CHS — Solanum lycopersicum

Summary

Tomato gene CHS (Solyc09g091510, also known as SlLAP5, SlLAP6, SlCHS1, SlCHS2, PKSA, PKSB) encodes a protein with chalcone/stilbene synthase and polyketide synthase type III domains, annotated with naringenin-chalcone synthase, chalcone isomerase, flavanone 4-reductase, dihydroflavanol 4-reductase, flavonol synthase, tetraketide alpha-pyrone synthase, acyltransferase, SUMO transferase, and protein-binding activities. In tomato, CHS1 is associated with parthenocarpic fruit development. The gene is linked to numerous fruit traits including weight, size, shape, firmness, dry weight, lycopene, carotene, neoxanthin, and carotenoid content, as well as flower color, stigma color, leaf color and thickness, stem width, lignin content, hydrogen peroxide levels, UV light sensitivity, and root phototropism. It is also associated with pollen exine development, male sterility, flavonoid and anthocyanin biosynthesis, pathogen and nematode resistance, drought and salt stress tolerance, and heterosis. The protein localizes to the cytosol, nucleus, endoplasmic reticulum, and tonoplast.