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The nucleotide sequence of citrus leaf rugose ilarvirus RNA-2

Department of Plant Pathology and Physiology, Clemson University, Clemson, South Carolina 29634-0377, U.S.A.

The nucleotide sequence of citrus leaf rugose ilarvirus (CiLRV) RNA-2 consists of 2990 nucleotides and contains one open reading frame (ORF) which encodes a deduced translation product of 832 amino acids with a calculated M_r of 95 501 (95K). The 5' terminus of the RNA has a m⁷Gppp cap. Both the nucleotide sequence of CiLRV RNA-2 and its translated polypeptide share homologies with the nucleotide sequence and translated polypeptide, respectively, of RNA-2 of alfalfa mosaic virus (AIMV). The homology occurs in the central region of both the nucleic acid sequence and the polypeptide. Homologies between either CiLRV or AlMV and other Bromoviridae (cucumber mosaic virus - CMV, brome mosaic virus - BMV and cowpea chlorotic mottle virus - CCMV) were far less. Alignment of the 104 amino acid region (polymerase signature) of the 95K protein against 10 other ‘alpha-like’ plant viral polymerase signatures showed that CiLRV and A1MV are more closely related to each other than to CMV, BMV or CCMV. This is the first report of the full-length sequence of RNA-2 of an ilarvirus.

Received 15 February 1994; accepted 11 May 1994.

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				H.-W. Xin, L.-H. Ji, S. W. Scott, R. H. Symons, and S.-W. Ding Ilarviruses Encode a Cucumovirus-Like 2b Gene That Is Absent in Other Genera within the Bromoviridae J. Virol., August 1, 1998; 72(8): 6956 - 6959. [Abstract] [Full Text] [PDF]