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Genes 2016, 7(11), 100; doi:10.3390/genes7110100

A Genome-Wide Identification and Analysis of the Basic Helix-Loop-Helix Transcription Factors in Brown Planthopper, Nilaparvata lugens

State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
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Author to whom correspondence should be addressed.
Academic Editor: J. Peter W. Young
Received: 4 July 2016 / Revised: 11 October 2016 / Accepted: 19 October 2016 / Published: 18 November 2016
(This article belongs to the Section Population and Evolutionary Genetics and Genomics)
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Abstract

The basic helix-loop-helix (bHLH) transcription factors in insects play essential roles in multiple developmental processes including neurogenesis, sterol metabolism, circadian rhythms, organogenesis and formation of olfactory sensory neurons. The identification and function analysis of bHLH family members of the most destructive insect pest of rice, Nilaparvata lugens, may provide novel tools for pest management. Here, a genome-wide survey for bHLH sequences identified 60 bHLH sequences (NlbHLHs) encoded in the draft genome of N. lugens. Phylogenetic analysis of the bHLH domains successfully classified these genes into 40 bHLH families in group A (25), B (14), C (10), D (1), E (8) and F (2). The number of NlbHLHs with introns is higher than many other insect species, and the average intron length is shorter than those of Acyrthosiphon pisum. High number of ortholog families of NlbHLHs was found suggesting functional conversation for these proteins. Compared to other insect species studied, N. lugens has the highest number of bHLH members. Furthermore, gene duplication events of SREBP, Kn(col), Tap, Delilah, Sim, Ato and Crp were found in N. lugens. In addition, a putative full set of NlbHLH genes is defined and compared with another insect species. Thus, our classification of these NlbHLH members provides a platform for further investigations of bHLH protein functions in the regulation of N. lugens, and of insects in general. View Full-Text
Keywords: basic helix-loop-helix; Nilaparvata lugens; phylogenetic analysis; ortholog family basic helix-loop-helix; Nilaparvata lugens; phylogenetic analysis; ortholog family
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MDPI and ACS Style

Wan, P.-J.; Yuan, S.-Y.; Wang, W.-X.; Chen, X.; Lai, F.-X.; Fu, Q. A Genome-Wide Identification and Analysis of the Basic Helix-Loop-Helix Transcription Factors in Brown Planthopper, Nilaparvata lugens. Genes 2016, 7, 100.

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