deposited structure of PDB entry 1unh contains 2 copies of Pfam domain PF03261 (Cyclin-dependent kinase 5 activator protein) in Cyclin-dependent kinase 5 activator 1, p25. Showing 1 copy in chain C [auth D].

PF00069
Domain description: Protein kinase domain
Occurring in:
  1. Cyclin-dependent kinase 5
The deposited structure of PDB entry 1unh contains 2 copies of Pfam domain PF00069 (Protein kinase domain) in Cyclin-dependent kinase 5. Showing 1 copy in chain A.

InterPro InterPro annotations
IPR004944
Domain description: Cyclin-dependent kinase 5 activator
Occurring in:
  1. Cyclin-dependent kinase 5 activator 1, p25
IPR036915
Domain description: Cyclin-like superfamily
Occurring in:
  1. Cyclin-dependent kinase 5 activator 1, p25
IPR008271
Domain description: Serine/threonine-protein kinase, active site
Occurring in:
  1. Cyclin-dependent kinase 5
IPR017441
Domain description: Protein kinase, ATP binding site
Occurring in:
  1. Cyclin-dependent kinase 5
IPR000719
Domain description: Protein kinase domain
Occurring in:
  1. Cyclin-dependent kinase 5
IPR011009
Domain description: Protein kinase-like domain superfamily
Occurring in:
  1. Cyclin-dependent kinase 5

Structure domains

CATH CATH domains
1.10.472.10
Class: Mainly Alpha
Architecture: Orthogonal Bundle
Topology: Cyclin A; domain 1
Homology: Cyclin-like
Occurring in:
  1. Cyclin-dependent kinase 5 activator 1, p25
The deposited structure of PDB entry 1unh contains 2 copies of CATH domain 1.10.472.10 (Cyclin A; domain 1) in Cyclin-dependent kinase 5 activator 1, p25. Showing 1 copy in chain C [auth D].
1.10.510.10
Class: Mainly Alpha
Architecture: Orthogonal Bundle
Topology: Transferase(Phosphotransferase); domain 1
Homology: Transferase(Phosphotransferase) domain 1
Occurring in:
  1. Cyclin-dependent kinase 5
The deposited structure of PDB entry 1unh contains 2 copies of CATH domain 1.10.510.10 (Transferase(Phosphotransferase); domain 1) in Cyclin-dependent kinase 5. Showing 1 copy in chain A.
3.30.200.20
Class: Alpha Beta
Architecture: 2-Layer Sandwich
Topology: Phosphorylase Kinase; domain 1
Homology: Phosphorylase Kinase; domain 1
Occurring in:
  1. Cyclin-dependent kinase 5
The deposited structure of PDB entry 1unh contains 2 copies of CATH domain 3.30.200.20 (Phosphorylase Kinase; domain 1) in Cyclin-dependent kinase 5. Showing 1 copy in chain A.
SCOP SCOP annotations
47955
Class: All alpha proteins
Fold: Cyclin-like
Superfamily: Cyclin-like
Occurring in:
  1. Cyclin-dependent kinase 5 activator 1, p25
The deposited structure of PDB entry 1unh contains 2 copies of SCOP domain 47955 (Cyclin) in Cyclin-dependent kinase 5 activator 1, p25. Showing 1 copy in chain C [auth D].
88854
Class: Alpha and beta proteins (a+b)
Fold: Protein kinase-like (PK-like)
Superfamily: Protein kinase-like (PK-like)
Occurring in:
  1. Cyclin-dependent kinase 5
The deposited structure of PDB entry 1unh contains 2 copies of SCOP domain 88854 (Protein kinases, catalytic subunit) in Cyclin-dependent kinase 5. Showing 1 copy in chain A.