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A cell during anaphase. Microtubules are visible in green. Stages of late M phase in a vertebrate cell. Anaphase (from Ancient Greek ἀνα-() 'back, backward' and φάσις (phásis) 'appearance') is the stage of mitosis after the process of metaphase, when replicated chromosomes are split and the newly-copied chromosomes (daughter chromatids) are moved to opposite poles of the cell.
The cell division cycle protein 20 homolog is an essential regulator of cell division that is encoded by the CDC20 gene [5] [6] in humans. To the best of current knowledge its most important function is to activate the anaphase promoting complex (APC/C), a large 11-13 subunit complex that initiates chromatid separation and entrance into anaphase .
9700 105988 Ensembl ENSG00000135476 ENSMUSG00000058290 UniProt Q14674 P60330 RefSeq (mRNA) NM_012291 NM_001014976 NM_001356312 RefSeq (protein) NP_036423 NP_001014976 NP_001343241 Location (UCSC) Chr 12: 53.27 – 53.29 Mb Chr 15: 102.2 – 102.23 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Separase, also known as separin, is a cysteine protease responsible for triggering ...
Anaphase-promoting complex (also called the cyclosome or APC/C) is an E3 ubiquitin ligase that marks target cell cycle proteins for degradation by the 26S proteasome. The APC/C is a large complex of 11–13 subunit proteins , including a cullin ( Apc2 ) and RING ( Apc11 ) subunit much like SCF .
Securin is a protein involved in control of the metaphase-anaphase transition and anaphase onset. Following bi-orientation of chromosome pairs and inactivation of the spindle checkpoint system, the underlying regulatory system, which includes securin, produces an abrupt stimulus that induces highly synchronous chromosome separation in anaphase.
Cancer cells have been observed to divide in multiple directions by evading the spindle assembly checkpoint resulting in multipolar mitoses. [78] The multipolar metaphase-anaphase transition occurs through an incomplete separase cycle that results in frequent nondisjunction events which amplify aneuploidy in cancer cells.
Next, during anaphase, the kinetochore microtubules pull the sister chromatids apart into individual chromosomes and pull them towards the centrosomes, located at opposite ends of the cell. This allows the cell to divide properly with each daughter cell containing full replicas of chromosomes.
Anaphase lagging is the most common way by which mosaicism arises in the preimplantation embryo. [3] Mosaicism can also result from a mutation in one cell during development, in which case the mutation will be passed on only to its daughter cells (and will be present only in certain adult cells). [4]