Function
Required in mushroom body gamma neurons for long-term memory in male courtship (PubMed:17965711, PubMed:23083740). Binds to mRNA 3'-UTRs (PubMed:20547833, PubMed:26638074, PubMed:24830287, PubMed:26095367). In its monomeric form, acts as a translational repressor of genes involved in neuronal growth, synapse formation and protein turnover (PubMed:20547833, PubMed:26638074). In its amyloid-like oligomeric form, acts as a translational activator (PubMed:26638074). The monomeric form reduces poly(A) tail length and destabilizes mRNA while the oligomeric form protects and elongates the poly(A) tail and stabilizes mRNA (PubMed:26638074). Isoform A is required for initial memory acquisition and, following subsequent late dopaminergic pathway activation, isoform A recruits isoform B into a complex to activate translation of CaMKII which is required for long-term memory consolidation (PubMed:26095367). Involved in asymmetric cell division in the central nervous system (PubMed:21900268). Required for the progression of spermatogenesis through meiosis and for sperm differentiation (PubMed:23209437). During sperm differentiation, required to asymmetrically localize and activate the translation of protein kinase aPKC mRNAs which is necessary for spermatid cyst polarization (PubMed:24830287). Also required during spermatid cyst polarization for localization and translation of its own mRNA (PubMed:24830287).
Sequence
MDSLKLPKANSATSSASGSNSNLSGSTSASASAATSPTSSGTAVGGILSGAPKSPPGLGSSTPISVRFNANEESLDDILQSFHHSKHSPSGGASGGGDASPTSNLLGMKNNGLGLVVGNCDSLSSSPSQPQMHAGSASLFGNDEVSLRNNFMQAGGFFNRKSCGGLPNLNLNKPPQLHQQQHQQQHQQHQQHQQQQQLHQHQQQLSPNLSALHHHHQQQQQLRESGGSHSPSSPGGGGGGSPYNGSQAGCSSGGISPIPPQMGVSPKYRRSISFPIKGNSPTAIYGNMHMDGMGSGHMNIPTLSIGNGGGGGSTGMVSAGATGGGDAPYLGNSYGNMMTSNGQMHHGGGLDNSLCDYMRNMSLGGNGGGDGSNSMSLMQDRMRVMGGPKHLSEADAMAIAASGNDPSVYLNALKMGSPSRLSPHSPHSPIQGGNGGNVGDGTARFSRKVFVGGLPPDIDEDEITTSFRRFGPLVVDWPHKAESKSYFPPKGYAFLLFQDESSVQQLIDSCITDEDKLYLCVSSPTIKDKAVQIRPWRLADADYVLDATMSLDPRKTVFVGGVPRPLKAFELAMIMDRLYGGVCYAGIDTDPELKYPKGAGRVAFSNQQSYIAAISARFVQLQHGDIDKRVEVKPYVLDDQMCDECEGQRCGGKFAPFFCANVTCLQYYCEHCWAVIHSRPGREYHKPLVKEGADRPRAVPFRWC