Why Is Beta Sheet Pleated
The “Pleat” Occurs Because of the Alternating Planes of the Peptide Bonds Between Amino Acids; the Aligned Amino and Carbonyl Group of Each Opposite Segment...
The “pleat” occurs because of the alternating planes of the peptide bonds between amino acids; the aligned amino and carbonyl group of each opposite segment alternate their orientation from facing towards each other to facing opposite directions.
Why beta sheets are always pleated and twisted?
The twist is due to chiral (l)- amino acids in the extended plane. This chirality gives the twist and distorts H-bonding. A tug of war exists between conformational energies of the side chain and maximal H-bonding. Certain amino sequences have patterns to their folding.
Why are beta sheets zig zag?
The Beta-Sheet. Pauling and Corey derived a model for the conformation of fibrous proteins known as beta-keratins. In this conformation the polypeptide does not form a coil. Instead, it zig-zags in a more extended conformation than the alpha-helix.
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