Coat protein amino acid sequence less than 80% identical,
Polymerase amino acid sequence less than 80% identical,
No pseudo-recombination between components possible,
Differences in antigenic reactions.
|
Type Species |
(CPMV) |
Capsids are constructed from two polypeptide species (Large and Small). RNA-2 is typically translated into two carboxy coterminal polyproteins, that are cleaved into the two CPs, the MP and a protein (P2AB) that is possibly involved in replication of RNA-2 (Fig. 3). Comoviruses have narrow host ranges, 11 of the 15 species being restricted to a few species of the family Leguminosae. Mosaic and mottle symptoms are characteristic, but usually not ringspots. Transmission in nature is exclusively by beetles, especially members of the family Chrysomelidae. Beetles retain their ability to transmit virus for days or weeks.
List of Species Demarcation Criteria in the Genus
The criteria demarcating species in the genus are:
|
Coat protein amino acid sequence less than 80% identical, |
|
Polymerase amino acid sequence less than 80% identical, |
|
No pseudo-recombination between components possible, |
|
Differences in antigenic reactions. |
Using polyclonal rabbit antisera in agar gel diffusion tests CPMV and Cowpea severe mosaic virus (CPSMV) differ by four two-fold steps. Their CPs have less than 54% identity and 61% homology between the aligned respective nucleic and amino acid sequences. Their Pol proteins have less than 55% identity and 62% homology between the aligned respective nucleic and amino acid sequences. No component reassortment has been demonstrated between these viruses.
Official virus species names are in italics. Tentative virus species names, alternative names ( ), strains or serotypes are not italicized. Virus names, CMI/AAB description numbers ( ), genome sequence accession numbers [ ], and assigned abbreviations ( ) are:
|
Andean potato mottle virus (203) |
[L19239] |
(APMoV) |
|
Bean pod mottle virus (108) |
[M62738] |
(BPMV) |
|
Bean rugose mosaic virus (246) |
(BRMV) | |
|
Broad bean stain virus (126) |
(BBSV) | |
|
Broad bean true mosaic virus (20) |
(BBTMV) | |
|
Cowpea mosaic virus (47, 197) |
[X00206, X00729] |
(CPMV) |
|
Cowpea severe mosaic virus (209) |
[M83830, M83309] |
(CPSMV) |
|
Glycine mosaic virus |
(GMV) | |
|
Pea green mottle virus |
(PGMV) | |
|
Pea mild mosaic virus |
(PMiMV) | |
|
Quail pea mosaic virus (238) |
(QPMV) | |
|
Radish mosaic virus (121) |
(RaMV) | |
|
Red clover mottle virus (74) |
[M14193, X64886] |
(RCMV) |
|
Squash mosaic virus (43) |
[AF059532] |
(SqMV) |
|
Ullucus virus C (277) |
(UVC) |
Tentative Species in the Genus
None reported.
|
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