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Table 1 List of proteins co-expressed without and with chaperone combinations 1 to 5 and effects of chaperones on yields of purified, soluble target proteins, applying either the one-step or two-step procedure.

From: Chaperone-based procedure to increase yields of soluble recombinant proteins produced in E. coli

Protein

MW (kDa)

Increased solubility by

  

one step procedure

two step procedure

  

Yield increase

Best chaperone combination

Yield increase

Best chaperone combination

1Fringe

43

4

3

4

2Ap

54

4

3

3

22f21

52

3

3

4

LZip

41

1

n.d.

n.d.

Oskar3

118

2/4

2.5

2

2c18

50

3

4

8

4

2Tep4

68

3.5

4

13

4

BtKe

55

7

3

42

4

PhK

29

3

4

7

5

Tep1

8

3

5

6

1

Susy

86

2.5

3

5

5

Xklp3A+Xklp3B

20+ 16

2.5

4

3.5

4

B1R

59

3.5

3

3.5

3

E8R2

85

5.5

3

5.5

3

GTR1

35

3

4

3

4

HbpH

9

3.5

4

3.5

4

Rolled

43

4.5

3

4.5

3

Xklp3A4

44

2.5

5

2.5

5

Xklp3B3

70

2.5

4

2.5

4

Mash+ Susy

90+ 86

3

4

3

4

1Tep3

47

4

3

n.d.

n.d.

1Tep4

45

3.5

5

n.d.

n.d.

BtKc

64

3

5

n.d.

n.d.

E8R1

58

5

5

n.d.

n.d.

MaxF

7.5

3

4

n.d.

n.d.

Tev prot.

30

3.5

3

n.d.

n.d.

Xklp3A1

62

1*

-

2

Xklp3B1

40

1*

-

5

2Fringe

55

1

-

2

4

Xklp3A5

35

1

-

19

4

2Tep3

70

1

-

11

2

BtKp

55

1

-

28

4

Mash

91

1

-

3

2

PPAT

22

1

-

3

4

Eg5

95

1

-

1

-

F10L

72

1

-

1

-

Tep2

11

1

-

1

-

1AP

52

1

-

n.d.

n.d.

Chip

64

1

-

n.d.

n.d.

dLMO

37

1

-

n.d.

n.d.

Pex5P

38

1

-

n.d.

n.d.

Endostatin

42

1*

-

1*

-

Kringle

30

1*

-

1*

-

Lzip2

37

1*

-

1*

-

UCP1

33

1*

-

1*

-

Tlc4

57

1*

-

n.d.

n.d.

Xklp3A2

38

1*

-

n.d.

n.d.

Xklp3A3

72

1*

-

n.d.

n.d.

Xklp3B1

35

1*

-

n.d.

n.d.

Xpot1

108

1*

-

n.d.

n.d.

  1. The increase in solubility of target proteins relative to control cells without co-overexpression of chaperones (set as 1) is given in the column "yield increase". The chaperone combinations for optimal yield of each target protein in the one-step and two-step procedures are indicated. Proteins that exhibited solubility exclusively after chaperone co-overexpression are indicated by "∞". The symbol "*" indicates that no soluble protein was purified from cells with or without chaperone co-overproduction. n.d., not determined. The same protein name can appear more than one time in the list because different constructs (domains or fusions) have been used for its expression.