Characterization of cholesterol oxidase from Streptomyces hygroscopicus and Brevibacterium sterolicum

Lade...
Vorschaubild
Dateien
Zu diesem Dokument gibt es keine Dateien.
Datum
1997
Autor:innen
Gadda, Giovanni
Wels, Gaby
Pollegioni, Loredano
Zucchelli, Silvia
Ambrosius, Dorothea
Pilone, Mirella S.
Herausgeber:innen
Kontakt
ISSN der Zeitschrift
Electronic ISSN
ISBN
Bibliografische Daten
Verlag
Schriftenreihe
Auflagebezeichnung
ArXiv-ID
Internationale Patentnummer
Angaben zur Forschungsförderung
Projekt
Cholesterol Oxidase
Open Access-Veröffentlichung
Open Access Green
Sammlungen
Core Facility der Universität Konstanz
Gesperrt bis
Titel in einer weiteren Sprache
Forschungsvorhaben
Organisationseinheiten
Zeitschriftenheft
Publikationstyp
Zeitschriftenartikel
Publikationsstatus
Published
Erschienen in
European Journal of Biochemistry. 1997, 250(2), pp. 369-376. ISSN 0014-2956. eISSN 1432-1033. Available under: doi: 10.1111/j.1432-1033.1997.0369a.x
Zusammenfassung

The FAD-containing enzyme cholesterol oxidase catalyzes the oxidation and isomerization of 3β-hydroxysteroids having a trans double bond at Δ5-Δ6 of the steroid ring backbone to the corresponding Δ4-3-ketosteroid. Two representative enzymes of this family, namely cholesterol oxidase from Streptomyces hygroscopicus (SCO) and the recombinant enzyme from Brevibacterium sterolicum (BCO) expressed in Escherichia coli, have been characterized herein in their chemical, physical, and biochemical properties. In the native form, both enzymes are monomeric (55 kDa), acidic (pI 4.4 5.1) and contain oxidized FAD (peaks in the 370 390-nm and 440 470-nm regions). Marked differences exist between the oxidized, reduced, and (red) anion semiquinone spectra of the two enzymes, suggesting substantial differences in the flavin microenvironment. Both enzymes form reversibly flavin N(5)-sulfite adducts via measurable kon and koff steps. BCO has a higher affinity for sulfite (Kd≈ 0.14 mM) compared to SCO (≈24 mM). This correlates well with the midpoint redox potentials of the bound flavin, which in the case of BCO are about 100 mV more positive than for SCO. Both enzymes show a high pKa (≈11.0) for the N(3) position of FAD. With both enzymes, the rearrangement of 5-cholesten-3-one to 4-cholesten-3-one is not rate limiting indicating that the rate-limiting step of the overall reaction is not the isomerization. The absence of the double bond in the steroid molecule does not significantly affect turnover and affinity for the substrate, whereas both these parameters are affected by a decreasing length of the substrate C17 chain.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
570 Biowissenschaften, Biologie
Schlagwörter
cholesterol oxidase, flavoenzyme, catalytic property, redox potential
Konferenz
Rezension
undefined / . - undefined, undefined
Zitieren
ISO 690GADDA, Giovanni, Gaby WELS, Loredano POLLEGIONI, Silvia ZUCCHELLI, Dorothea AMBROSIUS, Mirella S. PILONE, Sandro GHISLA, 1997. Characterization of cholesterol oxidase from Streptomyces hygroscopicus and Brevibacterium sterolicum. In: European Journal of Biochemistry. 1997, 250(2), pp. 369-376. ISSN 0014-2956. eISSN 1432-1033. Available under: doi: 10.1111/j.1432-1033.1997.0369a.x
BibTex
@article{Gadda1997Chara-6945,
  year={1997},
  doi={10.1111/j.1432-1033.1997.0369a.x},
  title={Characterization of cholesterol oxidase from Streptomyces hygroscopicus and Brevibacterium sterolicum},
  number={2},
  volume={250},
  issn={0014-2956},
  journal={European Journal of Biochemistry},
  pages={369--376},
  author={Gadda, Giovanni and Wels, Gaby and Pollegioni, Loredano and Zucchelli, Silvia and Ambrosius, Dorothea and Pilone, Mirella S. and Ghisla, Sandro}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/6945">
    <dc:creator>Gadda, Giovanni</dc:creator>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dc:creator>Zucchelli, Silvia</dc:creator>
