1l0s: Difference between revisions

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{{STRUCTURE_1l0s|  PDB=1l0s  |  SCENE=  }}  
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'''Choristoneura fumiferana (spruce budworm) antifreeze protein isoform 337'''
===Choristoneura fumiferana (spruce budworm) antifreeze protein isoform 337===




==Overview==
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Reported here is the 2.3 A resolution crystal structure of spruce budworm (Choristoneura fumiferana) antifreeze protein (CfAFP), solved by single anomalous scattering. The structure reveals an extremely regular left-handed beta-helical platform consisting of 15-amino acid loops with a repetitive Thr-X-Thr motif displayed on one of the helix's three faces. This motif results in a two-dimensional array of threonine residues in an identical orientation to those in the nonhomologous, right-handed beta-helical beetle AFP from Tenebrio molitor (TmAFP). The CfAFP structure led us to reevaluate our ice binding model, and the analysis of three possible modes of docking gives rise to a binding mechanism based on surface complementarity. This general mechanism is applicable to both fish and insect AFPs.
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==About this Structure==
==About this Structure==
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[[Category: Iodination]]
[[Category: Iodination]]
[[Category: Left-handed beta-helix]]
[[Category: Left-handed beta-helix]]
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