Serratia marcescens secretes proteases and chitinases with larvicidal activity against Anopheles dirus
Issue Date
12-2020
Abstract
Vector control, the most efficient tool to reduce mosquito-borne disease transmission, has been compromised by the rise of insecticide resistance. Recent studies suggest the potential of mosquito-associated microbiota as a source for new biocontrol agents or new insecticidal chemotypes. In this study, we identified a strain of Serratia marcescens that has larvicidal activity against Anopheles dirus, an important malaria vector in Southeast Asia. This bacterium secretes heat-labile larvicidal macromolecules when cultured under static condition at 25°C but not 37°C. Two major protein bands of approximately 55 kDa and 110 kDa were present in spent medium cultured at 25°C but not at 37°C. The Liquid Chromatography-Mass Spectrometry (LC-MS) analyses of these two protein bands identified several proteases and chitinases that were previously reported for insecticidal properties against agricultural insect pests. The treatment with protease and chitinase inhibitors led to a reduction in larvicidal activity, confirming that these two groups of enzymes are responsible for the macromolecule's toxicity. Taken together, our results suggest a potential use of these enzymes in the development of larvicidal agents against Anopheles mosquitoes.
Source or Periodical Title
Acta Tropica
ISSN
0001-706X
Volume
212
Page
1-12
Document Type
Article
Physical Description
illustration, graphs, table, references
Language
English
Subject
Anopheles, Entomopathogen, Larvicidal, Mass spectrometry, Microbiota
Recommended Citation
Jupatanakul, N., Pengon, J., Selisana, S.M.G., Choksawangkarn, W., Jaito, N., Saeung, A., Bunyong, R., Posayapisit, N., Thammatinna, K., Kalpongnukul, N., Aupalee, K., Pisitkun, T., Kamchonwongpaisan, S. (2020). Serratia marcescens secretes proteases and chitinases with larvicidal activity against Anopheles dirus. Acta Tropica, 212, 1-12. DOI: 10.1101/2020.05.31.123539.
Identifier
DOI:10.1101/2020.05.31.123539
Digital Copy
yes
En – AGROVOC descriptors
ANOPHELES; ENTOMOPATHOGEN; LARVICIDAL; MASS SPECTROMETRY; MICROBIODATA
