id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-004719-3stcx0dd	Mushegian, A. R.	Cell-to-cell movement of plant viruses: Insights from amino acid sequence comparisons of movement proteins and from analogies with cellular transport systems	1993		.txt	text/plain	6347	280	44	In several groups of positive-strand RNA viruses, the movement function is provided by the proteins encoded by the so-called triple gene block including two putative small membrane-associated proteins and a putative RNA helicase. It is concluded that classification of movement proteins based on comparison of their amino acid sequences does not correlate with the type of genome nucleic acid or with grouping of viruses based on phylogenetic analysis of replicative proteins or with the virus host range. Limited sequence similarities were observed between i) movement proteins of dianthoviruses and the MIP family of cellular integral membrane proteins, and ii) between movement proteins of bromoviruses and cucumoviruses and M1 protein of influenza viruses which is involved in nuclear export of viral ribonucleoproteins. With representative sequences of plant virus genomes from many groups available, efforts were made to identify regions of similarity between known movement proteins and to predict movement functions for uncharacterized ORFs. Early observations made by this approach have been reviewed previously (e.g.	./cache/cord-004719-3stcx0dd.txt	./txt/cord-004719-3stcx0dd.txt