Display Settings:

Format

Send to:

Choose Destination
We are sorry, but NCBI web applications do not support your browser and may not function properly. More information
    Cell Cycle. 2006 Feb;5(4):405-15. Epub 2006 Feb 15.

    Preventing fatal destruction: inhibitors of the anaphase-promoting complex in meiosis.

    Source

    Institute of Microbiology and Genetics,Georg-August-University, Göttingen, Germany. sirnige@gwdg.de

    Abstract

    The anaphase-promoting complex/cyclosome (APC/C) is a multi-subunit ubiquitin-ligase whose major functions in the cell cycle are the initiation of sister chromatid separation and the inactivation of cyclin-dependent kinases. This complex is also essential for meiosis, a specialized form of the cell cycle characterized by two consecutive rounds of chromosome segregation. To ensure a proper meiotic cell cycle, the activity of APC/C needs to be tightly controlled. It is now evident that inhibitors of APC/C play pivotal roles to avert its untimely activation. During prophase I, this ubiquitin-ligase must be kept inactive to prevent precocious sister chromatid separation. Studies in yeast showed that this inhibition is mediated by a specific subunit of the complex. Accurate chromosome segregation in meiosis I depends on spindle checkpoint proteins such as Mad2 which delay APC/C activation in response to an erroneous spindle attachment of chromosomes. Additional APC/C antagonists are known to block complete cyclin destruction between meiosis I and II, thereby ensuring that cyclin dependent kinases remain active and that DNA replication does not occur. Inhibitors of APC/C also mediate the cytostatic factor induced metaphase II arrest of oocytes. This review highlights the current knowledge about the role and relevance of these diverse regulators of the meiotic APC/C.

    PMID:
    16479160
    [PubMed - indexed for MEDLINE]
    Free full text

      Supplemental Content

      Icon for Landes Bioscience

      Save items

      Recent activity

      Your browsing activity is empty.

      Activity recording is turned off.

      Turn recording back on

      See more...
      Write to the Help Desk