Weak Acid-Base Interactions of Histidine and Cysteine Affect the Charge States, Tertiary Structure, and Zn(II)-Binding of Heptapeptides
Weak Acid-Base Interactions of Histidine and Cysteine Affect the Charge States, Tertiary Structure, and Zn(II)-Binding of Heptapeptides
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组氨酸和半胱氨酸的弱酸碱相互作用影响七肽的电荷状态、三级结构和 Zn(II) 结合
DOI:
10.1007/s13361-019-02275-7
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发表时间:
2019
影响因子:
3.2
通讯作者:
Angel, Laurence A.
中科院分区:
文献类型:
--
作者:
Lin, Yu-Fu;Yousef, Enas N.;Torres, Efren;Truong, Linh;Zahnow, James M.;Donald, Cole B.;Qin, Ying;Angel, Laurence A.
Zinc fingers are proteins that are characterized by the coordination of zinc ions by an amino acid sequence that commonly contains two histidines and two cysteines (2His-2Cys motif). Investigations of oligopeptides that contain the 2His-2Cys motif, e.g., acetyl-His1-Cys2-Gly3-Pro4-Tyr5-His6-Cys7, have discovered they exhibit pH-dependent Zn(II) chelation and have redox activities with Cu(I/II), forming a variety of metal complexes. To further understand how these 2His-2Cys oligopeptides bind these metal ions, we have undertaken a series of ion mobility–mass spectrometry and B3LYP/LanL2DZ computational studies of structurally related heptapeptides. Starting with the sequence above, we have modified the potential His, Cys, or C-terminus binding sites and report how these changes in primary structure affect the oligopeptides positive and negative charge states, conformational structure, collision-induced breakdown energies, and how effectively Zn(II) binds to these sequences. The results show evidence that the weak acid-base properties of Cys-His are intrinsically linked and can result in an intramolecular salt-bridged network that affects the oligopeptide properties.
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DOI:
10.1007/s13361-017-1778-9
发表时间:
2017-08
影响因子:
3.2
作者:
J. McCabe;Rajpal Vangala;L. Angel
通讯作者:
J. McCabe;Rajpal Vangala;L. Angel
影响因子:
7.4
作者:
Elferich J;Williamson DM;David LL;Shinde U
通讯作者:
Shinde U
DOI:
10.1002/rcm.1360
发表时间:
2004
期刊:
Rapid communications in mass spectrometry : RCM
影响因子:
--
作者:
D. Bilusich;C. Brinkworth;J. Bowie
通讯作者:
J. Bowie
DOI:
10.1002/rcm.4003
发表时间:
2009
期刊:
Rapid communications in mass spectrometry : RCM
影响因子:
--
作者:
A. G. Harrison
通讯作者:
A. G. Harrison
影响因子:
3.2
作者:
S. S. Bokatzian‐Johnson;Michele L. Stover;D. Dixon;C. Cassady
通讯作者:
C. Cassady