Electroanalytical determination of tungsten and molybdenum in proteins

P.L. Hagedoorn, P. van 't Slot, H.P. van Leeuwen, W.R. Hagen

Research output: Contribution to journalArticleAcademicpeer-review

17 Citations (Scopus)

Abstract

Recent crystal structure determinations accelerated the progress in the biochemistry of tungsten-containing enzymes. In order to characterize these enzymes, a sensitive determination of this metal in protein-containing samples is necessary. An electroanalytical tungsten determination has successfully been adapted to determine the tungsten and molybdenum content in enzymes. The tungsten and molybdenum content can be measured simultaneously from 1 to 10 g of purified protein with little or no sample handling. More crude protein samples require precipitation of interfering surface active material with 10 erchloric acid. This method affords the isolation of novel molybdenum- and tungsten-containing proteins via molybdenum and tungsten monitoring of column fractions, without using radioactive isotopes. A screening of soluble proteins from Pyrococcus furiosus for tungsten, using anion-exchange column chromatography to separate the proteins, has been performed. The three known tungsten-containing enzymes from P. furiosus were recovered with this screening
Original languageEnglish
Pages (from-to)71-78
JournalAnalytical Biochemistry
Volume297
DOIs
Publication statusPublished - 2001

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