Table of ContentsPROTEIN AND PEPTIDE STRUCTURE* AA Stereochemistry, see also tutorial material More on Amino Acids, see also tutorial material Proteins fold into compact structures. rotation about main-chain bonds... THREE repeating torsion angles OMEGA angle tends to be planar Trans is generally favored over cis: Leaves phi and psi for flexible folding... When phi/psi torsion angles repeat Repeating Phi= -57, Psi= -47 gives... Stability of helical structure Cytochrome b562 is mostly helix Phi = -119, Psi = +113 gives... These structural elements defined by... another kind of secondary structure Proline is often found in turns... ...sometimes with cis peptide bonds Classification of Protein Folding: e.g. the two chains of insulin |
Author: John E. Wampler
Email: wampler@bchiris.bmb.uga.edu Home Page: http://bmbiris.bmb.uga.edu/wampler This presentation is also available on-line at http://bmbiris.bmb.uga.edu/wampler/isbw98/index.html * Additional tutorial material at http://bmbiris.bmb.uga.edu/wampler/tutorial
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