RGD Reference Report - Kinesin-related proteins in the mammalian testes: candidate motors for meiosis and morphogenesis. - Rat Genome Database

RGD Reference Report - Kinesin-related proteins in the mammalian testes: candidate motors for meiosis and morphogenesis. - Rat Genome Database

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Kinesin-related proteins in the mammalian testes: candidate motors for meiosis and morphogenesis.
Authors:	Sperry, AO Zhao, LP
Citation:	Sperry AO and Zhao LP, Mol Biol Cell 1996 Feb;7(2):289-305.
RGD ID:	633050
Pubmed:	PMID:8688559 (View Abstract at PubMed)
PMCID:	PMC275880 (View Article at PubMed Central)
The kinesin superfamily of molecular motors comprises proteins that participate in a wide variety of motile events within the cell. Members of this family share a highly homologous head domain responsible for force generation attached to a divergent tail domain thought to couple the motor domain to its target cargo. Many kinesin-related proteins (KRPs) participate in spindle morphogenesis and chromosome movement in cell division. Genetic analysis of mitotic KRPs in yeast and Drosophila, as well as biochemical experiments in other species, have suggested models for the function of KRPs in cell division, including both mitosis and meiosis. Although many mitotic KRPs have been identified, the relationship between mitotic motors and meiotic function is not clearly understood. We have used sequence similarity between mitotic KRPs to identify candidates for meiotic and/or mitotic motors in a vertebrate. We have identified a group of kinesin-related proteins from rat testes (termed here testes KRP1 through KRP6) that includes new members of the bimC and KIF2 subfamilies as well as proteins that may define new kinesin subfamilies. Five of the six testes KRPs identified are expressed primarily in testes. Three of these are expressed in a region of the seminiferous epithelia (SE) rich in meiotically active cells. Further characterization of one of these KRPs, KRP2, showed it to be a promising candidate for a motor in meiosis: it is localized to a meiotically active region of the SE and is homologous to motor proteins associated with the mitotic apparatus. Testes-specific genes provide the necessary probes to investigate whether the motor proteins that function in mammalian meiosis overlap with those of mitosis and whether motor proteins exist with functions unique to meiosis. Our search for meiotic motors in a vertebrate testes has successfully identified proteins with properties consistent with those of meiotic motors in addition to uncovering proteins that may function in other unique motile events of the SE.

Objects referenced in this article

Gene	Kif11	kinesin family member 11	Rattus norvegicus
Gene	Kif27	kinesin family member 27	Rattus norvegicus
Gene	Kif2c	kinesin family member 2C	Rattus norvegicus
Gene	Kif6	kinesin family member 6	Rattus norvegicus

Additional Information