Carvalho C M, Pouwels J, van Lent J W M, Bisseling T, Goldbach R W, Wellink J
Laboratory of Virology, Department of Plant Sciences, Wageningen University, 6709 PD Wageningen, The Netherlands.
J Virol. 2004 Feb;78(3):1591-4. doi: 10.1128/jvi.78.3.1591-1594.2004.
The movement protein (MP) of Cowpea mosaic virus forms tubules in plasmodesmata to enable the transport of mature virions. Here it is shown that the MP is capable of specifically binding riboguanosine triphosphate and that mutational analysis suggests that GTP binding plays a role in the targeted transport of the MP. Furthermore, the MP is capable of binding both single-stranded RNA and single-stranded DNA in a non-sequence-specific manner, and the GTP- and RNA-binding sites do not overlap.
豇豆花叶病毒的运动蛋白(MP)在胞间连丝中形成小管,以促进成熟病毒粒子的运输。本文表明,MP能够特异性结合三磷酸核糖鸟苷,并且突变分析表明,GTP结合在MP的靶向运输中发挥作用。此外,MP能够以非序列特异性方式结合单链RNA和单链DNA,且GTP结合位点与RNA结合位点不重叠。