Crystal structure of a novel N-substituted L-amino acid dioxygenase from Burkholderia ambifaria AMMD.
Crystal structure of a novel N-substituted L-amino acid dioxygenase from Burkholderia ambifaria AMMD.
复制标题
DOI:
10.1371/journal.pone.0063996
复制
发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Tanokura M
中科院分区:
文献类型:
--
作者:
Qin HM;Miyakawa T;Jia MZ;Nakamura A;Ohtsuka J;Xue YL;Kawashima T;Kasahara T;Hibi M;Ogawa J;Tanokura M
A novel dioxygenase from Burkholderia ambifaria AMMD (SadA) stereoselectively catalyzes the C3-hydroxylation of N-substituted branched-chain or aromatic L-amino acids, especially N-succinyl-L-leucine, coupled with the conversion of α-ketoglutarate to succinate and CO2. To elucidate the structural basis of the substrate specificity and stereoselective hydroxylation, we determined the crystal structures of the SadA.Zn(II) and SadA.Zn(II).α-KG complexes at 1.77 Å and 1.98 Å resolutions, respectively. SadA adopted a double-stranded β-helix fold at the core of the structure. In addition, an HXD/EXnH motif in the active site coordinated a Zn(II) as a substitute for Fe(II). The α-KG molecule also coordinated Zn(II) in a bidentate manner via its 1-carboxylate and 2-oxo groups. Based on the SadA.Zn(II).α-KG structure and mutation analyses, we constructed substrate-binding models with N-succinyl-L-leucine and N-succinyl-L-phenylalanine, which provided new insight into the substrate specificity. The results will be useful for the rational design of SadA variants aimed at the recognition of various N-succinyl L-amino acids.
登录
查看更多内容
影响因子:
4.8
作者:
Elkins, JM;Hewitson, KS;Schofield, CJ
通讯作者:
Schofield, CJ
DOI:
10.1111/j.1742-4658.2009.07085.x
发表时间:
2009-07
期刊:
The FEBS journal
影响因子:
--
作者:
Helmetag V;Samel SA;Thomas MG;Marahiel MA;Essen LO
通讯作者:
Essen LO
影响因子:
5.7
作者:
Chowdhury, Rasheduzzaman;McDonough, Michael A.;Schofield, Christopher J.
通讯作者:
Schofield, Christopher J.
DOI:
10.1107/s0907444998003254
发表时间:
1998-09-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者:
Warren, GL
DOI:
10.1073/pnas.0911565107
发表时间:
2010-03-02
影响因子:
11.1
作者:
Grzyska, Piotr K.;Appelman, Evan H.;Proshlyakov, Denis A.
通讯作者:
Proshlyakov, Denis A.