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A unique expression pattern for a sperm membrane protein during sea urchin spermatogenesis

Published online by Cambridge University Press:  26 September 2008

Rita D. Ward ,
Lisa M. Mendoza ,
Gary W. Moy ,
Victor D. Vacquier  and
David Nishioka
Rita D. Ward
Affiliation:
Department of Biology, Georgetown University, Washington, DC and Scripps Institution of Oceanography, La Jolla, California, USA
Lisa M. Mendoza
Affiliation:
Department of Biology, Georgetown University, Washington, DC and Scripps Institution of Oceanography, La Jolla, California, USA
Gary W. Moy
Affiliation:
Department of Biology, Georgetown University, Washington, DC and Scripps Institution of Oceanography, La Jolla, California, USA
Victor D. Vacquier
Affiliation:
Department of Biology, Georgetown University, Washington, DC and Scripps Institution of Oceanography, La Jolla, California, USA
David Nishioka*
Affiliation:
Department of Biology, Georgetown University, Washington, DC and Scripps Institution of Oceanography, La Jolla, California, USA
*
Dr David Nishioka, Department of Biology, Georgetown University, Washington, DC 20057-1028, USA. Tel: 202/687-5888. Fax: 202/687-5662.
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Summary

Specific mRNAs coding for a 63 kDa sperm membrane protein (63-SMP) were localised in Strongylocentrotus purpuratus testis sections using in situ hybridisation techniques. 35S-labelled antisense RNA probes transcribed from a 766 base pair fragment of the gene coding for the 63-SMP hybridised to all spermatogenic cells in the basal germinal epithelia of testicular acini, except the most peripherally located (least differentiated) spermatogonia. No hybridisation to the luminally located mature spermatozoa or somatic cells of the testis was observed. Using monoclonal antibody J17/30 and indirect immunofluorescence techniques, the 63-SMP was localised to the same subset of spermatogenic cells that contain the 63-SMP mRNA, suggesting that expression of this gene is transcriptionally controlled. In combination with previous studies on the expression of sperm histones and sperm bindin, these results show that multiple, perhaps sequential, classes of gene activity contribute to the differentiation of sea urchin sperm.

Keywords

Gene expressionIn situ hybridisationSea urchinSpermatogenesisSperm proteins
Type
Article
Information
Zygote , Volume 2 , Issue 2 , May 1994 , pp. 159 - 165
Copyright
Copyright © Cambridge University Press 1994

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