Protein Turns and Structural Motifs
Explore the key features of protein turns, including the characteristics of type I and type II turns, their structural elements, and the importance of amino acids like glycine and proline in protein folding. Discover the role of delta phi and delta psi angles in comparing different turn types, as illustrated in Figure 6-14.
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Presentation Transcript
The -turn (1__ - 2 PRO -3 GLY - __ ) a simple protein structural motif generally found on protein surfaces turns the backbone around by 180 degrees to fold back on itself links two anti-parallel two beta strands that are adjacent in primary structure, that are adjacent in secondary structure is a short loop of two to five amino acids frequently contains glycine at position 3, (small H side chain allows extreme phi-psi). frequently contains proline at position 2, (P forces the backbone into the appropriate conformation)
Make a table of delta phi/delta psi, to compare type I and type II Figure 6-14
