PMID- 7646363 OWN - NLM STAT- MEDLINE DCOM- 19950920 LR - 20200324 IS - 0304-8608 (Print) IS - 1432-8798 (Electronic) IS - 0304-8608 (Linking) VI - 140 IP - 7 DP - 1995 TI - Sequence analysis of open reading frames (ORFs) 2 to 4 of a U.S. isolate of porcine reproductive and respiratory syndrome virus. PG - 1313-9 AB - The sequence of ORFs 2 to 4 of a U.S. isolate of porcine reproductive and respiratory syndrome virus (PRRSV), ATCC VR2385, was determined by analysis of a cDNA lambda library. The cDNA clones containing PRRSV specific sequences were selected using a VR2385 ORF 4 specific PCR probe and sequenced. The ORFs 2, 3 and 4 overlapped each other and encoded polypeptides with predicted M(r) of 29.5 kDa (ORF 2), 28.7 kDa (ORF 3) and 19.5 kDa (ORF 4), respectively. No overlap was found between ORFs 4 and 5, and instead there was a 10 bp sequence which separated these two ORFs. The nucleic acid homology with corresponding ORFs of the European PRRSV isolate Lelystad virus (LV) was 65% for ORF 2, 64% for ORF 3 and 66% for ORF 4. Comparison of the ORF 4 sequences of VR2385 with that of another U.S. isolate MN-1b revealed only 86% amino acid sequence homology and the presence of deletions in the ORF 4 of MN-1b. Our results further strengthen the observation that there is sequence variation between US and European PRRSV isolates. FAU - Morozov, I AU - Morozov I AD - Veterinary Medical Research Institute, College of Veterinary Medicine, Iowa State University, Ames, USA. FAU - Meng, X J AU - Meng XJ FAU - Paul, P S AU - Paul PS LA - eng SI - GENBANK/U20788 PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PL - Austria TA - Arch Virol JT - Archives of virology JID - 7506870 RN - 0 (DNA, Viral) RN - 0 (RNA, Messenger) RN - 0 (RNA, Viral) SB - IM MH - Amino Acid Sequence MH - Animals MH - Arterivirus/*genetics/isolation & purification MH - Base Sequence MH - Cloning, Molecular MH - DNA, Viral/genetics MH - Molecular Sequence Data MH - *Open Reading Frames MH - RNA, Messenger/genetics MH - RNA, Viral/genetics MH - Sequence Homology, Amino Acid MH - Swine/*virology MH - United States PMC - PMC7087238 EDAT- 1995/01/01 00:00 MHDA- 1995/01/01 00:01 PMCR- 2020/03/23 CRDT- 1995/01/01 00:00 PHST- 1995/01/01 00:00 [pubmed] PHST- 1995/01/01 00:01 [medline] PHST- 1995/01/01 00:00 [entrez] PHST- 2020/03/23 00:00 [pmc-release] AID - BF01322758 [pii] AID - 10.1007/BF01322758 [doi] PST - ppublish SO - Arch Virol. 1995;140(7):1313-9. doi: 10.1007/BF01322758.