Cell cycle regulators, also known as cell cycle control proteins, are critical to the health of an organism because they ensure that cell division proceeds in a controlled and orderly manner. These proteins control the progression of the cell through the different stages of the cell cycle, including interphase (G1, S, G2) and the mitotic phase (M).
During interphase, cell cycle regulators help to ensure that DNA is replicated accurately and that any damage is repaired. They also help to ensure that cells have enough energy and resources to divide. In the mitotic phase, cell cycle regulators help to ensure that the chromosomes are properly aligned and separated during cell division.
If cell division is allowed to proceed without being regulated, it can lead to a number of problems. For example, cells may divide uncontrollably, leading to the formation of tumors or cancer. Uncontrolled cell division can also lead to the formation of abnormal cells, which can impair the functioning of the organism. Additionally, unregulated cell division can cause chromosomal abnormalities, leading to genetic disorders and developmental defects.