TWGFD

Welcome to Expansins !

Expansin proteins normally contain 250-275 amino acid residues, which consists of two domains: N-terminal domain I with 120 to 135 amino acid residues and C-terminal domain II with 90 to 120 amino acids. A signal peptide of 20-30 amino acid residues is present at the N-terminus. Domain I, rich in cysteine, is considered as an important catalytic domain. This region shares some homology with the catalytic domain of the β-1,4-D-endo-glucanase from Trichoderma. The expression of plant expansin genes has obvious tissue specificity. Functional studies have shown that expansins are involved in many developmental processes such as plant growth, root hair growth, leaf growth, fruit softening and ripening, seed size and germination, pollen tube growth and salinity stress response.