Author/Authors :
Galant، نويسنده , , Natalie J. and Song، نويسنده , , Heeyeon Cheryl and Jلkli، نويسنده , , Imre and Viskolcz، نويسنده , , Bela and Csizmadia، نويسنده , , Imre G. and Knak Jensen، نويسنده , , Svend J. and Perczel، نويسنده , , Andras، نويسنده ,
Abstract :
Electron structure calculations are used to explore stabilization effects of disulfide bridges in a (Ala–Cys–Ala–Cys–Ala)2 β-sheet model both in the parallel and the anti-parallel (103142 and 143102) arrangements. Stabilities were calculated using a redox reaction involving a weak oxidizing agent (1,4-benzoquinone). The results show that both inter- and intra-strand disulfide SS-bridges stabilize the β-sheet backbone fold. However, inter-strand SS-bridges give more stability than their intra-strand counterparts. For both single and double disulfide linked conformations, stabilization was larger for the parallel than for the anti-parallel β-sheet arrangements.
