Optimization of the production of gurmarin, a sweet-taste-suppressing protein, secreted by the methylotrophic yeast Pichia pastoris
Optimization of the production of gurmarin, a sweet-taste-suppressing protein, secreted by the methylotrophic yeast Pichia pastoris
复制标题
甲基营养酵母毕赤酵母分泌的古马林(一种甜味抑制蛋白)生产的优化
DOI:
10.1007/s00253-012-3897-3
复制
发表时间:
--
影响因子:
5
通讯作者:
Briand L
中科院分区:
文献类型:
--
作者:
Sigoillot M;Brockhoff A;Lescop E;Poirier N;Meyerhof W;Briand L
Gurmarin, a 35-residue polypeptide, is known to selectively inhibit responses to sweet substances in rodents without affecting responses to other basic taste stimuli, such as NaCl, HCl, and quinine. Here, we report the heterologous expression of gurmarin using the methylotrophic yeastPichia pastoris. Gurmarin was secreted into the buffered minimal medium using the α-factor preprosequence without the EAEA spacer peptide ofSaccharomyces cerevisiaeand was under the control of the methanol-inducible alcohol oxidase promoter. We found that gurmarin accumulated in the yeast culture medium reaching 5 mg per liter of culture over an expression period of 4 days. To compare the production level and the signal peptide processing, the N-terminal amino acid of gurmarin was substituted by a glutamic acid residue. This construct resulted in a 6-fold increase in the level of gurmarin secretion leading to 30 mg of purified protein per liter of culture. Purified recombinant gurmarin resulting from both constructs was characterized using mass spectrometry. Circular dichroism and NMR spectroscopy revealed that recombinant gurmarin was properly folded and had secondary and tertiary structures. We also confirmed its capability to inhibit the rat heterodimeric sweet taste T1R2/T1R3 receptor by functional expression in human embryonic kidney HEK293T cells. The high level of fully active gurmarin obtained inP. pastorismakes this expression system attractive for fermentor growth and pharmacological investigations of taste receptor and gurmarin functions.
登录
查看更多内容
影响因子:
2.9
作者:
Ladokhin, AS;Selsted, ME;White, SH
通讯作者:
White, SH
影响因子:
2.5
作者:
Y. Ninomiya;T. Imoto;T. Sugimura
通讯作者:
T. Sugimura
影响因子:
64.5
作者:
D. Julius;A. Brake;L. Blair;R. Kunisawa;J. Thorner
通讯作者:
J. Thorner
影响因子:
2.7
作者:
Katsuaki Arai;R. Ishima;Soichi Morikawa;A. Miyasaka;T. Imoto;S. Yoshimura;S. Aimoto;K. Akasaka
通讯作者:
K. Akasaka
DOI:
10.1152/ajpregu.1997.272.3.r1002
发表时间:
1997
期刊:
The American journal of physiology
影响因子:
--
作者:
Y. Ninomiya;M. Inoue;T. Imoto;K. Nakashima
通讯作者:
K. Nakashima