Inert site in a protein zinc cluster: Isotope exchange by high resolution mass spectrometry

Inert site in a protein zinc cluster: Isotope exchange by high resolution mass spectrometry
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DOI:
10.1021/ja0284409
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发表时间:
2003-03-19
影响因子:
15
通讯作者:
Sadler, PJ
Sadler, PJ
中科院分区:
化学1区
文献类型:
--
作者:
Blindauer, CA;Polfer, NC;Sadler, PJ

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利用电喷雾电离傅里叶变换离子回旋共振质谱(ESPI-FTIR-ICP-MS),我们发现蓝藻金属硫蛋白Zn 4簇中的一个Zn 2+离子对67个Zn 2+离子的交换是惰性的。我们认为这是A位的锌,它与周围的α和β二级结构一起形成锌指折叠。
Using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry, we show that one Zn2+ion in the Zn4cluster of cyanobacterial metallothionein is inert to exchange with67Zn2+. We suggest that this is zinc in site A, which together with the surrounding α and β secondary structure forms a zinc-finger fold.