Journal of Tropical Oceanography ›› 2020, Vol. 39 ›› Issue (1): 66-73.doi: 10.11978/2019021CSTR: 32234.14.2019021

• Marine Biology • Previous Articles     Next Articles

Dynamic characteristics of microtubule-dependent transport of Singapore Grouper Iridovirus in host cells

WANG Liqun1,2, WANG Shaowen3, WANG Hongda4, QIN Qiwei3()   

  1. 1. Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. College of Marine Sciences, South China Agricultural University, Guangzhou 510642
    4. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2019-03-03 Revised:2019-04-22 Online:2020-01-20 Published:2020-01-09
  • Contact: Qiwei QIN E-mail:qinqw@scau.edu.cn
  • Supported by:
    National Natural Science Foundation of China(41606183);Natural Science Foundation of Guangdong Province, China(2016A030310111);National Key R&D Program of China(2017YFA0505300);National Natural Science Foundation of China(21727816);National Natural Science Foundation of China(21721003);National Natural Science Foundation of China(21525314)

Abstract:

Viruses are tiny intracellular parasites and rely on the cellular machinery for replication. Usually, internalized viruses hijack the microtubule for effectively moving from cell membrane to specific compartments for replication. However, the elaborate process of microtubule-dependent transport of viruses in live cells remains unclear. Singapore grouper iridovirus (SGIV) belongs to genus Ranavirus, family Iridoviridae, which is an important viral pathogens marine fish, and causes serious economic losses. In this study, different microtubule-dependent behaviors of SGIV were analyzed by the single-particle tracking technique. We found that some SGIV particles showed bi-directional and active motions from cell periphery to the microtubule organizing center (MTOC), with the highest speed reaching 0.2μm·s-1. When reaching the microtubule intersection, SGIV particles slowed down. Then, some virus was confined near the intersection, with an average speed of 0.008 μm·s-1. Other virus moved forward through the intersection, with a high speed of 0.2μm·s-1 again. In addition, SGIV infection could affect the morphology. The microtubule gradually formed a circular structure around the nucleus and viral factory during SGIV infection. These preliminary results reveal the complex interaction between SGIV and microtubule, further our understanding of intracellular activity of iridoviruses, and contribute to our understanding of the pathogenesis of iridoviruses infection.

Key words: Singapore grouper iridovirus (SGIV), single-particle tracking technology, microtubule, virus transport

CLC Number: 

  • P735