Abstract
The DNA sequence of 9991 nt, corresponding to 18–51 map units of mouse adenovirus type 1 (MAV-1), was determined, completing the sequence of the Larsen strain of MAV-1. The length of the complete MAV-1 genome is 30 946 nucleotides, consistent with previous experimental estimates. The 18–51 map unit region encodes early region 2B proteins necessary for adenoviral replication as well as late region L1 and L2 structural and packaging proteins. Sequence comparison in this region with human adenoviruses indicates broad similarities, including colinear preservation of all recognized open reading frames (ORFs), with highest amino acid identity occurring in the DNA polymerase and polypeptide III (penton base subunit) ORFs. Virus-assciated (VA) RNA is not encoded in the region where VA RNAs are found in the human adenoviruses, between E2B and L1, nor is it encoded anywhere in the entire MAV-1 genome. The MAV-1 polypeptide III lacks the arginin-glycine-aspartic acid (RGD) motif which is involved in an association with cell-surface integrins. Only one RGD sequence is found in an identified coding region in the entire MAV-1 genome. Similar to the porcine adenovirus, this RGD sequence is found in the C-terminus of the MAV-1 fiber protein.
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