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AlphaBeta Loop

Motif Glossary

AlphaBeta Loop

Definition

A motif of five consecutive residues and two H-bonds in which there is:

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Sub-categories

Reference

Milner-White, unpublished

Comments

The AlphaBeta Loop replaces the AlphaBeta Motif which, although similar, implicitly restricted the motif to the predominant 2,3-αRαR enantiomer (3D illustration).

Occurrence

The motif (in its predominant 2,3-αRαR conformation) is a common feature of the C- and N-termini of α-helices.