CCH — Cucumis melo

Summary

MELO3C023131.2 (CmCCH) on melon chromosome 9 encodes a protein with magnesium chelatase activity, N-terminal asparagine amidohydrolase activity, superoxide dismutase copper carrier activity, and calcium-dependent protein kinase activity, belonging to the BchH and CobN/Mg_chltase families. The gene is associated with chlorophyll metabolism, regulation of stomatal opening, guard cell fate commitment, stigma development, and responses to carbon dioxide, low humidity, and absence of light. It localizes to the chloroplast membrane, thylakoid, and magnesium chelatase complex. Associations with agronomic traits include seed yield, biomass yield, water use efficiency, submergence tolerance, disease tolerance, carotenoid content, flowering time, and germination rate. Studies of related genes in other species link the family to chloroplast development, retrograde signaling, ABA perception, and freezing tolerance.