PMID- 10456793 OWN - NLM STAT- MEDLINE DCOM- 19990922 LR - 20220801 IS - 0920-8569 (Print) IS - 0920-8569 (Linking) VI - 18 IP - 3 DP - 1999 TI - Identification of a gene cluster within the genome of Chilo iridescent virus encoding enzymes involved in viral DNA replication and processing. PG - 243-64 AB - The nucleotide sequence of the genome of Chilo iridescent virus (CIV) between the genome coordinates 0.974 and 0.101 comprising 27,079 bp was determined. Computer-assisted analysis of the DNA sequence of this particular region of the CIV genome revealed the presence of 42 potential open reading frames (ORFs) with coding capacities for polypeptides ranging from 50 to 1,273 amino acid residues. The analysis of the amino acid sequences deduced from the individual ORFs resulted in the identification of 10 potential viral genes that show significant homology to functionally characterized proteins of other species. A cluster of five viral genes that encode enzymes involved in the viral DNA replication was identified including the DNA topoisomerase II (A039L,1,132 amino acids (aa)), the DNA polymerase (ORF A031L,1,273 aa), a helicase (ORF A027L, 530 aa), a nucleoside triphosphatase I (ORF A025L, 1,171 aa), and an exonuclease II (ORF A019L, 624aa), all ORFs possessing the same genomic orientation. The DNA polymerase of CIV showed the highest homology (24.8% identity) to the DNA polymerase of lymphocystis disease virus lymphocystis disease virus 1 (LCDV-1), a member of the family Iridoviridae, indicating the close relatedness of the two viruses. In addition, four putative gene products were found to be significantly homologous to previously identified hypothetical proteins of CIV. FAU - Muller, K AU - Muller K AD - Institut fur Medizinische Virologie, Universitat Heidelberg, Federal Republic of Germany. FAU - Tidona, C A AU - Tidona CA FAU - Darai, G AU - Darai G LA - eng SI - GENBANK/AF083915 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Virus Genes JT - Virus genes JID - 8803967 RN - 0 (DNA Primers) RN - 0 (Saccharomyces cerevisiae Proteins) RN - EC 2.7.7.7 (DNA-Directed DNA Polymerase) RN - EC 3.1.- (Exodeoxyribonucleases) RN - EC 3.1.11.- (exodeoxyribonuclease II) RN - EC 3.6.1.- (PIF1 protein, S cerevisiae) RN - EC 3.6.4.- (DNA Helicases) RN - EC 5.99.1.3 (DNA Topoisomerases, Type II) SB - IM MH - Amino Acid Sequence MH - Base Sequence MH - DNA Helicases/genetics MH - DNA Primers MH - DNA Replication/*genetics MH - DNA Topoisomerases, Type II/genetics MH - DNA-Directed DNA Polymerase/genetics MH - Exodeoxyribonucleases/genetics MH - Genome, Viral MH - Iridoviridae/enzymology/*genetics MH - Molecular Sequence Data MH - *Multigene Family MH - Open Reading Frames MH - Reverse Transcriptase Polymerase Chain Reaction MH - *Saccharomyces cerevisiae Proteins MH - Sequence Homology, Amino Acid EDAT- 1999/08/24 00:00 MHDA- 1999/08/24 00:01 CRDT- 1999/08/24 00:00 PHST- 1999/08/24 00:00 [pubmed] PHST- 1999/08/24 00:01 [medline] PHST- 1999/08/24 00:00 [entrez] AID - 10.1023/a:1008072319875 [doi] PST - ppublish SO - Virus Genes. 1999;18(3):243-64. doi: 10.1023/a:1008072319875.