Method for producing extracellular proteins from genus Tepidimonas

Patent metadata

Field	Value
Publication number	US-9580738-B2
Application number	US-201514838612-A
Country	US
Kind code	B2
Filing date	Aug 28, 2015
Priority date	Dec 25, 2014
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

The disclosure provides a method for producing extracellular proteins from genus Tepidimonas , including: performing a fermentation culturing to a bacteria of genus Tepidimonas with a culturing medium to form a fermented liquid, wherein the composition of the culturing medium includes a carbon source which is an organic acid, selected from a group consisting of acetate, lactate and butyrate; a nitrogen source selected from a group consisting of (NH 4 ) 2 SO 4 , NH 4 NO 3 , NH 4 Cl and urea; phosphate; carbonate; MgCl 2 ; yeast extract; and trace elements, and wherein the gas feeding rate for the fermentation culturing is about 0-0.1 vvm; and after the fermentation culturing is completed, collecting the fermented liquid, wherein the fermented liquid contains extracellular protein secreted from the bacteria of genus Tepidimonas.

First claim

What is claimed is:

1. A method of producing extracellular proteins from genus Tepidimonas , comprising:
fermenting a Tepidimonas in a fermenter with a culture medium in an air feeding type to obtain a suspension; and
wherein the culture medium comprises:
a carbon source which is an organic acid, selected from a group consisting of acetate, lactate and butyrate;
a nitrogen source selected from a group consisting of ammonium sulfate ((NH 4 ) 2 SO 4 ), ammonium nitrate (NH 4 NO 3 ), ammonium chloride (NH 4 Cl) and urea;
a phosphate;
a carbonate;
magnesium chloride (MgCl 2 );
a yeast extract; and
trace elements;
collecting the suspension, the suspension comprising the extracellular proteins from genus Tepidimonas,
wherein the air feeding type is about 0.001-0.1 vvm air feeding rate.

2. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the genus Tepidimonas comprises Tepidimonas fonticaldi, Tepidimonas ignava, Tepidimonas aquatic or Tepidimonas taiwanesis.

3. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the Tepidimonas is Tepidimonas fonticaldi sp. nov.

4. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 3 , wherein the Tepidimonas fonticaldi is Tepidimonas fonticaldi sp. nov KCTC 12528BP.

5. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the content of the carbon source is about 0.1 g/L-15 g/L, the content of the nitrogen source is about 0.1 g/L-15 g/L, the content of the phosphate is about 0.1 g/L-30 g/L, the content of the carbonate is about 0.1 g/L-20 g/L, the content of the MgCl 2 is about 0.01 g/L-10 g/L, the content of the yeast extract is about 0.1 g/L-20 g/L, and the content of the trace elements is about 0.01 g/L-1 g/L.

6. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the carbon-nitrogen weight ratio of the carbon source to the nitrogen source is about 1-20 in the culture medium.

7. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the carbon source is acetate.

8. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the nitrogen source is ammonium sulfate ((NH 4 ) 2 SO 4 ).

9. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the phosphate comprises potassium dihydrogen phosphate (KH 2 PO4), disodium hydrogen phosphate (Na 2 HPO 4 ) or dipotassium phosphate (K 2 HPO 4 ).

10. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the phosphate is dipotassium phosphate (K 2 HPO 4 ).

11. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the carbonate is sodium bicarbonate (NaHCO 3 ).

12. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the trace elements comprises zinc (Zn), manganese (Mn), boron (B), cobalt (Co), copper (Cu), nickel (Ni) and molybdenum (Mo).

13. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the fermenting step is in a stirring which the stirring rate is about 50-500 rpm.

14. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the fermenting step is stirring at the rate of about 200 rpm.

15. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the temperature of fermenting step is about 40-80° C.

16. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the temperature of fermenting step is about 50° C.

17. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the air feeding of fermenting step is comprises an air.

18. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the fermenting is conducted in a fermenter, the air feeding type comprises directly feeding the air into the bottom of the culture medium; circulating the culture medium by introducing the medium out from the fermenter and sending it back into the fermenter and, during the circulation, the air is mixed into the culture medium before it is sent back; or circulating the culture medium by introducing the medium out from the fermenter and sending it back into the fermenter and feeding the air into the top of the fermenter.

19. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the fermenting is conducted in a fermenter, and the air feeding type is directly feeding the air into the bottom of the culture medium.

20. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 19 , wherein an air feeding for the fermenting is air.

21. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 20 , wherein the air feeding rate for the fermenting is about 0.001-0.1 vvm.

22. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 20 , wherein the air feeding rate for the fermenting is about 0.025 vvm.

23. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein the fermenting is conducted in a fermenter, and circulating the culture medium by introducing the medium out from the fermenter and sending it back into the fermenter in which, during the circulation, the air is mixed into the culture medium before it is sent back.

24. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 23 , wherein the air mixing for circulating is feeding air.

25. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 23 , wherein the medium circulation rate is about 0.1-12 L/hr.

26. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 23 , wherein the medium circulation rate is about 3 L/hr.

27. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 24 , wherein the air feeding rate for the feeding is about 0.001-0.1 vvm.

28. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 24 , wherein the air feeding rate for the feeding is about 0.025 vvm.

29. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 24 , wherein the medium circulation rate is about 3 L/hr, and the air feeding rate for feeding is about 0.025 vvm.

30. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein an initial pH of the fermenting is about pH 5-pH 9.

31. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein an initial pH of the fermenting is about pH 7.

32. The method of producing extracellular proteins from genus Tepidimonas as claimed in claim 1 , wherein a final pH of the fermenting is about pH 4-pH 10.

Assignees

• Ind Tech Res Inst

Inventors

• Han Yin-Lung
• Chang Jo-Shu
• Lou Yung-Chong
• Cheng Chieh-Lun
• Liu Chih-Hsi

Classifications

• C12P21/00 Primary

  Preparation of peptides or proteins (single cell protein C12N1/00) · CPC title