Molecular cloning and characterization of a class II ADP ribosylation factor from the shrimp Marsupenaeus japonicus.
In shrimp, small GTPases in the Ras superfamily can regulate hemolytic phagocytosis against WSSV infection. However, the ADP ribosylation factors (Arfs), also belonging to the regulatory GTP-binding proteins and playing a central role in membrane trafficking, have not been reported yet in shrimp and their relationship with WSSV infection is completely unknown to date. Here, a novel class II Arf (designated as MjArf4) was cloned and characterized from the shrimp Marsupenaeus japonicus. Like other Arfs, MjArf4 contains an N-terminal myristoylated site, a p loop, switch regions, as well as an interswitch region. In High Five cells, when MjArf4 was in its GDP-bound form, it dispersed into the whole cell, whereas in the GTP-bound form it promoted formation of a punctuate Golgi-like structure, indicating that the MjArf4 distribution was dependent on its GDP/GTP binding. After challenge with WSSV, the mRNA level of MjArf4 was up-regulated significantly as WSSV propagated. Thus, a member of the Arf family was characterized for the first time in shrimp and found to be involved in WSSV infection.
Zhang
Mingchang
M
School of Life Sciences, Xiamen University, Xiamen 361005, PR China.
Ma
Jinyou
J
Lei
Kaiyu
K
Xu
Xun
X
D020727:ADP-Ribosylation Factors / Q000096:biosynthesis / Q000235:genetics* / Q000502:physiology; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004266:DNA Virus Infections / Q000276:immunology; D008969:Molecular Sequence Data; D033561:Penaeidae / Q000201:enzymology / Q000235:genetics / Q000276:immunology* / Q000821:virology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D046848:White spot syndrome virus 1 / Q000276:immunology
D020727:ADP-Ribosylation Factors