Acts as a negative regulator of entry into mitosis (G2 to M transition) by phosphorylation of the CDK1 kinase specifically when CDK1 is complexed to cyclins. Mediates phosphorylation of CDK1 predominantly on 'Thr-14'. Also involved in Golgi fragmentation. May be involved in phosphorylation of CDK1 on 'Tyr-15' to a lesser degree, however tyrosine kinase activity is unclear and may be indirect. May be a downstream target of Notch signaling pathway during eye development.
[1]Human Myt1 is a cell cycle-regulated kinase that inhibits Cdc2 but not Cdk2 activity.Booher R.N., Holman P.S., Fattaey A.J. Biol. Chem. 272:22300-22306(1997) [2]The human Myt1 kinase preferentially phosphorylates Cdc2 on threonine 14 and localizes t