Beta-Helix structure and ice-binding properties of a hyperactive antifreeze protein from an insect.

Presents a study which reports the solution structure of the spruce budworm (Choristoneura fumiferana) antifreeze protein and characterizes its ice-binding properties. Beta-helix structure of the protein; Comparison to the three known fish antifreeze protein structures; Support for the model by ice crystal morphology and ice-etching experiments; Implications for an explanation of the greater activity of the spruce budworm antifreeze.