Biological process

Any signaling pathway that modulates the activity of a cell cycle cyclin-dependent protein kinase to modulate the switch from G1 phase to S phase of the mitotic cell cycle.

Note that this process is usually achieved by the regulation of the G1 cyclin-dependent protein kinase, consider annotating to the child term 'regulation of cyclin-dependent protein kinase activity involved in G1/S ; GO:0031657'.