PMID- 12876458 OWN - NLM STAT- MEDLINE DCOM- 20031107 LR - 20191026 IS - 0920-8569 (Print) IS - 0920-8569 (Linking) VI - 26 IP - 3 DP - 2003 May TI - Complete genomic sequence of the Australian south-west genotype of Sindbis virus: comparisons with other Sindbis strains and identification of a unique deletion in the 3'-untranslated region. PG - 317-27 AB - Our previous studies have shown that two distinct genotypes of Sindbis (SIN) virus occur in Australia. One of these, the Oriental/Australian type, circulates throughout most of the Australian continent, whereas the recently identified south-west (SW) genetic type appears to be restricted to a distinct geographic region located in the temperate south-west of Australia. We have now determined the complete nucleotide and translated amino acid sequences of a SW isolate of SIN virus (SW6562) and performed comparative analyses with other SIN viruses at the genomic level. The genome of SW6562 is 11,569 nucleotides in length, excluding the cap nucleotide and poly (A) tail. Overall this virus differs from the prototype SIN virus (strain AR339) by 23% in nucleotide sequence and 12.5% in amino acid sequence. Partial sequences of four regions of the genome of four SW isolates were determined and compared with the corresponding sequences from a number of SIN isolates from different regions of the World. These regions are the non-structural protein (nsP3), the E2 gene, the capsid gene, and the repeated sequence elements (RSE) of the 3'UTR. These comparisons revealed that the SW SIN viruses were more closely related to South African and European strains than to other Australian isolates of SIN virus. Thus the SW genotype of SIN virus may have been introduced into this region of Australia by viremic humans or migratory birds and subsequently evolved independently in the region. The sequence data also revealed that the SW genotype contains a unique deletion in the RSE of the 3'UTR region of the genome. Previous studies have shown that deletions in this region of the SIN genome can have significant effects on virus replication in mosquito and avian cells, which may explain the restricted distribution of this genotype of SIN virus. FAU - Saleh, Suha M AU - Saleh SM AD - Department of Microbiology, School of Molecular and Microbial Sciences, University of Queensland, Brisbane, Australia. FAU - Poidinger, Michael AU - Poidinger M FAU - Mackenzie, John S AU - Mackenzie JS FAU - Broom, Annette K AU - Broom AK FAU - Lindsay, Michael D AU - Lindsay MD FAU - Hall, Roy A AU - Hall RA LA - eng SI - GENBANK/AF061237 SI - GENBANK/AF061238 SI - GENBANK/AF061239 SI - GENBANK/AF429428 SI - GENBANK/AF439978 SI - GENBANK/AF439979 SI - GENBANK/AF439980 SI - GENBANK/AF439981 SI - GENBANK/AF439982 SI - GENBANK/AF439983 SI - GENBANK/AF439984 SI - GENBANK/AF439985 SI - GENBANK/AF439986 SI - GENBANK/AF439987 SI - GENBANK/AF439988 SI - GENBANK/AF439989 SI - GENBANK/AF439990 SI - GENBANK/AF439991 SI - GENBANK/AF450099 SI - GENBANK/AF450104 SI - GENBANK/AF450105 SI - GENBANK/AF450106 SI - GENBANK/AF450107 PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Virus Genes JT - Virus genes JID - 8803967 SB - IM MH - Animals MH - Base Sequence MH - *Genome, Viral MH - Genotype MH - Molecular Sequence Data MH - Sequence Alignment MH - *Sequence Analysis, DNA MH - Sindbis Virus/*classification/*genetics MH - Western Australia EDAT- 2003/07/24 05:00 MHDA- 2003/11/08 05:00 CRDT- 2003/07/24 05:00 PHST- 2003/07/24 05:00 [pubmed] PHST- 2003/11/08 05:00 [medline] PHST- 2003/07/24 05:00 [entrez] AID - 5127078 [pii] AID - 10.1023/a:1024407516352 [doi] PST - ppublish SO - Virus Genes. 2003 May;26(3):317-27. doi: 10.1023/a:1024407516352.