Cloning and Expression Profiling of Odorant Binding Protein Gene in Carpomya vesuviana (Costa) (Diptera: Tephritidae)

Objective This study aims to clone Carpomya vesuviana Costa odorant binding protein(CvcoOBP)and analyze expression profile of CvcoOBP in order to lay the foundation of researching CvcoOBP in Carpomya vesuviana Costa.MethodBased on transcriptome sequencing of cephalic RNA,the study has analyzed CvcoOBP according to alignment and phylogenetic analysis.The research was also conducted into the tissue specific expression of CvcoOBP by semi-quantitative reverse transcription and polymerase chain reaction(sqRT-PCR).ResultThe study has obtained seven CvcoOBP that had been named respectively as CvcoOBP1-7(GenBank accession number: KU975053,KU975054,KU975055,KX059394,KU975056,KX059395 and KX059396).According to amino acid alignment,CvcoOBP1,CvcoOBP3,CvcoOBP4,CvcoOBP6 and CvcoOBP7 had been proved to be a family of classic OBP,which contained six highly conversed cysteine residues.CvcoOBP2 and CvcoOBP5 belonged to a family of "Minus-C",which had only four highly conversed cysteine residues.Phylogenetic analysis showed that CvcoOBP1-7 had close relationships with different OBPs.Finally,sqRT-PCR revealed that CvcoOBP1-7 could be highly expressed in abdomen,head and thorax.CvcoOBP1 and CvcoOBP2 could be also expressed in wings with relatively low expression.CvcoOBP1,CvcoOBP5 and CvcoOBP6 were also found in legs.ConclusionFor the first time,the study obtained and analyzed seven CvcoOBP.Different CvcoOBP are various in terms of expression sites and expression quantity.The CvcoOBP1-6 separately belongs to OBP56g,OBP8a,OBP83a,OBP56h,OBP99c and OBP83ef type.