A GFP trap study uncovers the functions of Gilgamesh protein kinase in Drosophila melanogaster spermatogenesis.

Abstract:

:The function of the gene gilgamesh (89B9-12) encoding a casein kinase in Drosophila spermatogenesis was studied. The chimeric Gilgamesh-GFP protein in spermatocytes is cortically located. In the polar and apolar spermatocytes, it concentrates at the terminal ends of the fusome, the organelle that passes through the system of ring canals of the spermatocyte cyst. At the stage of spermatid elongation, the protein associates with the nucleus. A spot of the highest Gilgamesh-GFP concentration in the nucleus co-localizes with gamma-tubulin in the basal body. At later stages, Gilgamesh is localized to the individualization complex (IC), leaving the nuclei somewhat before the IC investment cones, as detected by actin binding. The sterile mutation due to the gilgamesh gene leads to the phenotype of scattered nuclei and altered structure of actin cones in the individualizing spermatid cyst. Ultrastructural evidence confirmed defective spermatid individualization due to the mutation. The phylogenetic origin of the protein, and the connection between vesicular trafficking and spermatid individualization, are discussed.

journal_name

Cell Biol Int

authors

Nerusheva OO,Dorogova NV,Gubanova NV,Yudina OS,Omelyanchuk LV

doi

10.1016/j.cellbi.2009.02.009

subject

Has Abstract

pub_date

2009-05-01 00:00:00

pages

586-93

issue

5

eissn

1065-6995

issn

1095-8355

pii

S1065-6995(09)00056-0

journal_volume

33

pub_type

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