The effect on structural and solvent water molecules of substrate binding to ferric horseradish peroxidase.
The effect on structural and solvent water molecules of substrate binding to ferric horseradish peroxidase.
复制标题
对与辣根铁过氧化物酶结合的底物的结构和溶剂水分子的影响。
DOI:
10.1039/c4fd00161c
复制
发表时间:
2015
影响因子:
3.4
通讯作者:
Simpson N
中科院分区:
文献类型:
--
作者:
Simpson N
Ultrafast, multi-dimensional infrared spectroscopy, in the form of 2D-IR and pump–probe measurements, has been employed to investigate the effect of substrate binding on the structural dynamics of the horseradish peroxidase (HRP) enzyme. Using nitric oxide bound to the ferric haem of HRP as a sensitive probe of local dynamics, we report measurements of the frequency fluctuations (spectral diffusion) and vibrational lifetime of the NO stretching mode with benzohydroxamic acid (BHA) located in the substrate-binding position at the periphery of the haem pocket, in both D2O and H2O solvents. The results reveal that, with BHA bound to the enzyme, the local structural dynamics are insensitive to H/D exchange. These results are in stark contrast to those found in studies of the substrate-free enzyme, which demonstrated that the local chemical and dynamic environment of the haem ligand is influenced by water molecules. In light of the large changes in solvent accessibility caused by substrate binding, we discuss the potential for varying roles for the solvent in the haem pocket of HRP at different stages along the reaction coordinate of the enzymatic mechanism.
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DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
H. K. Baek;H. E. Wart
通讯作者:
H. E. Wart
影响因子:
3.3
作者:
B. Zelent;A. Kaposi;Nathaniel V Nucci;K. Sharp;S. Dalosto;W. W. Wright-W.;J. Vanderkooi
通讯作者:
B. Zelent;A. Kaposi;Nathaniel V Nucci;K. Sharp;S. Dalosto;W. W. Wright-W.;J. Vanderkooi
DOI:
10.1042/bj3630571
发表时间:
2002
期刊:
The Biochemical journal
影响因子:
--
作者:
H. Heering;Andrew T. Smith;G. Smulevich
通讯作者:
G. Smulevich
影响因子:
15
作者:
Thielges MC;Chung JK;Fayer MD
通讯作者:
Fayer MD
影响因子:
8.4
作者:
Adamczyk K;Simpson N;Greetham GM;Gumiero A;Walsh MA;Towrie M;Parker AW;Hunt NT
通讯作者:
Hunt NT