Partial Cloning and Sequence Analysis of the gag Gene of Jaagsiekte Sheep Retrovirus NM Strain
Abstract: In order to amplify partial gag gene of Jaagsiekte sheep retrovirus Inner Mongolia strain, a pair of primers was designed according to the GenBank sequence . The fragment of gag gene was obtained by polymerase chain reaction (PCR), and the gene was cloned into PMD-18 T vector and identified by EcoR I and Sal I digestion. The nucleotide and amino acid sequences of NM strain partial gag gene were compared with the counterpart sequeuces of South Africa strain (Accession No. NC-001494) and USA strain (Accession No. AF105220). The nucleotide and amino acid homology of partial gag gene were 83%, 81.5% and 84%, 83%, respectively. This is the first JSRV nucleotide sequence reported in China.