    <dc:format>application/pdf</dc:format>
    <dc:contributor>Wels, Gaby</dc:contributor>
    <dcterms:abstract xml:lang="eng">The FAD-containing enzyme cholesterol oxidase catalyzes the oxidation and isomerization of 3β-hydroxysteroids having a trans double bond at Δ5-Δ6 of the steroid ring backbone to the corresponding Δ4-3-ketosteroid. Two representative enzymes of this family, namely cholesterol oxidase from Streptomyces hygroscopicus (SCO) and the recombinant enzyme from Brevibacterium sterolicum (BCO) expressed in Escherichia coli, have been characterized herein in their chemical, physical, and biochemical properties. In the native form, both enzymes are monomeric (55 kDa), acidic (pI 4.4 5.1) and contain oxidized FAD (peaks in the 370 390-nm and 440 470-nm regions). Marked differences exist between the oxidized, reduced, and (red) anion semiquinone spectra of the two enzymes, suggesting substantial differences in the flavin microenvironment. Both enzymes form reversibly flavin N(5)-sulfite adducts via measurable kon and koff steps. BCO has a higher affinity for sulfite (Kd≈ 0.14 mM) compared to SCO (≈24 mM). This correlates well with the midpoint redox potentials of the bound flavin, which in the case of BCO are about 100 mV more positive than for SCO. Both enzymes show a high pKa (≈11.0) for the N(3) position of FAD. With both enzymes, the rearrangement of 5-cholesten-3-one to 4-cholesten-3-one is not rate limiting indicating that the rate-limiting step of the overall reaction is not the isomerization. The absence of the double bond in the steroid molecule does not significantly affect turnover and affinity for the substrate, whereas both these parameters are affected by a decreasing length of the substrate C17 chain.</dcterms:abstract>
    <dc:contributor>Ambrosius, Dorothea</dc:contributor>
    <dc:contributor>Pollegioni, Loredano</dc:contributor>
    <dc:creator>Pilone, Mirella S.</dc:creator>
    <dc:creator>Ghisla, Sandro</dc:creator>
    <dc:creator>Wels, Gaby</dc:creator>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/6945/1/Characterization_of_cholesterol_oxidase_from_Streptomyces_hygroscopicus_and_Brevibacterium_sterolicum.pdf"/>
    <dc:creator>Pollegioni, Loredano</dc:creator>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:30:20Z</dcterms:available>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/6945"/>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:30:20Z</dc:date>
    <dc:contributor>Pilone, Mirella S.</dc:contributor>
    <dc:creator>Ambrosius, Dorothea</dc:creator>
    <dcterms:rights rdf:resource="http://creativecommons.org/licenses/by-nc-nd/2.0/"/>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/6945/1/Characterization_of_cholesterol_oxidase_from_Streptomyces_hygroscopicus_and_Brevibacterium_sterolicum.pdf"/>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:contributor>Zucchelli, Silvia</dc:contributor>
    <dc:rights>Attribution-NonCommercial-NoDerivs 2.0 Generic</dc:rights>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dcterms:bibliographicCitation>First publ. in: European Journal of Biochemistry ; 250 (1997), 2. - S. 369-376</dcterms:bibliographicCitation>
    <dc:contributor>Gadda, Giovanni</dc:contributor>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dcterms:issued>1997</dcterms:issued>
    <dc:language>eng</dc:language>
    <dc:contributor>Ghisla, Sandro</dc:contributor>
    <dcterms:title>Characterization of cholesterol oxidase from Streptomyces hygroscopicus and Brevibacterium sterolicum</dcterms:title>
  </rdf:Description>
</rdf:RDF>
Interner Vermerk
xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter
Kontakt
URL der Originalveröffentl.
Prüfdatum der URL
Prüfungsdatum der Dissertation
Finanzierungsart
Kommentar zur Publikation
Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Nein
Begutachtet
Diese Publikation teilen