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Antifreeze protein NMR sensor to detect water molecular reorientation in the surface of ice

J. Chem. Phys. 131, 101102 (2009); doi:10.1063/1.3223181

Published 10 September 2009

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Yougang Mao, Wei Lin, and Yong Ba
Department of Chemistry and Biochemistry, California State University–Los Angeles, Los Angeles, California 90032, USA
The century-old puzzle of the existence of a quasiliquid layer in the surface of ice was revisited using ice-surface binding type I antifreeze proteins with specific side chain 13C labeled methyl groups. Variable temperature dependent 13C spin lattice relaxation NMR experiments were carried out below 0 °C to probe the water molecular reorientations surrounding the methyl groups. The result shows that water molecular reorientations in ice surface are much more dynamic than those in bulk ice. This study demonstrates that antifreeze proteins can be used as a sensor to detect the dynamics of water in the surface of ice. ©2009 American Institute of Physics
History: Received 28 May 2009; accepted 16 August 2009; published 10 September 2009
Permalink: http://link.aip.org/link/?JCPSA6/131/101102/1
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KEYWORDS and PACS

Keywords
PACS
  • 76.60.Es
    Relaxation effects (condensed matter NMR)
  • 82.80.-d
    Chemical analysis and related physical methods of analysis
  • 68.15.+e
    Liquid thin films
  • 82.56.Na
    Relaxation in NMR (of chemical processes)
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

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