Human cytomegalovirus RL13 protein interacts with host NUDT14 protein affecting viral DNA replication

Wang,Guili; Ren,Gaowei; Cui,Xin; Lu,Zhitao; Ma,Yanping; Qi,Ying; Huang,Yujing; Liu,Zhongyang; Sun,Zhengrong; Ruan,Qiang

doi:10.3892/mmr.2016.4778

Human cytomegalovirus RL13 protein interacts with host NUDT14 protein affecting viral DNA replication

Authors:
- Guili Wang
- Gaowei Ren
- Xin Cui
- Zhitao Lu
- Yanping Ma
- Ying Qi
- Yujing Huang
- Zhongyang Liu
- Zhengrong Sun
- Qiang Ruan
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Affiliations: Virus Laboratory, The Affiliated Shengjing Hospital, China Medical University, Shenyang, Liaoning 110004, P.R. China
Published online on: January 13, 2016 https://doi.org/10.3892/mmr.2016.4778
Pages: 2167-2174

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Abstract

The interaction between the host and human cytomegalovirus (HCMV) is important in determining the outcome of a viral infection. The HCMV RL13 gene product exerts independent, inhibitory effects on viral growth in fibroblasts and epithelial cells. At present, there are few reports on the interactions between the HCMV RL13 protein and human host proteins. The present study provided direct evidence for the specific interaction between HCMV RL13 and host nucleoside diphosphate linked moiety X (nudix)‑type motif 14 (NUDT14), a UDP‑glucose pyrophosphatase, using two‑hybrid screening, an in vitro glutathione S‑transferase pull‑down assay, and co‑immunoprecipitation in human embryonic kidney HEK293 cells. Additionally, the RL13 protein was shown to co‑localize with the NUDT14 protein in the HEK293 cell membrane and cytoplasm, demonstrated using fluorescence confocal microscopy. Decreasing the expression level of NUDT14 via NUDT14‑specific small interfering RNAs increased the number of viral DNA copies in the HCMV‑infected cells. However, the overexpression of NUDT14 in a stably expressing cell line did not affect viral DNA levels significantly in the HCMV infected cells. Based on the known functions of NUDT14, the results of the present study suggested that the interaction between the RL13 protein and NUDT14 protein may be involved in HCMV DNA replication, and that NUDT14 may offer potential in the modulation of viral infection.

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