Thermal hysteresis protein YL-1

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The beta sheet roll motif lines up the amino acid chain such that each turn interacts with a unit cell of the water ice crystal
The beta sheet roll motif lines up the amino acid chain such that each turn interacts with a unit cell of the water ice crystal


Tenebrio molitor (Yellow mealworm beetle)

Contributes to protect body fluid from freezing at subzero temperatures. Lowers the freezing point of the hemolymph by about 2.5 degrees at a concentration of 1 mg/ml. Binds to nascent ice crystals and prevents further growth

Structural highlights

References

Liou YC, Tocilj A, Davies PL, Jia Z. Mimicry of ice structure by surface hydroxyls and water of a beta-helix antifreeze protein. Nature. 2000 Jul 20;406(6793):322-4. doi: 10.1038/35018604. PMID: 10917536.

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Justin Paluba

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