3 Biotech

, 9:433 | Cite as

A transmembrane domain of Andrias davidianus ranavirus 13R is crucial for co-localization to endoplasmic reticulum and viromatrix

  • Nai-Tong YuEmail author
  • Qi-Ya ZhangEmail author
Original Article


13R, a core gene of Andrias davidianus ranavirus (ADRV), encoded a protein containing a transmembrane domain (TMD) and a restriction endonuclease-like domain. However, the characterization and function of 13R and the protein it encodes remain unclear. In this study, Chinese giant salamander thymus cell (GSTC) was used to investigate the function of 13R. The results showed that the 13R transcripts were detected first at 8 h post-infection (hpi) by RT-PCR and the protein was detected first at 24 hpi by western blot, but the transcription was inhibited by cycloheximide and cytosine arabinofuranoside, indicating that 13R is a viral late gene. Subcellular localization showed that the 13R was co-localized with endoplasmic reticulum (ER) in the cytoplasm, while 13R deleting TMD (13RΔTM) was distributed in cytoplasm and nucleus. During ADRV infection, 13R was observed first in the cytoplasm and nucleus, and later aggregated into the viromatrix, whereas 13RΔTM remain dispersed in cytoplasm and nucleus. Western blot analysis suggested that 13R was a viral non-structural protein and its overexpression did not affect the viral titer in GSTC. All these indicated that the TMD of 13R is crucial for the co-localization into the ER and the viromatrix.


Ranavirus Andrias davidianus ranavirus Core gene Transmembrane domain Localization 



This work was supported by the Natural Science Foundation of China (31430091).

Compliance with ethical standards

Conflict of interest

The authors declare that there is no conflict of financial or research interest.


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Copyright information

© King Abdulaziz City for Science and Technology 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of HydrobiologyChinese Academy of SciencesWuhanChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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