PMID- 17553585 OWN - NLM STAT- MEDLINE DCOM- 20071101 LR - 20191210 IS - 0168-1702 (Print) IS - 0168-1702 (Linking) VI - 128 IP - 1-2 DP - 2007 Sep TI - Expression and stability of foreign tags inserted into nsp2 of porcine reproductive and respiratory syndrome virus (PRRSV). PG - 106-14 AB - The nonstructural protein 2 (nsp2) of porcine reproductive and respiratory syndrome virus (PRRSV) is the single largest protein produced during infection. The cDNA of the pCMV-129 infectious PRRSV clone was modified for accepting foreign tags by first creating unique Mlu I and SgrA I restrictions sites at nucleotide (nt) positions 3219 and 3614, respectively, within the C-terminal region of nsp2. cDNAs encoding oligo- and polypeptide tags, including FLAG, enhanced green fluorescent protein (EGFP) and luciferase were inserted into the newly created restriction sites. The results showed that only the EGFP-containing genomes were properly expressed and produced virus. EGFP fluorescence, but not EGFP immunoreactivity, was lost during passage of recombinant EGFP viruses in culture. Sequencing of a fluorescent-negative EGFP virus showed that the EGFP remained intact, except for the appearance of arginine to cysteine mutation at position 96, which may interfere with chromophore formation or function. FAU - Kim, Dal-Young AU - Kim DY AD - Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, KS 66506, USA. FAU - Calvert, Jay G AU - Calvert JG FAU - Chang, Kyeong-Ok AU - Chang KO FAU - Horlen, Kyle AU - Horlen K FAU - Kerrigan, Maureen AU - Kerrigan M FAU - Rowland, Raymond R R AU - Rowland RR LA - eng GR - P20 RR17708/RR/NCRR NIH HHS/United States GR - P20-RR017686/RR/NCRR NIH HHS/United States PT - Evaluation Study PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20070605 PL - Netherlands TA - Virus Res JT - Virus research JID - 8410979 RN - 0 (Bacterial Proteins) RN - 0 (Oligopeptides) RN - 0 (Peptides) RN - 0 (enhanced green fluorescent protein) RN - 147336-22-9 (Green Fluorescent Proteins) RN - 98849-88-8 (FLAG peptide) RN - EC 1.13.12.- (Luciferases) RN - EC 3.1.21.- (endodeoxyribonuclease MluI) RN - EC 3.1.21.- (endodeoxyribonuclease SgrAI) RN - EC 3.1.21.4 (Deoxyribonucleases, Type II Site-Specific) RN - EC 3.4.22.- (Cysteine Endopeptidases) RN - EC 3.4.22.- (nsP2 proteinase) SB - IM MH - Animals MH - Bacterial Proteins/metabolism MH - Cell Line MH - Cysteine Endopeptidases/genetics/*metabolism MH - Deoxyribonucleases, Type II Site-Specific/metabolism MH - Gene Expression Regulation, Viral MH - Green Fluorescent Proteins/genetics/*metabolism MH - Luciferases/genetics/*metabolism MH - Microscopy, Confocal MH - Mutagenesis, Site-Directed MH - Oligopeptides MH - Peptides/genetics/*metabolism MH - Porcine respiratory and reproductive syndrome virus/genetics/metabolism/*physiology MH - Recombination, Genetic MH - Reverse Transcriptase Polymerase Chain Reaction MH - Swine/virology MH - Virus Replication EDAT- 2007/06/08 09:00 MHDA- 2007/11/02 09:00 CRDT- 2007/06/08 09:00 PHST- 2006/05/26 00:00 [received] PHST- 2007/04/03 00:00 [revised] PHST- 2007/04/16 00:00 [accepted] PHST- 2007/06/08 09:00 [pubmed] PHST- 2007/11/02 09:00 [medline] PHST- 2007/06/08 09:00 [entrez] AID - S0168-1702(07)00151-7 [pii] AID - 10.1016/j.virusres.2007.04.019 [doi] PST - ppublish SO - Virus Res. 2007 Sep;128(1-2):106-14. doi: 10.1016/j.virusres.2007.04.019. Epub 2007 Jun 5.