HSP70 — Nicotiana attenuata

Summary

A4A49_24002 (HSP70) in coyote tobacco (Nicotiana attenuata) encodes a heat shock protein 70 family member with ATP hydrolase activity, ATP binding, heat shock protein binding, and protein folding chaperone functions. This gene is associated with response to stress, heat, virus, and defense, as well as protein refolding, viral translation, calcium signaling, signal transduction, leaf senescence, cell division, phytochelatin anabolism, iron-sulfur cluster assembly, endosome-to-vacuole transport, and virus-induced PTGS. It localizes to the cytoplasm, membrane, chloroplast stroma, mitochondria, and axonemal central pair projection. This gene is associated with seed weight, seed size, lignin content, photosynthetic rate, stomatal resistance, and chlorophyll content. Studies of related genes in other species link the family to drought tolerance, plant height, fruit size, leaf trichome density, and hydrogen peroxide content.