Crystallographic and solution studies of NAD+- and NADH-bound alkylhydroperoxide reductase subunit F (AhpF) from Escherichia coli provide insight into sequential enzymatic steps
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منابع مشابه
Structure, mechanism and ensemble formation of the alkylhydroperoxide reductase subunits AhpC and AhpF from Escherichia coli.
Hydroperoxides are reactive oxygen species (ROS) that are toxic to all cells and must be converted into the corresponding alcohols to alleviate oxidative stress. In Escherichia coli, the enzyme primarily responsible for this reaction is alkylhydroperoxide reductase (AhpR). Here, the crystal structures of both of the subunits of EcAhpR, EcAhpF (57 kDa) and EcAhpC (21 kDa), have been solved. The ...
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E. coli flavohemoglobin, oriented at electrodes via amphiphilic polymyxin B, electrocatalytically interconverts NADH and NAD(+) at its heme potentials operating as an electron transfer relay between the electrode and the protein FAD, where NADH/NAD(+) is transformed. The results are crucial for the development of NAD(+)-dependent bioelectrodes for biosynthesis, biosensors and biofuel cells.
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The NADH-dependent nitrite reductase of Escherichia coli, which contains sirohaem, flavin, non-haem iron and labile sulphide, was examined by low-temperature e.s.r. spectroscopy. The enzyme, stored in the presence of nitrite and ascorbate, gave the spectrum of a nitrosyl derivative, with hyperfine splitting due to the nitrosyl nitrogen. On removal of these reagents, a series of signals centred ...
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A unique form of inhibition by NADH and partial reversal by NAD+ has been demonstrated with Escherichia coli lipoamide dehydrogenase. Substrate inhibition by NADH is consistent with its reduction of the active two-electron reduced enzyme intermediate to the inactive four-electron reduced form. NAD+ partially overcomes this inhibition by mass action reversal of this reduction. NAD+ activation is...
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1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
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ژورنال
عنوان ژورنال: Biochimica et Biophysica Acta (BBA) - Bioenergetics
سال: 2015
ISSN: 0005-2728
DOI: 10.1016/j.bbabio.2015.06.011