摘要:
Plasmid comprising a DNA tag encoding a peptide tag of the sequence MX1(X2X3)n wherein X1 represents K, R or H; X2 represents A, G, H, M, S or T; X3 represents K, R, H, A, Q or V; n represents an integer of 1 or larger; and wherein said DNA is operably-linked to a promoter sequence are provided.
摘要:
The present invention relates to a novel non-pathogenic Escherichia coli (E. coli) B BL21 strain comprising a deletion of group II capsular gene cluster, and the use thereof for the production of peptides.
摘要:
The present invention relates to a novel non-pathogenic Escherichia coli (E. coli) B BL21 strain comprising a deletion of group II capsular gene cluster, and the use thereof for the production of peptides.
摘要:
A process for expression of a protein product in Aspergillus oryzae is disclosed. The process comprises transforming Aspergillus oryzae with a vector system comprising DNA-sequences encoding functions facilitating gene expression, a suitable marker for selection of transformants, and a DNA-sequence encoding the desired protein product. The process enables industrial production of many different polypeptides and proteins in A. oryzae. Examples of such products are chymosin or prochymosin other rennets, proteases, lipases and amylases. Also disclosed is an effective promoter for expression of a protein in Aspergillus. A preferred promoter is the TAKA-amylase promoter or functional parts thereof. There is also provided a process for the production of a recombinant Humicola lipase. The recombinant Humicola lipase from A. oryzae differs from the native lipase in having a greater glycosylation and in exhibiting an improved thermostability.
摘要:
The invention relates to a method of producing an extracellular protein in a bacterium provided with an inner and an outer cell membrane, the method comprising: (a) providing a recombinant vector including a DNA construct comprising a DNA sequence encoding the prepropeptide or part of the prepropeptide of a bacterial extracellular protease selected from the group consisting of Achromobacter lyticus protease I, Bacillus metalloproteases and Bacillus serine proteases preceding and operably connected to a DNA sequence encoding a desired protein, (b) transforming cells of a microorganism provided with an inner and outer cell membrane with the recombinant vector of step (a), (c) culturing the transformed cells of step (b) under conditions permitting expression of said DNA insert and leakage of the bacterial extracellular protease propeptide fused to the desired protein into the culture medium, and (d) recovering the resulting protein from the medium.