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Characterization and Expression of Genes Encoding Three Small Heat Shock Proteins in Sesamia inferens (Lepidoptera: Noctuidae)

1
School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China
2
Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan 250100, China
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Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2014, 15(12), 23196-23211; https://doi.org/10.3390/ijms151223196
Received: 13 October 2014 / Revised: 23 November 2014 / Accepted: 4 December 2014 / Published: 12 December 2014
(This article belongs to the Section Biochemistry)
The pink stem borer, Sesamia inferens (Walker), is a major pest of rice and is endemic in China and other parts of Asia. Small heat shock proteins (sHSPs) encompass a diverse, widespread class of stress proteins that have not been characterized in S. inferens. In the present study, we isolated and characterized three S. inferens genes that encode members of the α-crystallin/sHSP family, namely, Sihsp21.4, Sihsp20.6, and Sihsp19.6. The three cDNAs encoded proteins of 187, 183 and 174 amino acids with calculated molecular weights of 21.4, 20.6 and 19.6 kDa, respectively. The deduced amino acid sequences of the three genes showed strong similarity to sHSPs identified in other lepidopteran insects. Sihsp21.4 contained an intron, but Sihsp20.6 and Sihsp19.6 lacked introns. Real-time quantitative PCR analyses revealed that Sihsp21.4 was most strongly expressed in S. inferens heads; Whereas expression of Sihsp20.6 and Sihsp19.6 was highest in eggs. The three S. inferens sHSP genes were up-regulated during low temperature stress. In summary, our results show that S. inferens sHSP genes have distinct regulatory roles in the physiology of S. inferens. View Full-Text
Keywords: Sesamia inferens; small heat shock protein; cloning; expression pattern Sesamia inferens; small heat shock protein; cloning; expression pattern
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Sun, M.; Lu, M.-X.; Tang, X.-T.; Du, Y.-Z. Characterization and Expression of Genes Encoding Three Small Heat Shock Proteins in Sesamia inferens (Lepidoptera: Noctuidae). Int. J. Mol. Sci. 2014, 15, 23196-23211.

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