Abstract
Localization of mRNAs to subcellular domains can enrich proteins at sites where they function. Coordination with translational control can ensure that the encoded proteins will not appear elsewhere, an important property for factors that control cell fate or body patterning. Here I focus on two aspects of mRNA localization. One is the question of how mRNAs that undergo directed transport by a shared mechanism are bound to the transport machinery, and why localization signals from these mRNAs have very diverse sequences. The second topic concerns the role of particles, in which localized mRNAs often appear. Recent evidence highlights the importance of such assemblies, and the possibility that close association of mRNAs confers community effects and a novel form of regulation.
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