The Serine/Threonine Phosphatase PP5 Interacts with CDC16 and CDC27, Two Tetratricopeptide Repeat-containing Subunits of the Anaphase-promoting Complex *
Journal of Biological Chemistry, ISSN: 0021-9258, Vol: 272, Issue: 51, Page: 32011-32018
1997
- 67Citations
- 22Captures
- 7Mentions
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Metrics Details
- Citations67
- Citation Indexes67
- 67
- CrossRef57
- Captures22
- Readers22
- 22
- Mentions7
- References7
- 7
Article Description
The evolutionarily conserved multisubunit complex known as the cyclosome or anaphase-promoting complex is involved in catalyzing the ubiquitination of diverse substrates in M phase, allowing their destruction by the 26 S proteasome and the completion of mitosis. Three of the eight subunits of the anaphase-promoting complex (CDC16, CDC23, and CDC27) have been shown to be phosphorylated in M phase, and their phosphorylation is required for the anaphase-promoting complex to be active as a ubiquitin ligase. Several subunits of the anaphase-promoting complex contain tetratricopeptide repeats, a protein motif involved in protein/protein interactions. PP5 is a serine/threonine phosphatase that also contains four copies of the tetratricopeptide repeats motif. Here we show by a combination of two-hybrid analysis and in vitro binding that PP5 interacts with CDC16 and CDC27, two subunits of the anaphase-promoting complex. Only the NH 2 -terminal domain of PP5, containing all four tetratricopeptide repeats, is required for this physical interaction. Deletion analysis suggests that the site of binding to PP5 is localized to the COOH-terminal block of tetratricopeptide repeats in CDC16 and CDC27. In addition, indirect immunofluorescence showed that PP5 localizes to the mitotic spindle apparatus. The direct interaction of PP5 with CDC16 and CDC27, as well as its overlapping spindle localization in mitosis, suggests that PP5 may be involved in the regulation of the activity of the anaphase-promoting complex.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0021925818397229; http://dx.doi.org/10.1074/jbc.272.51.32011; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0031437422&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/9405394; https://linkinghub.elsevier.com/retrieve/pii/S0021925818397229; https://dx.doi.org/10.1074/jbc.272.51.32011
Elsevier BV
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