NMR structure of a Kazal-type serine protease inhibitor from the subterranean termite defense gland of Coptotermes formosanus Shiraki soldiers

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.2 of the entry. See complete history


A Kazal-Type Serine Protease Inhibitor from the Defense Gland Secretion of the Subterranean Termite Coptotermes formosanus Shiraki.

Negulescu, H.Guo, Y.Garner, T.P.Goodwin, O.Y.Henderson, G.Laine, R.A.Macnaughtan, M.A.

(2015) PLoS One 10: e0125376-e0125376

  • DOI: https://doi.org/10.1371/journal.pone.0125376
  • Primary Citation of Related Structures:  

  • PubMed 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 (Cys(8) to Cys(16)) was identified.

  • Organizational Affiliation

    Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803, United States of America.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lysozyme-Protease Inhibitor Protein75Coptotermes formosanusMutation(s): 0 
Find proteins for V9GZ93 (Coptotermes formosanus)
Explore V9GZ93 
Go to UniProtKB:  V9GZ93
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupV9GZ93
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-05-06
    Type: Initial release
  • Version 1.1: 2015-05-27
    Changes: Database references
  • Version 1.2: 2023-06-14
    Changes: Data collection, Database references, Other