Fission yeast Csk1 is a CAK-activating kinase (CAKAK). 1998

D Hermand, and A Pihlak, and T Westerling, and V Damagnez, and J Vandenhaute, and G Cottarel, and T P Mäkelä
Haartman Institute and Biocentrum Helsinki, University of Helsinki, Haartmaninkatu 3, 00014 Helsinki, Finland.

Cell cycle progression is dependent on the sequential activity of cyclin-dependent kinases (CDKs). For full activity, CDKs require an activating phosphorylation of a conserved residue (corresponding to Thr160 in human CDK2) carried out by the CDK-activating kinase (CAK). Two distinct CAK kinases have been described: in budding yeast Saccharomyces cerevisiae, the Cak1/Civ1 kinase is responsible for CAK activity. In several other species including human, Xenopus, Drosophila and fission yeast Schizosaccharomyces pombe, CAK has been identified as a complex homologous to CDK7-cyclin H (Mcs6-Mcs2 in fission yeast). Here we identify the fission yeast Csk1 kinase as an in vivo activating kinase of the Mcs6-Mcs2 CAK defining Csk1 as a CAK-activating kinase (CAKAK).

UI MeSH Term Description Entries
D010766 Phosphorylation The introduction of a phosphoryl group into a compound through the formation of an ester bond between the compound and a phosphorus moiety. Phosphorylations
D011494 Protein Kinases A family of enzymes that catalyze the conversion of ATP and a protein to ADP and a phosphoprotein. Protein Kinase,Kinase, Protein,Kinases, Protein
D002453 Cell Cycle The complex series of phenomena, occurring between the end of one CELL DIVISION and the end of the next, by which cellular material is duplicated and then divided between two daughter cells. The cell cycle includes INTERPHASE, which includes G0 PHASE; G1 PHASE; S PHASE; and G2 PHASE, and CELL DIVISION PHASE. Cell Division Cycle,Cell Cycles,Cell Division Cycles,Cycle, Cell,Cycle, Cell Division,Cycles, Cell,Cycles, Cell Division,Division Cycle, Cell,Division Cycles, Cell
D004789 Enzyme Activation Conversion of an inactive form of an enzyme to one possessing metabolic activity. It includes 1, activation by ions (activators); 2, activation by cofactors (coenzymes); and 3, conversion of an enzyme precursor (proenzyme or zymogen) to an active enzyme. Activation, Enzyme,Activations, Enzyme,Enzyme Activations
D000095043 Cyclin-Dependent Kinase-Activating Kinase A highly-conserved cyclin-dependent kinase that activates other CYCLIN DEPENDENT KINASES and plays a key role in regulation of the CELL CYCLE. CDK-Activating Kinase,Cyclin Dependent Kinase Activating Kinase,P34CDC2 Activating Kinase,Activating Kinase, P34CDC2,Kinase, Cyclin-Dependent Kinase-Activating,Kinase, P34CDC2 Activating,Kinase-Activating Kinase, Cyclin-Dependent
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D012568 Schizosaccharomyces A genus of ascomycetous fungi of the family Schizosaccharomycetaceae, order Schizosaccharomycetales. Fission Yeast,Schizosaccharomyces malidevorans,Schizosaccharomyces pombe,Yeast, Fission,S pombe,Fission Yeasts
D016153 Genes, Suppressor Genes that have a suppressor allele or suppressor mutation (SUPPRESSION, GENETIC) which cancels the effect of a previous mutation, enabling the wild-type phenotype to be maintained or partially restored. For example, amber suppressors cancel the effect of an AMBER NONSENSE MUTATION. Amber Suppressor Genes,Frameshift Suppressor Genes,Genes, Amber Suppressor,Genes, Frameshift Suppressor,Genes, Nonsense Mutation Suppressor,Genes, Ochre Suppressor,Genes, Second-Site Suppressor,Nonsense Mutation Suppressor Genes,Ochre Suppressor Genes,Second-Site Suppressor Genes,Genes, Opal Suppressor,Suppressor Genes,Amber Suppressor Gene,Frameshift Suppressor Gene,Gene, Amber Suppressor,Gene, Frameshift Suppressor,Gene, Ochre Suppressor,Gene, Opal Suppressor,Gene, Second-Site Suppressor,Gene, Suppressor,Genes, Second Site Suppressor,Ochre Suppressor Gene,Opal Suppressor Gene,Opal Suppressor Genes,Second Site Suppressor Genes,Second-Site Suppressor Gene,Suppressor Gene,Suppressor Gene, Amber,Suppressor Gene, Frameshift,Suppressor Gene, Ochre,Suppressor Gene, Opal,Suppressor Gene, Second-Site,Suppressor Genes, Amber,Suppressor Genes, Frameshift,Suppressor Genes, Ochre,Suppressor Genes, Opal,Suppressor Genes, Second-Site
D016213 Cyclins A large family of regulatory proteins that function as accessory subunits to a variety of CYCLIN-DEPENDENT KINASES. They generally function as ENZYME ACTIVATORS that drive the CELL CYCLE through transitions between phases. A subset of cyclins may also function as transcriptional regulators. Cyclin
D017124 Conserved Sequence A sequence of amino acids in a polypeptide or of nucleotides in DNA or RNA that is similar across multiple species. A known set of conserved sequences is represented by a CONSENSUS SEQUENCE. AMINO ACID MOTIFS are often composed of conserved sequences. Conserved Sequences,Sequence, Conserved,Sequences, Conserved

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