title: Rolling circle amplification-mediated hairpin RNA (RMHR) library construction in plants.
abstract: Long hairpin RNA (lhRNA) construct-induced gene silencing facilitates the study of gene function in plants and animals, but constructing multiple lhRNA vectors using traditional approaches is both time-consuming and costly. Also, most of the existing approaches are based on sequence-specific cloning of individual sequences, and are therefore not suitable for preparing hpRNA libraries from a pool of mixed target sequences. Here we describe a rolling-circle amplification (RCA)-mediated hpRNA (RMHR) construction system suitable for generating libraries of lhRNA constructs from any gene of interest or pool of genes. Using RMHR we successfully generated a lhRNA library from a Arabidopsis cDNA population containing known and unknown genes, with an average size of 500-800 bp for the inverted-repeat inserts. To validate the RMHR system, lhRNA constructs targeting the beta-glucuronidase (GUS) gene were tested using Agrobacterium infiltration and shown to be effective at inducing GUS silencing in tobacco leaves. Our results indicate that the RMHR technique permits rapid, efficient and low-cost preparation of genome-wide lhRNA expression libraries.
authors.affiliation: The National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, Biotechnology Research Institute, Beijing, China. wanglei@caas.net.cn
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Yan-Zhong
authors.initials: YZ
authors.lastname: Luo
authors.forename: Lan
authors.initials: L
authors.lastname: Zhang
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Jiao
authors.forename: Ming-Bo
authors.initials: MB
authors.lastname: Wang
authors.forename: Yun-Liu
authors.initials: YL
authors.lastname: Fan
mesh_terms: D017360:Arabidopsis / Q000235:genetics*; D004270:DNA, Circular / Q000096:biosynthesis; D004259:DNA-Directed DNA Polymerase / Q000378:metabolism; D015723:Gene Library; D005966:Glucuronidase / Q000235:genetics; D034622:RNA Interference; D022661:RNA, Untranslated / Q000096:biosynthesis* / Q000235:genetics
chemical_list: D004270:DNA, Circular; D022661:RNA, Untranslated; D004259:DNA-Directed DNA Polymerase; D005966:Glucuronidase