Deflavination and reconstitution of flavoproteins
نویسندگان
چکیده
منابع مشابه
EPR on Flavoproteins.
Flavoproteins often employ radical mechanisms in their enzymatic reactions. This involves paramagnetic species, which can ideally be investigated with electron paramagnetic resonance (EPR) spectroscopy. In this chapter we focus on the example of flavin-based photoreceptors and discuss, how different EPR methods have been used to extract information about the flavin radical's electronic state, i...
متن کاملActive-site probes of flavoproteins.
The chemical reactivity of 8-chloroflavins and 8-mercaptoflavins has been exploited in order to examine the orientation of protein-bound flavins relative to solvent. The apoprotein form of a series of flavoproteins was prepared and the native flavin was replaced by either 8-C1-flavin or 8-mercaptoflavin (FAD, FMN, or riboflavin form as was appropriate). The reconstituted proteins were exposed t...
متن کاملFluorescence properties of reduced flavins and flavoproteins.
Fluorescence lifetimes and polarized emission properties of reduced flavin were measured using several model compounds and flavoproteins. Depending on the conditions of solvent and temperature or reduction method the lifetimes vary between 1 and 15 ns. The longer lifetime values are found in several forms of reduced lactate oxidase, in which a good correlation exists between fluorescence intens...
متن کاملVertebrate Cryptochromes are Vestigial Flavoproteins
All cryptochromes are currently classified as flavoproteins. In animals their best-described role is as components of the circadian clock. This circadian function is variable, and can be either light-dependent or -independent; the molecular origin of this difference is unknown. Type I animal cryptochromes are photoreceptors that entrain an organism's clock to its environment, whereas Type II (i...
متن کامل8-Azidoflavins as photoaffinity labels for flavoproteins.
8-Azidoflavins have been synthesized and their potential as photoaffinity labels for flavoproteins has been explored. They are very photolabile, and in aqueous media they react with solvent to yield 8-aminoflavins and 8-hydroxlaminoflavins as the main products. They fulfill the criteria expected of a good photoaffinity label, since they bind stoichiometrically at the flavin-binding site of flav...
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ژورنال
عنوان ژورنال: European Journal of Biochemistry
سال: 2003
ISSN: 0014-2956,1432-1033
DOI: 10.1046/j.1432-1033.2003.03802.x