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URN: urn:nbn:de:kobv:517-opus-16777
URL: http://opus.kobv.de/ubp/volltexte/2008/1677/
Kort, C. A. D. de ;
Peter, Martin G. ;
Koopmanschap, A. B.
Binding and degradation of juvenile hormone III by haemolymph proteins of the Colorado potato beetle: a re-examination
Kurzfassung in Englisch
The haemolymph of the adult Colorado potato beetle, Lepinotarsa decemlineata Say, contains a high molecular weight (MW > 200,000) JH-III specific binding protein. The Kd value of the protein for racemic JH-III is 1.3 ± 0.2 × 10−7 M. It has a lower affinity for racemic JH-I and it does not bind JH-III-diol or JH-III-acid. The binding protein does discriminate between the enantiomers of synthetic, racemic JH-III as was determined by stereochemical anaysis of the bound and the free JH-III. Incubation of racemic JH-III with crude haemolymph results in preferential formation of (10S)-JH-III-acid, the unnatural configuration. The JH-esterase present in L. decemlineata haemolymph is not enantioselective. It is concluded that the most important function of the binding protein is that of a specific carrier, protecting the natural hormone against degradation by esterases. The carrier does not protect JH-I as efficiently as the lower homologue.
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Freie Schlagwörter (Englisch): |
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Juvenile hormone , Leptinotarsa decemlineata , JH-III-specific carrier protein , enantioselectivity |
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Institut 1: |
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Institut für Chemie |
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Institut 2: |
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Extern |
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DDC-Sachgruppe: |
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Biowissenschaften, Biologie |
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Dokumentart: |
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c Postprint |
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Schriftenreihe: |
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Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, ISSN 1866-8372 |
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Bandnummer: |
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paper 068 |
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Quelle: |
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Insect Biochemistry. - 13 (1983), 5, pp. 481 - 487. ISSN 0020-1790 |
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Sprache: |
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Englisch |
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Erstellungsjahr: |
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1983 |
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Publikationsdatum: |
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27.08.2008 |
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Bemerkung: |
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first published in: Insect Biochemistry. - 13 (1983), 5, pp. 481 - 487
ISSN 0020-1790 DOI 10.1016/0020-1790(83)90005-7
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Lizenz: |
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Keine Nutzungslizenz vergeben - es gilt das deutsche Urheberrecht
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