Double Histidine Based EPR Measurements at Physiological Temperatures Permit Site‐Specific Elucidation of Hidden Dynamics in Enzymes
Double Histidine Based EPR Measurements at Physiological Temperatures Permit Site‐Specific Elucidation of Hidden Dynamics in Enzymes
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生理温度下基于双组氨酸的 EPR 测量允许位点特定阐明酶中隐藏的动力学
DOI:
10.1002/ange.202009982
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发表时间:
2020
影响因子:
--
通讯作者:
Saxena, Sunil
中科院分区:
文献类型:
--
作者:
Singewald, Kevin;Bogetti, Xiaowei;Sinha, Kaustubh;Rule, Gordon S.;Saxena, Sunil
Protein dynamics is at the heart of all cellular processes. Here, we utilize the dHis‐CuIINTA label to obtain site‐specific information on dynamics for both an α‐helix and β‐sheet site of GB1, the immunoglobulin binding domain of protein G. Spectral features found in our CW‐EPR measurements were consistent with the overall rigid nature of GB1 and with predictions from molecular dynamics simulations. Using this information, we show the potential of this approach to elucidate the role of dynamics in substrate binding of a functionally necessary α‐helix in human glutathione transferase A1‐1 (hGSTA1‐1). We observe two dynamical modes for the helix. The addition of the inhibitor GS‐Met and GS‐Hex resulted in hGSTA1‐1 to favor the more rigid active state conformation, while the faster mode potentially aids the search for substrates. Together the results illustrate the remarkable potential of the dHis‐based labelling approach to measure site‐specific dynamics using room temperature lineshape analysis.
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影响因子:
2.9
作者:
Cunningham, Timothy F.;McGoff, Marshall S.;Saxena, Sunil
通讯作者:
Saxena, Sunil
影响因子:
--
作者:
V. Singh;Mykhailo Azarkh;Thomas E. Exner;Jörg S. Hartig;M. Drescher
通讯作者:
M. Drescher
影响因子:
16.6
作者:
Abdullin, Dinar;Florin, Nicole;Schiemann, Olav
通讯作者:
Schiemann, Olav
影响因子:
--
作者:
Vijay R. Singh;M. Azarkh;T. Exner;J. Hartig;M. Drescher
通讯作者:
Vijay R. Singh;M. Azarkh;T. Exner;J. Hartig;M. Drescher
DOI:
10.1002/prot.340060312
发表时间:
1989
期刊:
Proteins: Structure
影响因子:
--
作者:
A. Todd;Jianping Cong;F. Levinthal;C. Levinthal;Wayne L. Hubell
通讯作者:
Wayne L. Hubell