MOLECULAR MODELING OF TWO HEXAPEPTIDE REPEAT MOTIFS OF HMW GLUTENIN SUBUNITS

Handan Arkin, Fati̇h Yaşar, Tarik Çeli̇k (), Süeda Çeli̇k and Hami̇t Köksel
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Handan Arkin: Department of Physics Engineering, Hacettepe University, Ankara, Turkey
Fati̇h Yaşar: Department of Physics Engineering, Hacettepe University, Ankara, Turkey
Tarik Çeli̇k: Department of Physics Engineering, Hacettepe University, Ankara, Turkey
Süeda Çeli̇k: Department of Food Engineering, Hacettepe University, Ankara, Turkey
Hami̇t Köksel: Department of Food Engineering, Hacettepe University, Ankara, Turkey

International Journal of Modern Physics C (IJMPC), 2001, vol. 12, issue 02, 281-292

Abstract: The three-dimensional structures of two hexapeptide repeat motifs (PGQGQQ and SGQGQQ, in one letter code) in the repetitive central domain of HMW glutenin subunits are investigated by using the multicanonical simulation procedure. Ramachandran plots were prepared and analyzed to predict the relative occurrence probabilities ofβ-turn andγ-turn structures and helical state. Structural predictions of PGQGQQ repeat motif indicated the presence of high level ofβ-turns and considerable level ofγ-turns. Simulations of the repeat motifs in the repetitive central domain of HMW glutenin subunits indicated that these structures take important part in the three-dimensional structures of repeat motifs.

Keywords: HMW Glutenin; Molecular Modeling of Secondary Structures; Multicanonical Simulation; Proteins; Peptides; Energy Minimization (search for similar items in EconPapers)
Date: 2001
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DOI: 10.1142/S0129183101001675

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