Assembly of protein complexes with cyclin/Cdk is noted and the capacity of the cyclin-dependent kinase subunit Cks, in such complex, to extend the range of Cdk substrates is documented and discussed in terms of cell cycle regulation. Cell cycle progression involves changing abundance of individual...
Cyclin A is the ONLY cyclin that plays a role in regulation of two cell cycle stages. It can activate two CDKs – CDK2 and CDK1. When Cyclin A forms a complex with CDK2, it allows the cell to progress to S phase. Meanwhile, binding of Cyclin A to CDK1 allows entry into M phase...
Cyclin-dependent kinase 12 (CDK12) promotes transcriptional elongation by phosphorylation of the RNA polymerase II C-terminal domain (CTD). Structure-function studies show that this activity is dependent on a C-terminal kinase extension, as well as the b
A cyclin-binding motif in human papillomavirus type 18 (HPV18) E1^E4 is necessary for association with CDK–cyclin complexes and G2/M cell cycle arrest of keratinocytes, but is not required for differentiation-dependent viral genome amplification or L1 capsid protein expression ...
Formation and activation of a cyclin E-cdk2 complex during the G1 phase of the human cell cycle The major cyclin E-associated kinase in human cells was Cdk2 (cyclin-dependent kinase 2). The abundance of the cyclin E protein and the cyclin E-Cdk... A Koff,A Giordano,D Desai,... -...
This chapter primarily explores the understudied topic of CDK/cyclin complex functionality during the DNA damage response. We detail how CDK/cyclin complexes perform dual roles both as targets of DNA damage checkpoint signaling as well as effectors of DNA repair. Additionally, we discuss the ...
The dominant model for eukaryotic cell cycle control proposes that cell cycle progression is driven by a succession of CDK complexes with different substrate specificities. However, in fission yeast it has been shown that a single CDK complex generated b
CDK4/cyclin D3 serine/threonine kinase is dimeric protein complex. CDK4 is a member of the cyclin-dependent protein kinase family and is involved in the control of cell proliferation during the G1 phase of cell cycle. CDK4 forms a complex with the D-type cyclins and is inhibited by p16...
The trimeric complex of CDK7, cyclin H and MNAT1, functions as a Cdk-activating kinase (CAK). It is an essential component of the transcription factor TFIIH, that is involved in transcription initiation and DNA repair. This complex is thought to serve as a direct link between the regulation...
The cell could have then become addicted to this more complex CDK–cyclin network system such that the original CDK–cyclin complex was no longer effective at driving the mitotic and meiotic cell cycles. However, introduction of the Cdc13–Cdc2 fusion protein at an appropriate level of expression...