Mitochondrial heat soluble protein acting as a molecular shield in water-deficient condition. Contiguous repeats of the 11-mer LEA motif is characteristic of group 3 LEA proteins and form an amphipathic helical structure under water-deficient conditions (PubMed:25675104). Improves osmotic tolerance of human cells (PubMed:25675104). Belongs to the LEA type 4 family.