Incorporation of alternative amino acids into cyanophycin by different cyanophycin synthetases heterologously expressed in Corynebacterium glutamicum

Wördemann R, Wiefel L, Wendisch VF, Steinbüchel A (2021)
AMB Express 11(1): 55.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Wördemann, Ramona; Wiefel, Lars; Wendisch, Volker F.UniBi ; Steinbüchel, Alexander
Abstract / Bemerkung
**Abstract**
Cyanophycin (multi-l-arginyl-poly-l-aspartic acid; also known as cyanophycin grana peptide [CGP]) is a biopolymer that could be used in various fields, for example, as a potential precursor for the synthesis of polyaspartic acid or for the production of CGP-derived dipeptides. To extend the applications of this polymer, it is therefore of interest to synthesize CGP with different compositions. A recent re-evaluation of the CGP synthesis inC. glutamicumhas shown thatC. glutamicumis a potentially interesting microorganism for CGP synthesis with a high content of alternative amino acids. This study shows that the amount of alternative amino acids can be increased by using mutants ofC. glutamicumwith altered amino acid biosynthesis. With the DM1729 mutant, the lysine content in the polymer could be increased up to 33.5 mol%. Furthermore, an ornithine content of up to 12.6 mol% was achieved with ORN2(Pgdh4). How much water-soluble or insoluble CGP is synthesized is strongly related to the used cyanophycin synthetase. CphADhsynthesizes soluble CGP exclusively. However, soluble CGP could also be isolated from cells expressing CphA6308Δ1 or CphA6308Δ1_C595S in addition to insoluble CGP in all examined strains. The point mutation in CphA6308Δ1_C595S partially resulted in a higher lysine content. In addition, the CGP content could be increased to 36% of the cell dry weight under optimizing growth conditions inC. glutamicumATCC13032. All known alternative major amino acids for CGP synthesis (lysine, ornithine, citrulline, and glutamic acid) could be incorporated into CGP inC. glutamicum.
Erscheinungsjahr
2021
Zeitschriftentitel
AMB Express
Band
11
Ausgabe
1
Art.-Nr.
55
eISSN
2191-0855
Page URI
https://pub.uni-bielefeld.de/record/2953929

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Wördemann R, Wiefel L, Wendisch VF, Steinbüchel A. Incorporation of alternative amino acids into cyanophycin by different cyanophycin synthetases heterologously expressed in Corynebacterium glutamicum. AMB Express. 2021;11(1): 55.
Wördemann, R., Wiefel, L., Wendisch, V. F., & Steinbüchel, A. (2021). Incorporation of alternative amino acids into cyanophycin by different cyanophycin synthetases heterologously expressed in Corynebacterium glutamicum. AMB Express, 11(1), 55. https://doi.org/10.1186/s13568-021-01217-5
Wördemann, R., Wiefel, L., Wendisch, V. F., and Steinbüchel, A. (2021). Incorporation of alternative amino acids into cyanophycin by different cyanophycin synthetases heterologously expressed in Corynebacterium glutamicum. AMB Express 11:55.
Wördemann, R., et al., 2021. Incorporation of alternative amino acids into cyanophycin by different cyanophycin synthetases heterologously expressed in Corynebacterium glutamicum. AMB Express, 11(1): 55.
R. Wördemann, et al., “Incorporation of alternative amino acids into cyanophycin by different cyanophycin synthetases heterologously expressed in Corynebacterium glutamicum”, AMB Express, vol. 11, 2021, : 55.
Wördemann, R., Wiefel, L., Wendisch, V.F., Steinbüchel, A.: Incorporation of alternative amino acids into cyanophycin by different cyanophycin synthetases heterologously expressed in Corynebacterium glutamicum. AMB Express. 11, : 55 (2021).
Wördemann, Ramona, Wiefel, Lars, Wendisch, Volker F., and Steinbüchel, Alexander. “Incorporation of alternative amino acids into cyanophycin by different cyanophycin synthetases heterologously expressed in Corynebacterium glutamicum”. AMB Express 11.1 (2021): 55.
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2021-04-16T07:34:55Z
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