Characterisation of a hyperthermophilic transketolase from Thermotoga maritima DSM3109 as a biocatalyst for 7-keto-octuronic acid synthesis.
Characterisation of a hyperthermophilic transketolase from Thermotoga maritima DSM3109 as a biocatalyst for 7-keto-octuronic acid synthesis.
复制标题
DOI:
10.1039/d1ob01237a
复制
发表时间:
2021-07-28
影响因子:
3.2
通讯作者:
Ward JM
中科院分区:
文献类型:
--
作者:
Cárdenas-Fernández M;Subrizi F;Dobrijevic D;Hailes HC;Ward JM
Transketolase (TK) is a fundamentally important enzyme in industrial biocatalysis which carries out a stereospecific carbon–carbon bond formation, and is widely used in the synthesis of prochiral ketones. This study describes the biochemical and molecular characterisation of a novel and unusual hyperthermophilic TK from Thermotoga maritima DSM3109 (TKtmar). TKtmar has a low protein sequence homology compared to the already described TKs, with key amino acid residues in the active site highly conserved. TKtmar has a very high optimum temperature (>90 °C) and shows pronounced stability at high temperature (e.g. t1/2 99 and 9.3 h at 50 and 80 °C, respectively) and in presence of organic solvents commonly used in industry (DMSO, acetonitrile and methanol). Substrate screening showed activity towards several monosaccharides and aliphatic aldehydes. In addition, for the first time, TK specificity towards uronic acids was achieved with TKtmar catalysing the efficient conversion of d-galacturonic acid and lithium hydroxypyruvate into 7-keto-octuronic acid, a very rare C8 uronic acid, in high yields (98%, 49 mM). Hyperthermophilic and thermostable transketolase from Thermotoga maritima (TKtmar) catalysed the efficient conversion of d-galacturonic acid into 7-keto-octuronic acid.
登录
查看更多内容
影响因子:
5.2
作者:
James P;Isupov MN;De Rose SA;Sayer C;Cole IS;Littlechild JA
通讯作者:
Littlechild JA
DOI:
10.1098/rspb.2000.1397
发表时间:
2001-03-07
影响因子:
4.7
作者:
Hurst, LD;Merchant, AR
通讯作者:
Merchant, AR
影响因子:
--
作者:
Morris, KG;Smith, MEB;Woodley, JM
通讯作者:
Woodley, JM
影响因子:
5.8
作者:
Fullam E;Pojer F;Bergfors T;Jones TA;Cole ST
通讯作者:
Cole ST
影响因子:
3.2
作者:
Payongsri, Panwajee;Steadman, David;Dalby, Paul A.
通讯作者:
Dalby, Paul A.