Download MendeleyCaenopore-5: the three-dimensional structure of an antimicrobial protein from Caenorhabditis elegans.
Mysliwy, J., Dingley, A.J., Stanisak, M., Jung, S., Lorenzen, I., Roeder, T., Leippe, M., Grotzinger, J.(2010) Dev Comp Immunol 34: 323-330
- PubMed: 19917307
- DOI: https://doi.org/10.1016/j.dci.2009.11.003
- Primary Citation of Related Structures:
2JS9, 2JSA - PubMed Abstract:
The caenopore-5 protein encoded by the spp-5 gene is one of the 33 caenopores identified in Caenorhabditis elegans and is a pore-forming peptide which plays an important role in the elimination of Escherichia coli ingested by the worm. Thus, caenopore-5 appears to contribute to the nutrition of the worm while simultaneously protecting the organism against pathogens. Here, three-dimensional heteronuclear NMR spectroscopy was used to solve the solution structure of caenopore-5. The NMR data revealed that two conformers of caenopore-5 exist in solution which differ by the isomerization of the peptide bond of Pro-81. The overall structure of the two caenopore-5 conformers consists of five amphiphatic helices connected by three disulfide bonds. The five helices are arranged in a folded leaf which is the characteristic signature of the SAPLIP family. The structure presented here is the first of an effector protein of the defensive system elucidated for the well-known model organism C. elegans.
Organizational Affiliation:
Institute of Biochemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, 24098 Kiel, Germany.
