Genome-wide analysis reveals a cell cycle–dependent mechanism controlling centromere propagation
Journal Article
·
· Journal of Cell Biology
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Dept. of Genome Dynamics; Univ. of California, Berkeley, CA (United States). Dept. of Molecular and Cell Biology; Heidelberg Univ. (Germany). Zentrum für Molekulare Biologie; DOE/OSTI
- Department of Genome Dynamics, Lawrence Berkeley National Laboratory; Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720
- Stanford Stanford Univ., CA (United States). Medical School. Dept. of Biochemistry
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Dept. of Genome Dynamics; Univ. of California, Berkeley, CA (United States). Dept. of Molecular and Cell Biology
Centromeres are the structural and functional foundation for kinetochore formation, spindle attachment, and chromosome segregation. In this study, we isolated factors required for centromere propagation using genome-wide RNA interference screening for defects in centromere protein A (CENP-A; centromere identifier [CID]) localization in Drosophila melanogaster. We identified the proteins CAL1 and CENP-C as essential factors for CID assembly at the centromere. CID, CAL1, and CENP-C coimmunoprecipitate and are mutually dependent for centromere localization and function. We also identified the mitotic cyclin A (CYCA) and the anaphase-promoting complex (APC) inhibitor RCA1/Emi1 as regulators of centromere propagation. We show that CYCA is centromere localized and that CYCA and RCA1/Emi1 couple centromere assembly to the cell cycle through regulation of the fizzy-related/CDH1 subunit of the APC. Our findings identify essential components of the epigenetic machinery that ensures proper specification and propagation of the centromere and suggest a mechanism for coordinating centromere inheritance with cell division.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- National Institutes of Health (NIH); USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1625150
- Journal Information:
- Journal of Cell Biology, Journal Name: Journal of Cell Biology Journal Issue: 5 Vol. 183; ISSN 0021-9525
- Publisher:
- Rockefeller University PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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