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Updated: Jun 25, 2026

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CENP-A targeting moves a step back.

Richard E Baker1

  • 1Department of Molecular Genetics and Microbiology, University of Massachusetts Medical School, Worcester, MA 01655, USA. richard.baker@umassmed.edu

Molecular Cell
|March 3, 2009
PubMed
Summary
This summary is machine-generated.

Researchers identified the S. pombe Scm3 protein as key in depositing the centromere-specific histone variant Cnp1/CENP-A. This finding links Scm3 directly to the Mis16-Mis18 complex at the centromere.

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Published on: June 10, 2020

Area of Science:

  • Cell Biology
  • Epigenetics
  • Molecular Biology

Background:

  • Centromere identity is maintained by the histone H3 variant, Cnp1/CENP-A.
  • The precise mechanism of Cnp1/CENP-A deposition remains incompletely understood.
  • The Mis16-Mis18 complex is known to be involved in centromere function.

Purpose of the Study:

  • To identify the protein responsible for the initial steps of Cnp1/CENP-A deposition.
  • To elucidate the connection between centromeric factors and the Cnp1/CENP-A pathway.

Main Methods:

  • Genetic analysis in Schizosaccharomyces pombe (S. pombe).
  • Protein interaction studies.
  • Analysis of centromere localization and function.

Main Results:

  • S. pombe Scm3 was identified as the key factor mediating Cnp1/CENP-A deposition.
  • Scm3 acts proximally in the deposition pathway.
  • A direct link was established between Scm3 and the centromere-localized Mis16-Mis18 complex.

Conclusions:

  • Scm3 is essential for the correct deposition of Cnp1/CENP-A at centromeres.
  • This study provides a crucial link between centromere-binding proteins and the Cnp1/CENP-A pathway.
  • Understanding Scm3 function is vital for comprehending centromere inheritance and stability.