6533b836fe1ef96bd12a1c43
RESEARCH PRODUCT
Insect Immunity
René LanotDaniel ZacharyPhilippe BuletJules A. HoffmannChristian BordereauMireille LambertyAlain Robertsubject
chemistry.chemical_classificationbiologymedia_common.quotation_subjectfungiAntimicrobial peptidesPeptideCell BiologyInsectbiology.organism_classificationBiochemistryAmino acidchemistryBiochemistryHemolymphMolecular BiologyPeptide sequenceBacteriaCysteinemedia_commondescription
Two novel antimicrobial peptides, which we propose to name termicin and spinigerin, have been isolated from the fungus-growing termite Pseudacanthotermes spiniger (heterometabole insect, Isoptera). Termicin is a 36-amino acid residue antifungal peptide, with six cysteines arranged in a disulfide array similar to that of insect defensins. In contrast to most insect defensins, termicin is C-terminally amidated. Spinigerin consists of 25 amino acids and is devoid of cysteines. It is active against bacteria and fungi. Termicin and spinigerin show no obvious sequence similarities with other peptides. Termicin is constitutively present in hemocyte granules and in salivary glands. The presence of termicin and spinigerin in unchallenged termites contrasts with observations in evolutionary recent insects or insects undergoing complete metamorphosis, in which antimicrobial peptides are induced in the fat body and released into the hemolymph after septic injury.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-02-01 | Journal of Biological Chemistry |