Acetylacetonato-lanthanide complexes as eminent catalytic sites for artificial ribonucleases.
Identifieur interne : 002E67 ( Main/Exploration ); précédent : 002E66; suivant : 002E68Acetylacetonato-lanthanide complexes as eminent catalytic sites for artificial ribonucleases.
Auteurs : J. Sumaoka [Japon] ; H. Uchida ; M. KomiyamaSource :
- Nucleic acids symposium series [ 0261-3166 ] ; 1995.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Dinucleoside Phosphates, Metals, Rare Earth, Organometallic Compounds, Ribonucleases.
- Binding Sites, Catalysis, Hydrolysis, Kinetics.
Abstract
Acetylacetonato complexes of lutetium, ytterbium, thulium, and europium ions efficiently hydrolyze the phosphodiester linkage in adenylyl(3'-5')adenosine. The pseudo first-order rate constant (3.2 x 10(-2) h-1) at pH 7.2 and 30 degrees C for the 1:1 lutetium-acetylacetonato complex (0.5 mmol dm-3) is close to the value (3.5 x 10(-2) h-1) for free lutetium ion of the same concentration. Potentialities of these complexes as the catalytic sites of artificial ribonucleases are indicated.
PubMed: 8841563
Affiliations:
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Sumaoka</name><affiliation wicri:level="1"><nlm:affiliation>Department of Chemistry and Biotechnology, Graduate School of Engineering University of Tokyo, Japan.</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>Department of Chemistry and Biotechnology, Graduate School of Engineering University of Tokyo</wicri:regionArea><wicri:noRegion>Graduate School of Engineering University of Tokyo</wicri:noRegion></affiliation></author><author><name sortKey="Uchida, H" sort="Uchida, H" uniqKey="Uchida H" first="H" last="Uchida">H. Uchida</name></author><author><name sortKey="Komiyama, M" sort="Komiyama, M" uniqKey="Komiyama M" first="M" last="Komiyama">M. Komiyama</name></author></analytic><series><title level="j">Nucleic acids symposium series</title><idno type="ISSN">0261-3166</idno><imprint><date when="1995" type="published">1995</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Binding Sites</term><term>Catalysis</term><term>Dinucleoside Phosphates (chemistry)</term><term>Hydrolysis</term><term>Kinetics</term><term>Metals, Rare Earth (chemistry)</term><term>Organometallic Compounds (chemistry)</term><term>Ribonucleases (chemistry)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Catalyse</term><term>Cinétique</term><term>Composés organométalliques ()</term><term>Dinucléoside phosphates ()</term><term>Hydrolyse</term><term>Ribonucléases ()</term><term>Sites de fixation</term><term>Terres rares ()</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Dinucleoside Phosphates</term><term>Metals, Rare Earth</term><term>Organometallic Compounds</term><term>Ribonucleases</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Binding Sites</term><term>Catalysis</term><term>Hydrolysis</term><term>Kinetics</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Catalyse</term><term>Cinétique</term><term>Composés organométalliques</term><term>Dinucléoside phosphates</term><term>Hydrolyse</term><term>Ribonucléases</term><term>Sites de fixation</term><term>Terres rares</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Acetylacetonato complexes of lutetium, ytterbium, thulium, and europium ions efficiently hydrolyze the phosphodiester linkage in adenylyl(3'-5')adenosine. The pseudo first-order rate constant (3.2 x 10(-2) h-1) at pH 7.2 and 30 degrees C for the 1:1 lutetium-acetylacetonato complex (0.5 mmol dm-3) is close to the value (3.5 x 10(-2) h-1) for free lutetium ion of the same concentration. Potentialities of these complexes as the catalytic sites of artificial ribonucleases are indicated.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><noCountry><name sortKey="Komiyama, M" sort="Komiyama, M" uniqKey="Komiyama M" first="M" last="Komiyama">M. Komiyama</name><name sortKey="Uchida, H" sort="Uchida, H" uniqKey="Uchida H" first="H" last="Uchida">H. Uchida</name></noCountry><country name="Japon"><noRegion><name sortKey="Sumaoka, J" sort="Sumaoka, J" uniqKey="Sumaoka J" first="J" last="Sumaoka">J. Sumaoka</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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