Intracellular and intercellular transport of many germ cell mRNAs is mediated by the DNA- and RNA-binding protein, testis-brain-RNA-binding protein (TB-RBP).
Functions ranging from RNA transport and translational regulation to DNA rearrangement and repair have been proposed for the DNA- and RNA-binding protein, testis-brain-RNA-binding protein (TB-RBP). TB-RBP is primarily in the nuclei of male germ cells during meiosis and in the cytoplasm of male cells after metaphase I of meiosis. Based on its shift in subcellular locations as germ cells differentiate and its binding to microtubules and microfilaments, a model is presented proposing an involvement of TB-RBP in mRNA transport from nucleus to cytoplasm and in the sharing of mRNAs transcribed from the sex chromosomes by movement through intercellular bridges of germ cells.
Hecht
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NB
Center for Research on Reproduction and Women's Health, University of Pennsylvania School of Medicine, Philadelphia 19104-6142, USA.
D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism; D003593:Cytoplasm / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000378:metabolism*; D005260:Female; D006801:Humans; D008297:Male; D008869:Microtubule-Associated Proteins / Q000378:metabolism*; D008957:Models, Genetic; D011485:Protein Binding; D012333:RNA, Messenger / Q000378:metabolism*; D016601:RNA-Binding Proteins / Q000378:metabolism*; D013094:Spermatozoa / Q000166:cytology / Q000378:metabolism* / Q000648:ultrastructure
D004268:DNA-Binding Proteins; D008869:Microtubule-Associated Proteins; D012333:RNA, Messenger; D016601:RNA-Binding Proteins; C490551:STRBP protein, human; C095563:TSN protein, human