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Domain-swapped structure of the potent antiviral protein griffithsin and its mode of carbohydrate binding

  1. Author:
    Ziolkowska, N. E.
    O'Keefe, B. R.
    Mori, T.
    Zhu, C.
    Giomarelli, B.
    Vojdani, F.
    Palmer, K. E.
    McMahon, J. B.
    Wlodawer, A.

  2. Author Address

    NCI, Frederick Canc Res & Dev Ctr, Prot Struct Sect, Macromol Crystallog Lab, Frederick, MD 21702 USA. NCI, Frederick Canc Res & Dev Ctr, Mol Targets Dev Program, Ctr Canc Res, Frederick, MD 21702 USA. NCI, Frederick Canc Res & Dev Ctr, Werner H Kirsten Student Internship Program, Frederick, MD 21702 USA. Large Scale Biol Corp, Vacaville, CA 95688 USA.;Wlodawer, A, NCI, Frederick Canc Res & Dev Ctr, Prot Struct Sect, Macromol Crystallog Lab, Frederick, MD 21702 USA.;wlodawer@ncifcrf.gov
    1. Year: 2006
    2. Date: Jul
  2. Journal: Structure
    1. 14
    2. 7
    3. Pages: 1127-1135
  4. Type of Article: Article
  5. ISSN: 0969-2126
  1. Abstract:

    The crystal structure of griffithsin, an antiviral lectin from the red alga Griffithsia sp., was solved and refined at 1.3 angstrom resolution for the free protein and 0.94 A for a complex with mannose. Griffithsin molecules form a domain-swapped dimer, in which two beta strands of one molecule complete a beta prism consisting of three four-stranded sheets, with an approximate 3-fold axis, of another molecule. The structure of each monomer bears close resemblance to jacalin-related lectins, but its dimeric structure is unique. The structures of complexes of griffithsin with mannose and N-acetylglucosamine defined the locations of three almost identical carbohydrate binding sites on each monomer. We have also shown that griffithsin is a potent inhibitor of the coronavirus responsible for severe acute respiratory syndrome (SARS). Antiviral potency of griffithsin is likely due to the presence of multiple, similar sugar binding sites that provide redundant attachment points for complex carbohydrate molecules present on viral envelopes.

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External Sources

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  2. DOI: 10.1016/j.str.2006.05.017
  3. View record in Web of Science®
  4. WOS: 000239228500007

Library Notes

  1. Student Author
NCI at Frederick

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