mRNA-binding protein involved in proper cytoplasmic distribution of mitochondria (By similarity) (PubMed:14617080). Together with REC2, REC3 and FMT/CLU, contributes to the establishment of the cellular volume devoted to the chloroplast compartment (PubMed:26862170). Causes mitochondria to cluster within cells (PubMed:14617080). Reduced proportion of the cellular volume devoted to chloroplasts leading to an abnormal chloroplasts distributions (PubMed:26862170). Lower levels of chlorophyll, especially in plants lacking REC1, REC2, REC3 and FMT/CLU (PubMed:26862170). Belongs to the CLU family.