X-ray spectroscopic observation of an interstitial carbide in NifEN-bound FeMoco precursor.
X-ray spectroscopic observation of an interstitial carbide in NifEN-bound FeMoco precursor.
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DOI:
10.1021/ja309254g
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发表时间:
2013-01-16
影响因子:
15
通讯作者:
DeBeer, Serena
中科院分区:
文献类型:
--
作者:
Lancaster, Kyle M.;Hu, Yilin;Bergmann, Uwe;Ribbe, Markus W.;DeBeer, Serena
The iron-molybdenum cofactor (FeMoco) of nitrogenase contains a biologically unprecedented μ6-coordinated C4− ion. Although the role of this interstitial atom in nitrogenase catalysis is unknown, progress has been made on understanding its biosynthetic origins. Here, we report valence-to-core (V2C) Fe Kβ X-ray emission spectroscopy (XES) to show that this C4− ion is present in the Fe8S9 “L-cluster,” which is the immediate precursor to FeMoco prior to the insertion of molybdenum and coordination by homocitrate. These results accord with recent evidence supporting a role for the S-adenosylmethionine (SAM)-dependent enzyme NifB in the incorporation of carbon into the FeMoco center of nitrogenase.
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DOI:
10.1126/science.1224603
发表时间:
2012-09-28
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Wiig JA;Hu Y;Chung Lee C;Ribbe MW
通讯作者:
Ribbe MW
影响因子:
15
作者:
Pollock, Christopher J.;DeBeer, Serena
通讯作者:
DeBeer, Serena
影响因子:
15
作者:
George, Simon J.;Igarashi, Robert Y.;Cramer, Stephen P.
通讯作者:
Cramer, Stephen P.
DOI:
10.1073/pnas.0601115103
发表时间:
2006-04-04
影响因子:
11.1
作者:
Curatti, L;Ludden, PW;Rubio, LM
通讯作者:
Rubio, LM
影响因子:
4.6
作者:
Delgado-Jaime MU;Dible BR;Chiang KP;Brennessel WW;Bergmann U;Holland PL;DeBeer S
通讯作者:
DeBeer S