Document Detail

Double-stranded RNAs of cucumber mosaic virus and its satellite contain an unpaired terminal guanosine: implications for replication.
MedLine Citation:
PMID:  18640549     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Terminal sequences of the double-stranded (ds) forms of RNAs 3 and 4 and the satellite RNA (CARNA 5) of cucumber mosaic virus (CMV) have been determined. The ds forms of both CARNA 5 and RNA 3 contain an unpaired guanosine (G) at the 3' end of the minus (-) strand, a feature also present in the replicative forms (RFs) of several animal alphaviruses. The unpaired G present in the CMV-related ds RNAs suggests that these molecules represent RFs and that viral and satellite RNAs share common replicative machinery. The 3' terminus of the (-) strand of ds RNA 4 is heterogeneous, with and without the added G. The existence of these two ds RNA 4 molecules suggests that replication of the subgenomic RNA 4 proceeds through a mechanism different from that of the genomic RNAs. The plus (+) strands of the ds forms of RNAs 3 and 4 and CARNA 5 are uncapped at the 5' termini and all end with a 3'-terminal cytosine (C. The 3'-terminal adenosine (A) present on most single-stranded (ss), encapsidated, CMV RNAs 3 and 4 is therefore added post-transcriptionally, and a possible control function for such a 3' terminus is discussed. The lack of an added 3'-terminal A on ss, encapsidated, CARNA 5 could result in its high replicative efficiency through escape from such a control.
C W Collmer; J M Kaper
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Virology     Volume:  145     ISSN:  0042-6822     ISO Abbreviation:  Virology     Publication Date:  1985 Sep 
Date Detail:
Created Date:  2008-07-21     Completed Date:  2008-08-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0110674     Medline TA:  Virology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  249-59     Citation Subset:  -    
Plant Virology Laboratory, Plant Protection Institute, Agricultural Research Service, U. S Department of Agriculture, Beltsville, Maryland 20705, USA.
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