Question

The plant heat stress transcription factor (hsf) family: structure, function and evolution

Answer 1

Too much longer answers so take help of ggle

Answer 2

Plants usually respond to unfavourable climatic conditions through the action of their specific genes called as Transcription factors.

Heat stress transcription factors (HSFs) are also a kind of transcription factor which helps the plant to respond to abiotic stress factors by regulating proteins like the Heat shock proteins, etc.

Compared to the vertebrates, the plants have many more HSFs that are classified based on the family and sub-family of the plant species.

A few HSFs have been identified in Arabidopsis, tomato, rice, wheat and soybean, carrot, and cotton.

The plant HSFs have a modular conserved structure in which the N-terminal DNA binding domain (DBD) has a central helix-turn-helix motif. This motif binds to the HSEs or the heat stress elements. The oligomerization domain (OD) has hydrophobic amino acid residues (HR-A/B region). Based on the number of amino acids that are present in the HR-A/B regions, the HSFs are divided into 3 classes - HSFA, B, and C. There are 21 amino acids inserted in the HSFA and 7 amino acids in HSFC.