Synthesis and characterization of Respiratory Syncytial Virus protein G related peptides containing two disulfide bridges

被引:13
作者
Beck, A
Zorn, N
Bussat, MC
Haeuw, JF
Corvaïa, N
Nguyen, TN
Bonnefoy, JY
Van Dorsselaer, A
机构
[1] Ctr Immunol Pierre Fabre, Dept Chem Phys, F-74164 St Julien Genevois, France
[2] Univ Strasbourg 1, Lab Spectrometrie Masse BioOrgan, F-67000 Strasbourg, France
来源
JOURNAL OF PEPTIDE RESEARCH | 2000年 / 55卷 / 01期
关键词
disulfide bridges; mass spectrometry; peptide mapping; RSV G proteins; subunit vaccines;
D O I
10.1034/j.1399-3011.2000.00148.x
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Respiratory Syncytial Virus (RSV) is the most important cause of bronchiolitis and viral pneumonia in infants and young children. Approximately 100 000 children are hospitalized In the USA each year as a result of RSV infections. During the research and development of subunit human Respiratory Syncytial Virus vaccines (hRSV), we have produced numerous synthetic peptides and recombinant proteins containing the four cysteines of the highly conserved central region of the G attachment protein. For several of these disulfide-containing peptides, all possible oxidized isomers were synthesized using Various oxidation conditions and resulting in different ratios of isomers. Each isolated isomer was fully characterized by RP-HPLC, FZCE and ES-MS after purification by preparative RP-HPLC. The different cysteine pairings were unambiguously established after enzymatic digestion, LC-MS analysis and peptide microsequencing. These synthesis and analytical methods were developed for the characterization on one hand, of recombinant fusion protein BBG2Na which is currently being investigated in advanced clinical phases as a very promising vaccine candidate, and on the other hand, for peptides which were synthesized to be evaluated as conjugate vaccines or as immunochemical tools, after covalent coupling to carrier proteins. Furthermore, these studies allowed us to determine which of the different possible isomers was the most stable and probably the preferred form in native conditions. Finally, the different oxidation and analysis conditions, should be useful for disulfide pairing studies of other peptides and proteins having-the same 'xCxxCxxxxxCxxxCx' framework, such as G proteins of non-human RSV strains, developed by other groups as veterinary vaccine candidates for example.
引用
收藏
页码:24 / 35
页数:12
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