DNAJ1 — Cucumis sativus

Summary

CSA_5G613470 (DNAJ1) on cucumber chromosome 5 encodes a DnaJ/Hsp40 family protein with a J domain, cysteine-rich domain and ATPase activator activity, binding Hsp70 and other chaperones. It is associated with protein folding, refolding and oxidation, S-nitrosylation, cellular responses to heat, auxin transport, calcium signaling, ethylene anabolism, stomatal movement and closure, chlorophyll fluorescence, carbohydrate metabolism, organogenesis, abscission and adventitious root development. The gene has been linked to abscisic acid content, leaf chlorophyll content, proline content and drought tolerance. It localises to the ER lumen, membrane, cytosol, plasmalemma and nucleus. Studies of related DnaJ proteins in other species connect the family to similar chaperone and stress-response functions.