Chromosome Research

, Volume 21, Issue 1, pp 49–62

Hypermorphic expression of centromeric retroelement-encoded small RNAs impairs CENP-A loading

  • Dawn M. Carone
  • Chu Zhang
  • Laura E. Hall
  • Craig Obergfell
  • Benjamin R. Carone
  • Michael J. O’Neill
  • Rachel J. O’Neill
Article

DOI: 10.1007/s10577-013-9337-0

Cite this article as:
Carone, D.M., Zhang, C., Hall, L.E. et al. Chromosome Res (2013) 21: 49. doi:10.1007/s10577-013-9337-0

Abstract

The proper functioning of centromeres requires a complex cascade of epigenetic events involving chromatin and kinetochore assembly; however, the precise mechanism by which this cascade proceeds is unknown. The pivotal event during kinetochore formation is the “loading,” or deposition, of CENP-A. This histone H3 variant is specific to centromeres and replaces conventional H3 in centromeric chromatin. Failure to load CENP-A into mammalian centromeres in late telophase/early G1 of the cell cycle leads to malsegregation and cell division defects in subsequent cell cycles. Mounting evidence supports the hypothesis that an RNA component is involved, although how RNAs participate in centromere formation in mammals has remained unknown. Using the marsupial model, the tammar wallaby, we show that centromeric retroelements produce small RNAs and that hypermorphic expression of these centromeric small RNAs results in disruption of CENP-A localization. We propose that tight regulation of the processing of this new class of small RNAs, crasiRNAs, is an integral component of the epigenetic framework necessary for centromere establishment.

Keywords

Centromere CENP-A Centromeric retroement Centromeric transcription Small RNA crasiRNA 

Abbreviations

CENP

Centromere protein

siRNA

Small interfering RNA

RNAi

RNA interference

dsRNA

Double-stranded RNA

KERV

Kangaroo endogenous retrovirus

kLTR

KERV long terminal repeat

crasiRNA

Centromere repeat-associated short interacting RNA

H3

Histone 3

miRNA

MicroRNA

piRNA

Piwi interacting RNA

IVT

In vitro transcription

IC

Immunochemistry

FITC

Fluorescein isothiocyanate

N.A.

Numerical aperture

FACS

Fluorescence activated cell sorting

RISC

RNA-induced silencing complex

LNA

Locked nucleic acid

miSAT

Minor satellite

LINE

Long interspersed nuclear element

HAC

Human artificial chromosome

HJURP

Holliday junction recognition protein

ACA

Anti-centromere antibody

PKR

Protein kinase R

Supplementary material

10577_2013_9337_MOESM1_ESM.doc (53 kb)
ESM 1(DOC 53 kb)

Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Dawn M. Carone
    • 1
    • 2
  • Chu Zhang
    • 1
  • Laura E. Hall
    • 1
  • Craig Obergfell
    • 1
  • Benjamin R. Carone
    • 3
  • Michael J. O’Neill
    • 1
  • Rachel J. O’Neill
    • 1
  1. 1.Department of Molecular and Cell BiologyUniversity of ConnecticutStorrsUSA
  2. 2.Department of Cell and Developmental BiologyUniversity of Massachusetts Medical SchoolWorcesterUSA
  3. 3.Department of Biochemistry and Molecular PharmacologyUniversity of Massachusetts Medical SchoolWorcesterUSA

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