The virulent PRV isolate QXX (PRV-QXX) was kindly donated by Yong-Tao Li from the College of Veterinary Medicine, Henan Agricultural University [18 (link)]. The recombinant PRV strain PRV-GFP was derived from the PRV Hubei strain, with the TK gene replaced by a GFP expression cassette from the pEGFP-N1 plasmid [19 (link)].
Full-length porcine Rab6 cDNA was amplified by polymerase chain reaction (PCR). Rab6 cDNA was cloned and inserted into p3 × FLAG-CMV-10 expression plasmids to generate FLAG-Rab6, FLAG-Rab6 Q72L and FLAG-Rab6 T27N. All plasmids were transfected with Lipofectamine 3000 (L3000015, Invitrogen) according to the manufacturer’s instructions. The primer sequences used for gene amplification were as follows: Rab6-Fw: 5ʹ-ATGTCCACGGGCGGAGAC-3ʹ; Rab6-Rv: 5ʹ-TTAGCAGGAACAGCCTCCTTCA-3ʹ; Rab6 Q72L-Fw: 5ʹ-AGGTCTAGAGCGGTTCAGGAGCTTGATTCCTA-3ʹ; Rab6 Q72L-Rv: 5ʹ-TGAACCGCTCTAGACCTGCTGTGTCCCATAATTGC-3ʹ; Rab6 T27N-Fw: 5ʹ-GCGTTGGAAAGAACTCTTTGATCACCAGATTCATGTATGA-3ʹ; Rab6 T27N-Rv: 5ʹ-AAGAGTTCTTTCCAACGCTTTGCTCCCCCAGGA-3ʹ.