A Kazal-type serine protease inhibitor from the defense gland secretion of the subterranean termite Coptotermes formosanus Shiraki

Horia Negulescu, Youzhong Guo, Thomas P. Garner, Octavia Y. Goodwin, Gregg Henderson, Roger A. Laine, Megan A. Macnaughtan

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Coptotermes formosanus is an imported, subterranean termite species with the largest economic impact in the United States. The frontal glands of the soldier caste termites comprising one third of the body mass, contain a secretion expelled through a foramen in defense. The small molecule composition of the frontal gland secretion is well-characterized, but the proteins remain to be identified. Herein is reported the structure and function of one of several proteins found in the termite defense gland secretion. TFP4 is a 6.9 kDa, non-classical group 1 Kazal-type serine protease inhibitor with activity towards chymotrypsin and elastase, but not trypsin. The 3-dimensional solution structure of TFP4 was solved with nuclear magnetic resonance spectroscopy, and represents the first structure from the taxonomic family, Rhinotermitidae. Based on the structure of TFP4, the protease inhibitor active loop (Cys8 to Cys16) was identified.

Original languageEnglish (US)
Article number0125376
JournalPloS one
Volume10
Issue number5
DOIs
StatePublished - May 15 2015

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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    Negulescu, H., Guo, Y., Garner, T. P., Goodwin, O. Y., Henderson, G., Laine, R. A., & Macnaughtan, M. A. (2015). A Kazal-type serine protease inhibitor from the defense gland secretion of the subterranean termite Coptotermes formosanus Shiraki. PloS one, 10(5), [0125376]. https://doi.org/10.1371/journal.pone.0125376