SOLO: a Meiotic Protein Required for Centromere Cohesion, Coorientation, and SMC1 Localization in Drosophila Melanogaster

Overview

Journal J Cell Biol

Specialty Cell Biology

Date 2010 Feb 10

PMID 20142422

Citations 23

Authors

Rihui Yan

Sharon E Thomas

Jui-he Tsai

Yukihiro Yamada

Bruce D McKee

Affiliations

Soon will be listed here.

Abstract

Sister chromatid cohesion is essential to maintain stable connections between homologues and sister chromatids during meiosis and to establish correct centromere orientation patterns on the meiosis I and II spindles. However, the meiotic cohesion apparatus in Drosophila melanogaster remains largely uncharacterized. We describe a novel protein, sisters on the loose (SOLO), which is essential for meiotic cohesion in Drosophila. In solo mutants, sister centromeres separate before prometaphase I, disrupting meiosis I centromere orientation and causing nondisjunction of both homologous and sister chromatids. Centromeric foci of the cohesin protein SMC1 are absent in solo mutants at all meiotic stages. SOLO and SMC1 colocalize to meiotic centromeres from early prophase I until anaphase II in wild-type males, but both proteins disappear prematurely at anaphase I in mutants for mei-S332, which encodes the Drosophila homologue of the cohesin protector protein shugoshin. The solo mutant phenotypes and the localization patterns of SOLO and SMC1 indicate that they function together to maintain sister chromatid cohesion in Drosophila meiosis.

Citing Articles

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