Bacteria with increased levels of protein secretion,...

Chemistry: natural resins or derivatives; peptides or proteins; – Proteins – i.e. – more than 100 amino acid residues

Reexamination Certificate

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C435S183000, C435S193000, C435S194000

Reexamination Certificate

active

07655754

ABSTRACT:
The invention relates to bacteria that have increased levels of protein secretion due to genetic modification, to nucleotide sequences and gene structures containing at least one gene coding for a SecA protein having increased levels of protein secretion, to a SecA having increased levels of protein secretion, and to a method for producing desired proteins using the inventive bacteria. The invention also relates to nucleic acids coding for a SecA protein having increased levels of protein secretion, containing a SecA gene sequence or allele, a SecA homologue or derivative, or nucleotide sequences hybridising therewith and comprising at least one mutation. Surprisingly, just one mutation in a nucleotide of a SecA gene leads to increased levels of protein secretion or to protein secretion for the first time.

REFERENCES:
patent: 0 892 064 (1999-01-01), None
patent: 0 892 064 (2000-01-01), None
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Kisselev, Structure, vol. 10, pp. 8-9, 2002.
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Jarosik et al. (Journal of Bacteriology, 1991, vol. 173, No. 2, pp. 860-868).
Baud et al., “Allosteric Communication Between Signal Peptides and the SecA Protein Dead Motor ATPase Domain,”The Journal of Biological Chemistry, 277(16):13724-13731 (2002).
Freudl et al., “Proteinsekretion bei Gram-positiven Bakterien: Molekulare Grundlagen und biotechnologische Aspekte,” Biospektrum 4(1):29-33 (1998).
Keilhauer et al., “Isoleucine Synthesis inCorynebacterium glutamicum: Molecular Analysis of theilvB-ilvN-ilvCOperon,” Journal of Bacteriology, 175(17):5595-5603 (1993).
Klein et al., “Functional Characterization of theStaphylococcus carnosusSecA Protein inEscherichia coliandBacillus subtilissecA Mutant Strains,”FEMS Microbiology Letters, 131:271-277 (1995).
Liebl et al., “Transfer ofBrevibacterium divaricatumDSM 20297T, “Brevibacterium flavum” DSM 20411, “Brevibacterium lactofermentum” DSM 20412 and DSM 1412, andCorynebacterium liliumDSM 20137TtoCorynebacterium glutamicumand Their Distinction by rRNA Gene Restriction Patterns,” International Journal of Systematic Bacteriology, 41(2):255-260 (1991).
Matsumoto et al., “Genetic Dissection of SecA: Suppressor Mutations Against thesecY205Translocase defect,”Genes to Cells, 5 :991-999 (2000).

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