Open AccessNucleotide sequence of cucumber‐mosaic‐virus RNA 2 reveals a translation product significantly homologous to corresponding proteins of other viruses
Author(s) -
REZAIAN M. Ali,
WILLIAMS Rhys H. V.,
GORDON Karl H. J.,
GOULD Allan R.,
SYMONS Robert H.
Publication year - 1984
Publication title -
european journal of biochemistry
Language(s) - English
Resource type - Journals
eISSN - 1432-1033
pISSN - 0014-2956
DOI - 10.1111/j.1432-1033.1984.tb08370.x
Subject(s) - brome mosaic virus , rna , biology , cucumber mosaic virus , tobacco mosaic virus , nucleic acid sequence , open reading frame , nucleotide , virology , complementary dna , homology (biology) , alfalfa mosaic virus , mosaic virus , genetics , virus , microbiology and biotechnology , peptide sequence , amino acid , plant virus , dna , rna dependent rna polymerase , gene , coat protein
The nucleotide sequence of the 3035 residues of RNA 2 ( M r 1.03 × 10 6 ) of the Q strain of cucumber mosaic virus (CMV) was determined by sequencing M13 clones of the RNA 2cDNA and by dideoxy sequencing using primers prepared either from M13 clones or by chemical synthesis. A single long open reading frame starts at the second AUG from the 5′ end of RNA 2 and encodes 839 amino acids ( M r 94333). This frame has flanking regions of 92 nucleotides at the 5′ terminus and 423 nudeotides at the 3′ terminus. Computer analysis of the nucleotide sequence showed that CMV RNA 2 has a significant homology with RNA 2 of brome mosaic virus (BMV) and alfalfa mosaic virus (AMV) and also with a region for tobacco mosaic virus (TMV) RNA encoding the read‐through part of the 183‐kDa protein. About 400 amino acids in the central region of the CMV RNA 2 translation product have a striking homology with the corresponding proteins encoded by BMV and AMV and with the read‐through part of the TMV 183‐kDa protein. Hydrophobicity plots of CMV and BMV RNA translation products also had apparent similarities. It is concluded that CMV is related to BMV, AMV and TMV in order of increasing evolutionary divergence.