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Table 2 Recombinant protein production in bioreactor and SSB system

From: Smart sustainable bottle (SSB) system for E. coli based recombinant protein production

Protein

Cultivation vessel

OD600

Final pH

Expression level [%]1

Fluorescence2

Fluorescence/OD600 3

W

S

GFP

Bioreactor (2-L) constant agitation (500 rpm)

17.6 ± 0.5

6.8

8

9

15420 ± 120

857 ± 25

 

SSB system (2-L)

20.6 ± 0.3

5.9

8

9

18172 ± 140

865 ± 14

hFGF-2

Bioreactor (2-L) constant agitation (500 rpm)

18.8 ± 0.5

6.8

9

8

  
 

Bioreactor (30-L) dissolved oxygen-stat (50%) #

18.0 ± 0.6

6.8

8

7

  
 

SSB system (2-L)

18.9 ± 0.3

5.9

9

7

  
 

SSB system (2-L)

21.0 ± 0.4

6.0

9

8

  

GST-GFP

Bioreactor (2-L) constant agitation (500 rpm)

22.3 ± 0.1

6.8

10

7

11569 ± 163

526 ± 8

 

SSB system (2-L)

24.7 ± 0.2

5.8

10

6

13044 ± 102

522 ± 6

 

SSB system (2-L) with “booster” amino acids

26.2 ± 0.2

6.5

10

9

17981 ± 158

692 ± 8

TRX-hLIF

Bioreactor (2-L) constant agitation (500 rpm)

16.0 ± 0.2

6.8

7

1

  
 

Bioreactor (2-L) dissolved oxygen-stat (30%)

18.9 ± 0.2

6.8

8, 7*

2, 3*

  
 

SSB system (2-L)

19.0 ± 0.3

5.9

7

1

  
 

SSB system (2-L)

18.9 ± 0.3

6.0

7

2

  
 

SSB system (2-L) with “booster” amino acids

23.2 ± 0.4

6.6

7, 7*

3, 7*

  
 

SSB system (2-L) with “booster” amino acids

22.6 ± 0.1

6.5

8

3

  
  1. 1Percentage of target protein in whole cell protein (W) and soluble fraction of whole cell protein (S). 2Volumetric GFP fluorescence. 3Cell specific GFP fluorescence. #Details of comparative hFGF-2 production in a conventional 30-L bioreactor at 50% air saturation and the SSB system are shown in Additional file 2: Figure S1. *Cells were disrupted by high pressure homogenization.