Recombinant protein expression
First Claim
1. A method for the expression of a recombinant protein of interest, said method comprising:
- a) culturing a host cell which expresses;
i) one or more genes encoding the recombinant protein(s) of interest;
ii) at least two genes encoding proteins selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs under conditions suitable for protein expression; and
b) separating said recombinant protein of interest from the host cell culture.
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Abstract
There are provided methods for the expression of a recombinant protein of interest, said methods comprising, in additional to various additional steps: a) culturing a host cell which expresses: i) one or more genes encoding the recombinant protein(s) of interest; ii) at least two genes encoding proteins selected from the group consisting of the chaperone proteins GroEL, GRoES, Dnak, DnaJ, GRpe, ClpB and their homologs (for example, Hsp104, Ydj1 and Ssa1 in yeast); under conditions suitable for protein expression; and separating said recombinant protein of interest from the host cell culture. Also provided are methods for increasing the degree of refolding of a recombinant protein of interest by ading a composition containing a chaperone protein to a preparation of the recombinant protein of interest in vitro.
19 Citations
46 Claims
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1. A method for the expression of a recombinant protein of interest, said method comprising:
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a) culturing a host cell which expresses;
i) one or more genes encoding the recombinant protein(s) of interest;
ii) at least two genes encoding proteins selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs under conditions suitable for protein expression; and
b) separating said recombinant protein of interest from the host cell culture. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 18, 20, 21, 22, 23, 24, 25, 26, 34, 41, 42, 43, 44)
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6. A method for the expression of a recombinant protein of interest, said method comprising:
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a) culturing under conditions suitable for protein expression a host cell which expresses;
i) one or more genes encoding one or more recombinant protein(s) of interest;
ii) one or more genes encoding proteins selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs;
iii) one or more genes encoding proteins selected from the group consisting of the small heatshock proteins of the IbpA family small heatshock proteins of the IbpB family and homologs thereof; and
(b) separating said recombinant protein of interest from the host cell culture.
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15. A method for the expression of a recombinant protein of interest, said method comprising:
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a) culturing a host cell which expresses;
i) one or more genes encoding the recombinant protein(s) of interest;
ii) one or more genes encoding one or more proteins selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs;
under conditions suitable for protein expression;
b) imposing a block in protein synthesis, for example, by the addition of an effective amount of a protein synthesis inhibitor to the culture system, once a desired level of recombinant protein of interest has accumulated; and
c) separating said recombinant protein of interest from the host cell culture. - View Dependent Claims (17, 19)
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16. A method for the expression of a recombinant protein of interest, said method comprising:
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a) culturing a host cell which expresses;
i) one or more genes encoding the recombinant protein(s) of interest;
ii) one or more genes encoding one or more proteins selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs;
under conditions suitable for protein expression;
b) imposing a reduction in gene transcription, for example, by removal of any agents that are effective to induce recombinant protein expression, or via the addition of a transcription blocking compound, once a desired level of recombinant protein of interest has accumulated; and
c) separating said recombinant protein of interest from the host cell culture. - View Dependent Claims (45)
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- 27. A method for increasing the degree of refolding of a recombinant protein of interest, said method comprising adding a composition containing a chaperone protein to a preparation of the recombinant protein of interest in vitro.
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36. The use of one or more genes encoding one or more proteins selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs, and one or more genes encoding proteins selected from the group consisting of the small heatshock proteins of the IbpA family, the small heatshock proteins of the IbpB family and homologs thereof, in the manufacture of a medicament for the treatment of disease in which the presence of aggregated proteins are implicated.
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37. The use of one or more selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs, and one or more genes encoding proteins selected from the group consisting of the small heatshock proteins of the IbpA family, the small heatshock proteins of the IbpB family and homologs thereof, in the manufacture of a medicament for the treatment of disease in which the presence of aggregated proteins are implicated.
- 38. A method of treating a patient suffering from a disease in which the presence of aggregated proteins is implicated, comprising administering one or more genes encoding one or more proteins selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs, and one or more genes encoding proteins selected from the group consisting of the small heatshock proteins of the IbpA family, the small heatshock proteins of the IbpB family and homologs thereof.
- 39. A method of treating a patient suffering from a disease in which the presence of aggregated proteins is implicated, comprising administering one or more proteins selected from the group consisting of the chaperone proteins GroEL, GroES, DnaK, DnaJ, GrpE, ClpB and their homologs, and one or more proteins selected from the group consisting of the small heatshock proteins of the IbpA family, the small heatshock proteins of the IbpB family and homologs thereof.
Specification