A New Redox Cofactor in Eukaryotic Enzymes: 6-Hydroxydopa at the Active Site of Bovine Serum Amine Oxidase

An active site, cofactor-containing peptide has been obtained in high yield from bovine serum amine oxidase. Sequencing of this pentapeptide indicates: Leu-Asn-XAsp-Tyr. Analysis of the peptide by mass spectrometry, ultraviolet-visible spectroscopy, and proton nuclear magnetic resonance leads to the...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1990-05, Vol.248 (4958), p.981-987
Hauptverfasser: Janes, Susan M., Mu, David, Wemmer, David, Smith, Alan J., Kaur, Surinder, Maltby, David, Burlingame, Alma L., Klinman, Judith P.
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container_end_page 987
container_issue 4958
container_start_page 981
container_title Science (American Association for the Advancement of Science)
container_volume 248
creator Janes, Susan M.
Mu, David
Wemmer, David
Smith, Alan J.
Kaur, Surinder
Maltby, David
Burlingame, Alma L.
Klinman, Judith P.
description An active site, cofactor-containing peptide has been obtained in high yield from bovine serum amine oxidase. Sequencing of this pentapeptide indicates: Leu-Asn-XAsp-Tyr. Analysis of the peptide by mass spectrometry, ultraviolet-visible spectroscopy, and proton nuclear magnetic resonance leads to the identification of X as 6hydroxydopa. This result indicates that, contrary to previous proposals, pyrroloquinoline quinone is not the active site cofactor in mammalian copper amine oxidases. Although 6-hydroxydopa has been implicated in neurotoxicity, the data presented suggest that this compound has a functional role at an enzyme active site.
doi_str_mv 10.1126/science.2111581
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identifier ISSN: 0036-8075
ispartof Science (American Association for the Advancement of Science), 1990-05, Vol.248 (4958), p.981-987
issn 0036-8075
1095-9203
language eng
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source American Association for the Advancement of Science; Jstor Complete Legacy; MEDLINE
subjects Active sites
Amine Oxidase (Copper-Containing)
Amines
Amino Acid Sequence
Analysis
Analytical, structural and metabolic biochemistry
Animals
Binding Sites
Biochemistry
Biological and medical sciences
Cattle
Cells
Cells (Biology)
Chemical research
Chemistry
Copper
Dihydroxyphenylalanine - analogs & derivatives
Dihydroxyphenylalanine - metabolism
Enzymes
Enzymes and enzyme inhibitors
Eukaryotes
Eukaryotic cells
Fundamental and applied biological sciences. Psychology
Hydrogen
Magnetic Resonance Spectroscopy
Mass Spectrometry
Mass spectroscopy
Molecular Sequence Data
Oxidases
Oxidoreductases
Oxidoreductases - metabolism
Oxidoreductases Acting on CH-NH Group Donors - blood
Oxidoreductases Acting on CH-NH Group Donors - metabolism
Peptide Fragments - analysis
Peptide Fragments - chemical synthesis
Peptides
Phenylhydrazines
Quinones
Quinones - metabolism
Research Article
Solvents
Spectrophotometry, Ultraviolet
Ungulates
title A New Redox Cofactor in Eukaryotic Enzymes: 6-Hydroxydopa at the Active Site of Bovine Serum Amine Oxidase
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