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Human CDK4 / CMM3 Protein (GST Tag)

CMM3,PSK-J3

Catalog Number P10732-H09B
Organism Species Human
Host Baculovirus-Insect Cells
Synonyms CMM3,PSK-J3
Molecular Weight The recombinant human CDK4/GST chimera consists of 528 amino acids and predicts a molecular mass of 60 kDa. It migrates as an approximately 55 kDa band in SDS-PAGE under reducing conditions.
predicted N Met
SDS-PAGE
Purity > 90 % as determined by SDS-PAGE
Protein Construction A DNA sequence encoding the human CDK4 (NP_000066.1) (Met 1-Glu 303) was fused with the GST tag at the N-terminus.
Bio-activity No Kinase Activity
Research Area Immunology |Signal Transduction |Protein Kinase |Intracellular Kinase |Cyclin-Dependent Kinase (CDK)
Formulation Lyophilized from sterile 50mM Tris, 100mM NaCl, 10% gly, 0.5mM PMSF, pH 8.0
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
Background CDK4 is a member of the Ser/Thr protein kinase family. It is highly similar to the gene products of S. cerevisiae cdc28 and S. pombe cdc2. It is a catalytic subunit of the protein kinase complex that is important for cell cycle G1 phase progression. The activity of CDK4 is restricted to the G1-S phase, which is controlled by the regulatory subunits D-type cyclins and CDK inhibitor p16(INK4a). CDK4 was shown to be responsible for the phosphorylation of retinoblastoma gene product. CDK4 is the ser/Thr-kinase component of cyclin D-CDK4 (DC) complexes that phosphorylate and inhibit members of the retinoblastoma (RB) protein family including RB1 and regulate the cell-cycle during G(1)/S transition. Phosphorylation of RB1 allows dissociation of the transcription factor E2F from the RB/E2F complexes and the subsequent transcription of E2F target genes which are responsible for the progression through the G(1) phase. Hypophosphorylates RB1 in early G(1) phase. Cyclin D-CDK4 complexes are major integrators of various mitogenenic and antimitogenic signals. CDK4 has been shown to be mutated in some types of cancer, whilst a chromosomal rearrangement can lead to Cdk6 overexpression in lymphoma, leukemia and melanoma.
Reference
  • Stepanova L, et al. (1996) Mammalian p50Cdc37 is a protein kinase-targeting subunit of Hsp90 that binds and stabilizes Cdk4. Genes Dev. 10(12):1491-502.
  • Lamphere L, et al. (1997) Interaction between Cdc37 and Cdk4 in human cells. Oncogene. 14(16): 1999-2004.
  • Dai K, et al. (1996) Physical interaction of mammalian CDC37 with CDK4. J Biol Chem. 271(36): 22030-4.
  • Sugimoto M, et al. (1999) Regulation of CDK4 activity by a novel CDK4-binding protein, p34SEI-1. Genes Dev. 13(22):3027-33.