Structural basis for the binding of a globular antifreeze protein to ice.Jia, Z., DeLuca, C.I., Chao, H., Davies, P.L.
(1996) Nature 384: 285-288
- PubMed: 8918883
- DOI: 10.1038/384285a0
- Primary Citation of Related Structures:
- PubMed Abstract:
- Multiple Genes Provide the Basis for Antifreeze Protein Diversity and Dosage in the Ocean Pout, Macrozoarces Americanus
Hew, C.L.,Wang, N.C.,Joshi, S.,Fletcher, G.L.,Scott, G.K.,Hayes, P.H.,Buettner, B.,Davies, P.L.
(1988) J.Biol.Chem. 263: 12049
- Erratum. Structural Basis for the Binding of a Globular Antifreeze Protein to Ice
Jia, Z.,Deluca, C.I.,Chao, H.,Davies, P.L.
(1997) Nature 385: 555
- Crystallization and Preliminary X-Ray Crystallographic Studies on Type III Antifreeze Protein
Jia, Z.,Deluca, C.I.,Davies, P.L.
(1995) Protein Sci. 4: 1236
- Use of Proline Mutants to Help Solve the NMR Solution Structure of Type III Antifreeze Protein
Chao, H.,Davies, P.L.,Sykes, B.D.,Sonnichsen, F.D.
(1993) Protein Sci. 2: 1411
Antifreeze proteins (AFPs) have the unique ability to adsorb to ice and inhibit its growth. Many organisms ranging from fish to bacteria use AFPs to retard freezing or lessen the damage incurred upon freezing and thawing. The ice-binding mechanism of ...
Antifreeze proteins (AFPs) have the unique ability to adsorb to ice and inhibit its growth. Many organisms ranging from fish to bacteria use AFPs to retard freezing or lessen the damage incurred upon freezing and thawing. The ice-binding mechanism of the long linear alpha-helical type I AFPs has been attributed to their regularly spaced polar residues matching the ice lattice along a pyramidal plane. In contrast, it is not known how globular antifreeze proteins such as type III AFP that lack repeating ice-binding residues bind to ice. Here we report the 1.25 A crystal structure of recombinant type III AFP (QAE isoform) from eel pout (Macrozoarces americanus), which reveals a remarkably flat amphipathic ice-binding site where five hydrogen-bonding atoms match two ranks of oxygens on the  ice prism plane in the <0001> direction, giving high ice-binding affinity and specificity. This binding site, substantiated by the structures and properties of several ice-binding site mutants, suggests that the AFP occupies a niche in the ice surface in which it covers the basal plane while binding to the prism face.
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