Virologica Sinica

, Volume 31, Issue 5, pp 425–436 | Cite as

De novo transcriptome analysis of Spodoptera exigua multiple nucleopolyhedrovirus (SeMNPV) genes in latently infected Se301 cells

Research Article

Abstract

Cells of the P8-Se301-C1 strain are Spodoptera exigua cell clones that each harbor a partial version of the S. exigua multiple nucleopolyhedrovirus (SeMNPV) genome and which are resistant to homologous SeMNPV infections. The cells produce no viral progeny, suggesting that the infection is a latent-like viral infection. To investigate the SeMNPV genes harbored in the P8-Se301-C1 cells, the de novo transcriptomes of P8-Se301-C1 cells and S. exigua Se301 cells were analyzed and compared. A total of 54,569,296 reads were obtained from the P8-Se301-C1 cells that yielded 112,565 final unigenes with a mean length of 1,093 nt. A total of 56,865,504 reads were obtained from the Se301 cells that yielded 102,996 final unigenes with a mean length of 1,082 nt. Ten SeMNPV gene transcripts (se5, se7, se8, se12, se43, se45, se89, se90, se124, and se126) were detected in the P8-Se301-C1 cells by RNA-Seq but not in the Se301 cells, which was verified by RTPCR. 5′/3′ RACE analyses showed that the 3′- or 5′-end sequences of the viral transcripts are aligned to the host gene sequences in P8-Se301-C1 cells, suggesting that the SeMNPV genes may integrate into and be transcribed with the host genes in the P8-Se301-C1 cells. Furthermore, six additional viral gene transcripts, se11, se42, se44, se88, se91, and se127 (incorporated into chimeric fusion transcripts in the P8-Se301-C1 cells), were detected in the RACE analyses. Taken together, sixteen SeMNPV transcripts were identified in the P8-Se301-C1 cell strain. This study provides information to develop the understanding of baculovirus latent infections and superinfection exclusion.

Keywords

RNA-Seq SeMNPV baculovirus latent infection Spodoptera exigua 

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De novo transcriptome analysis of Spodoptera exigua multiple nucleopolyhedrovirus (SeMNPV) genes in latently infected Se301 cells

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Copyright information

© Wuhan Institute of Virology, CAS and Springer Science+Business Media Singapore 2016

Authors and Affiliations

  1. 1.School of Life SciencesGuizhou Normal UniversityGuiyangChina

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