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Analysis of the secondary structure of a protein’s N-terminal

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: C. G. Floare, M. Bogdan, O. Horovitz, A. Mocanu and M. Tomoaia-Cotisel

Editorial: Journal of Physics: Conference Series, 182, p.012008, 2009.


The major protein component from aleurone cells of barley (Hordeum vulgare L.), PACB, is related to 7S globulins present in other cereals and to the vicilin-type 7S globulins of legumes and cotton seed. It contains 4 subunits of about 20, 25, 40 and 50 kDa molecular weights. The N-terminal sequence of 16 amino acids (over 260 atoms) in the protein was previously determined, and our aim is the prediction of its secondary structure. The empirical Chou-Fasman method was applied in an improved version as well as the empirical DSC method (discrimination of protein secondary structure class) with quite similar results. A molecular dynamics simulation was also performed, using the FF99SB forcefield within AMBER version 9.0. Solvation effects were incorporated using the Born model. The results are compared and a 3D model is proposed.

Cuvinte cheie: folding of N-terminal, aleurone cells of barley, molecular dynamics