Reduction of human defensin 5 affords a high-affinity zinc-chelating peptide.
Reduction of human defensin 5 affords a high-affinity zinc-chelating peptide.
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减少人防御素5提供了高亲和力的锌螯合肽。
DOI:
10.1021/cb400340k
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发表时间:
2013-09-20
影响因子:
4
通讯作者:
Nolan, Elizabeth M.
中科院分区:
文献类型:
--
作者:
Zhang, Yunfei;Cougnon, Fabien B. L.;Wanniarachchi, Yoshitha A.;Hayden, Joshua A.;Nolan, Elizabeth M.
Human defensin 5 (HD5) is a 32-residue cysteine-rich host-defense peptide that exhibits three disulfide bonds in the oxidized form (HD5ox). It is abundant in small intestinal Paneth cells, which release HD5 into the intestinal lumen and house a labile Zn(II) store of unknown function. Here we consider the redox properties of HD5 and report that the reduced form, HD5red, is a metal-ion chelator. HD5 has a midpoint potential of −257 mV at pH 7.0. HD5red utilizes its cysteine residues to coordinate one equivalent of Zn(II) with an apparent Kd1 value in the mid-picomolar range. Zn(II) or Cd(II) binding perturbs the oxidative folding pathway of HD5red to HD5ox. Whereas HD5red is highly susceptible to proteolytic degradation, the Zn(II)-bound form displays resistance to hydrolytic breakdown by trypsin and other proteases. The ability of a reduced defensin peptide to coordinate Zn(II) provides a putative mechanism for how these peptides persist in vivo.
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影响因子:
2.9
作者:
Wanniarachchi, Yoshitha A.;Kaczmarek, Piotr;Wan, Andrea;Nolan, Elizabeth M.
通讯作者:
Nolan, Elizabeth M.
影响因子:
4.8
作者:
Rajabi, Mohsen;de Leeuw, Erik;Lu, Wuyuan
通讯作者:
Lu, Wuyuan
影响因子:
2.9
作者:
VALLEE, BL;AULD, DS
通讯作者:
AULD, DS
影响因子:
64.8
作者:
Schroeder, Bjoern O.;Wu, Zhihong;Wehkamp, Jan
通讯作者:
Wehkamp, Jan
影响因子:
12.2
作者:
Schroeder, Bjoern O.;Stange, Eduard F.;Wehkamp, Jan
通讯作者:
Wehkamp, Jan