Résumé
Since March 2009, pandemic A/H1N1/2009 influenza virus has been spreading throughout many countries including China. The emerged virus caused great harm to human health and social economy. Hemagglutinin (HA) is the most important viral surface glycoprotein, mainly possessing three kinds of functions: (1) binding to host cell receptor, (2) triggering the fusion between viral envelop and target cell membrane, (3) stimulating the body to generate the neutralizing antibody. Advances in the structure, primary function, evolution and antigenicity of pandemic A/H1N1/2009 influenza virus HA protein are reviewed in this paper.
Sujets)
Animaux , Humains , Évolution moléculaire , Glycoprotéine hémagglutinine du virus influenza , Chimie , Génétique , Allergie et immunologie , Métabolisme , Sous-type H1N1 du virus de la grippe A , Génétique , Allergie et immunologie , Virulence , Physiologie , Grippe humaine , Épidémiologie , Virologie , PandémiesRésumé
<p><b>OBJECTIVE</b>To construct the cloning vector of glycoprotein G2 gene of hantavirus (HV), to analyze the sequence of G2 gene by the phylogenetic tree, and to study the differences among glycoprotein G2 genes from the world around.</p><p><b>METHODS</b>Envelope glycoprotein G2 gene was amplified from four specimens of Shandong province by RT-PCR, and the product recombined into the PMD-18T vector. The clones that carry the G2 gene were identified. After sequencing, the gene sequence was handled with the software DNASTAR, compared with 24 strains worldwide and the phylogenetic tree was drawn.</p><p><b>RESULTS</b>HV G2 gene was amplified by RT-PCR from 4 specimens, named GM04-38.G2, ZB8.G2, JUN5-14.G2, RCH5.G2, respectively. The map of the phylogenetic tree showed that all the 4 strains belonged to SEO-type hantavirus. The analysis of the sequence showed that all the four HV strains had the highest rates of homology with Z37 strain. The sequence homology of SEO-type HV strains was from 82.3% to 99.8%.</p><p><b>CONCLUSION</b>The four cloning vectors containing the glycoprotein G2 genes were successfully constructed. Envelope glycoprotein G2 gene of four specimens from Shandong province had high homology rates.</p>