One of the methods of mRNA localization, for example, is random diffusion of mRNAs where the mRNA binding proteins are localized to a certain part of the cell. However, I was taught that the ribosome can translate mRNAs before they've even finished being exported from the nucleus. So what stops localized mRNAs from being translated all over the cell before they reach their designated location?
I was thinking maybe they're bound by hnRNPs that inhibit their translation, which dissociate when they're bound by localized mRNA binding proteins, but I could be wrong.
Or is it that they are translated all over the cell, but the concentration at their locale is just way higher in their locale?