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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.

Rezumat:

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

URL: http://dx.doi.org/10.1088/1742-6596/182/1/012008