Defense recombinant HAEMOPHILUSINFLUENZAE nucleic acid molecule encoding a (Haemophilus influenzae) high molecular weight proteins, transformation vectors, transformed strains and protein production methods using them

摘要

Protective high molecular weight (HMW) proteins are produced recombinantly by expression from E. coli by using a promoter effective in E. coli and a nucleic acid molecule which contains a modified operon of a non-typeable strain of Haemophilus. The modified operon contains the portion only of the A region which encodes the mature HMW protein and the complete B and C regions of the operon. Enhanced levels of expression of the HMW proteins can be achieved by including the E. coli cer gene, a further copy of the portion of the A region of the operon encoding the mature protein or both, in the expression vector. Nucleotide and deduced amino acid sequences of the hmw1 and hmw2 genes and HMW1 and HMW2 proteins, respectively, of several non-typeable Haemophilus influenzae strain have been identified.