Modifying the Steric Properties in the Second Coordination Sphere of Designed Peptides Leads to Enhancement of Nitrite Reductase Activity.
Modifying the Steric Properties in the Second Coordination Sphere of Designed Peptides Leads to Enhancement of Nitrite Reductase Activity.
复制标题
改变设计肽第二配位域的空间性质可增强亚硝酸还原酶活性。
DOI:
10.1002/anie.201712757
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发表时间:
2018-04-03
期刊:
影响因子:
--
通讯作者:
Pecoraro VL
中科院分区:
文献类型:
--
作者:
Koebke KJ;Yu F;Salerno E;Van Stappen C;Tebo AG;Penner-Hahn JE;Pecoraro VL
Protein design is a useful strategy to interrogate the protein structure-function relationship. We demonstrate using a highly modular 3-stranded Coiled Coil (TRI-peptide system) that a functional type 2 copper center exhibiting copper nitrite reductase (NiR) activity exhibits the highest homogeneous catalytic efficiency under aqueous conditions for the reduction of nitrite to NO and H2O. Modification of the amino acids in the second coordination sphere of the copper center increases the nitrite reductase activity up to 75-fold compared to previously reported systems. We find also that steric bulk can be used to enforce a three-coordinate CuI in a site, which tends toward two-coordination with decreased steric bulk. This study demonstrates the importance of the second coordination sphere environment both for controlling metal center ligation and enhancing the catalytic efficiency of metalloenzymes and their analogues. A significant increase in nitrite reductase activity is achieved by modification of sterics in the second coordination sphere of a type 2 copper center. We demonstrate that sterics can be harnessed to control metal coordination and reactivity in a TRI peptide scaffold.
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DOI:
10.1073/pnas.0806792105
发表时间:
2008-10-28
影响因子:
11.1
作者:
Peacock, Anna F. A.;Hemmingsen, Lars;Pecoraro, Vincent L.
通讯作者:
Pecoraro, Vincent L.
影响因子:
15
作者:
Roy, Anindya;Sommer, Dayn Joseph;Ghirlanda, Giovanna
通讯作者:
Ghirlanda, Giovanna
影响因子:
4.8
作者:
Wijma, Hein J.;Jeuken, Lars J. C.;Canters, Gerard W.
通讯作者:
Canters, Gerard W.
DOI:
10.1039/b818306f
发表时间:
2009-04-07
期刊:
Dalton transactions (Cambridge, England : 2003)
影响因子:
--
作者:
Peacock AF;Iranzo O;Pecoraro VL
通讯作者:
Pecoraro VL
影响因子:
15
作者:
Dieckmann, GR;McRorie, DK;Pecoraro, VL
通讯作者:
Pecoraro, VL