摘要:
A method for manipulating a nucleoside includes converting guanosine to 5- methyluridine by means of biocatalytic transglycosylation. The biocatalyst comprises a combination of a purine nucleoside phosphorylase from Bacillus halodurans, PNPase (BH1531 ) of sequence ID No 1, or a protein with at least 90% sequence similarity thereto, and a pyhmidine nucleoside phosphorylase (PyNPase).
摘要:
A method for manipulating a nucleoside includes converting guanosine to 5- methyluridine by means of biocatalytic transglycosylation. The biocatalyst comprises a combination of a purine nucleoside phosphorylase from Bacillus halodurans, PNPase (BH1531 ) of sequence ID No 1, or a protein with at least 90% sequence similarity thereto, and a pyhmidine nucleoside phosphorylase (PyNPase).
摘要:
A method of producing a flagellin-based chimeric protein includes culturing a B. halodurans BhFD05 (Δhag, ΔfIiD, ΔwprA, ΔaIp, Δapr, Δvpr, Δasp) strain deposited under Accession Number 41533 at the NCIMB. The strain is caused to express and secrete high levels of a flagellin-based chimeric protein into an extracellular growth medium. The flagellin-based chimeric protein comprises a heterologous peptide (i) inserted in-frame into a flagellin variable region which is flanked on its N-terminal side by an N-terminal fragment of a flagellin polypeptide and, optionally, flanked on its C-terminal side by a C- terminal fragment of a flagellin polypeptide, or (ii) fused to the C-terminal of a flagellin polypeptide.
摘要:
The invention provides f lagellin-based fusion proteins (FBFP) useful for a variety of purposes, in bioremediation to remove metal ions from a liquid, to express an enzyme or an immunogen, nucleic acids encoding the FBFP, vectors containing the nucleic acids, and host cells harboring the vectors. Furthermore, the invention provides methods for obtaining over-expression and surface display of heterologous polypeptides in Gram-positive bacterial cells in Bacillus halodurans in particular. In addition, the invention features gene-disrupted bacteria useful for expressing the recombinant FBFP on their surfaces. Also included in the invention are genetic constructs useful for making FBFP and methods of using the FBFP.