Genome-wide identification of target genes for transcription factor BR-C in the silkworm,Bombyx mori  

作　　者：Meng-Pei Guo Wen-Liang Qian Xue-Chuan He Jian Peng Peng Wang Wei-Na Wang Qing-You Xia Dao-Jun Cheng 

机构地区：[1]State Key Laboratory of Silkworm Genome Biology,Biological Science Research Center,Southwest University,Chongqing,400715,China [2]Chongqing Key Laboratory of Sericultural Science,Southwest University,Chongqing,400715,China

出　　处：《Insect Science》2021年第6期1530-1540,共11页昆虫科学（英文版）

基　　金：funded by grants from the National Natural Science Foundation of China(31572464,31772679,and 32070496);the Natural Science Foundation of Chongqing(cstc2019jcyj-msxmX0446);the Fundamental Research Funds for the Central Universities(XDJK2020C008).

摘　　要：Transcription factor Broad Complex(BR-C)is an ecdysone primary response gene in insects and participates in the regulation of insect growth and development.In this study,we performed a genome-wide identification of BR-C target genes in silkworm(Bombyx mori)using chromatin immunoprecipitation followed by high-throughput sequencing(ChIP-seq).As a result,a total of 1006 BR-C ChIP peaks were identified,and 15%of peaks were located in the promoter regions of 133 protein-coding genes.Functional annotation revealed that these ChIP peak-associated genes,as potential BR-C targets,were enriched in pathways related to biosynthetic process,metabolic process,and development.Transcriptome analysis and quantitative real-time polymerase chain reaction(PCR)examination revealed that developmental changes in expression patterns of a portion of potential BR-C targets,including HR96 and GC-otl,were similar to those of BR-C.ChIP-PCR examination confirmed that BR-C could directly bind to the promoters of potential targets.Further,dual luciferase assays demonstrated that HR96 promoter activity was significantly upregulated following BR-C overexpression,and this upregu-lation was abolished when the binding motif in the promoter was truncated.This study will be helpful for deciphering the regulatory roles of BR-C during insect growth and development.

关 键 词：BR-C CHIP-SEQ direct binding SILKWORM target genes transcriptional regulation 

分 类 号：Q963[生物学—昆虫学]