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--- glossary:beta_turn [2008/08/11 09:27] – cuff
+++ glossary:beta_turn [2008/09/17 11:41] (current) – garner
@@ Line 1: / Line 1: @@
+{{tag>beta}}
+====== Beta Turn =======
+A beta turn occurs where the polypeptide chain makes a sharp reversal by 180 degrees
+within 4 residues. A turn is defined by 4 consecutive residues (i to i+3) if the C-alpha(i)
+to C-alpha(i+3) distance is less than 7 angstroms, and if the central two residues are
+not helical.  There is often a [[glossary:hydrogen_bond | hydrogen bond]] between the CO(i) and NH(i+3). There are several different types of beta turns (see references below).
+===== References ====
+{{pubmed>long:4351002}}
+{{pubmed>long:4358939}}
+{{pubmed>long:2865874}}
+{{pubmed>long:2371257}}
+{{pubmed>long:3184187}}
+{{pubmed>long:7756980}}

CATH