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Journal of Virology, August 2000, p. 7656-7665, Vol. 74, No. 16
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Complete DNA Sequence of the Rat Cytomegalovirus Genome

Cornelis Vink,* Erik Beuken, and Cathrien A. Bruggeman

Department of Medical Microbiology, Cardiovascular Research Institute Maastricht, University of Maastricht, 6202 AZ Maastricht, The Netherlands

Received 18 February 2000/Accepted 16 May 2000

We have determined the complete genome sequence of the Maastricht strain of rat cytomegalovirus (RCMV). The RCMV genome has a length of 229,896 bp and is arranged as a single unique sequence flanked by 504-bp terminal direct repeats. RCMV was found to have counterparts of all but one of the open reading frames (ORFs) that are conserved between murine CMV (MCMV) and human CMV (HCMV). Like HCMV, RCMV lacks homologs of the genes belonging to the MCMV m02 glycoprotein gene family. However, RCMV contains 15 ORFs with homology to members of the MCMV m145 glycoprotein gene family. Four ORFs are predicted to encode homologs of host proteins; R33 and R78 both putatively encode G protein-coupled receptors, whereas r144 and r131 encode homologs of major histocompatibility class I heavy chains and CC chemokines, respectively. An intriguing feature of the RCMV genome is the presence of an ORF, r127, with similarity to the rep gene of parvoviruses as well as ORF U94 of human herpesvirus 6A (HHV-6A) and HHV-6B. Counterparts of these ORFs have not been found in the other sequenced herpesviruses.

* Corresponding author. Mailing address: Department of Medical Microbiology, University of Maastricht, P.O. Box 5800, 6202 AZ Maastricht, The Netherlands. Phone: 31 43 3876669. Fax: 31 43 3876643. E-mail: kvi{at}lmib.azm.nl.

Journal of Virology, August 2000, p. 7656-7665, Vol. 74, No. 16
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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