CAB — Nicotiana attenuata

Summary

A4A49_28400, designated CAB8 in coyote tobacco (Nicotiana attenuata) on chromosome scaffold02436, encodes a chlorophyll a-b binding protein of the light-harvesting complex family, annotated with dual-specificity protein kinase, MEKK activity, chlorophyll binding, and ATP binding functions. The gene is associated with photosynthesis, light harvesting in photosystem I, electron transport, pigmentation, photomorphogenesis, de-etiolation, stomatal closure, ethylene anabolism, sugar-mediated signalling, cell death, and acquisition of seed longevity. It localises to the photosystem I antenna complex, reaction centre, photosystem II, chloroplast thylakoid membrane, envelope, and stroma. Associations include chlorophyll content, seed longevity, leaf senescence, flowering time, root morphology, salt tolerance, reduced photosystem II yield, pale green colour, stunted growth, and reduced ABA sensitivity in germination and root elongation. Studies of related genes in other species link the family to leaf senescence and sugar response.