La maladie de Parkinson en France (serveur d'exploration)

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4-Hydroxyphenylpyruvate Dioxygenase Catalysis

Identifieur interne : 001628 ( Main/Exploration ); précédent : 001627; suivant : 001629

4-Hydroxyphenylpyruvate Dioxygenase Catalysis

Auteurs : Corinne Raspail [France] ; Matthieu Graindorge [France] ; Yohann Moreau ; Serge Crouzy ; Bertrand Lefèbvre ; Adeline Y. Robin [France] ; Renaud Dumas [France] ; Michel Matringe [France]

Source :

RBID : PMC:3138293

English descriptors

Abstract

4-Hydroxyphenylpyruvate dioxygenase (HPPD) catalyzes the conversion of 4-hydroxyphenylpyruvate (HPP) into homogentisate. HPPD is the molecular target of very effective synthetic herbicides. HPPD inhibitors may also be useful in treating life-threatening tyrosinemia type I and are currently in trials for treatment of Parkinson disease. The reaction mechanism of this key enzyme in both plants and animals has not yet been fully elucidated. In this study, using site-directed mutagenesis supported by quantum mechanical/molecular mechanical theoretical calculations, we investigated the role of catalytic residues potentially interacting with the substrate/intermediates. These results highlight the following: (i) the central role of Gln-272, Gln-286, and Gln-358 in HPP binding and the first nucleophilic attack; (ii) the important movement of the aromatic ring of HPP during the reaction, and (iii) the key role played by Asn-261 and Ser-246 in C1 hydroxylation and the final ortho-rearrangement steps (numbering according to the Arabidopsis HPPD crystal structure 1SQD). Furthermore, this study reveals that the last step of the catalytic reaction, the 1,2 shift of the acetate side chain, which was believed to be unique to the HPPD activity, is also catalyzed by a structurally unrelated enzyme.


Url:
DOI: 10.1074/jbc.M111.227595
PubMed: 21613226
PubMed Central: 3138293


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

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<term>4-Hydroxyphenylpyruvate Dioxygenase (metabolism)</term>
<term>Biocatalysis</term>
<term>Catalytic Domain</term>
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<term>Delftia acidovorans (enzymology)</term>
<term>Homogentisic Acid (metabolism)</term>
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<term>4-Hydroxyphenylpyruvate Dioxygenase</term>
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<term>4-Hydroxyphenylpyruvate Dioxygenase</term>
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<term>4-Hydroxyphenylpyruvate Dioxygenase</term>
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<term>4-hydroxyphenylpyruvate dioxygenase</term>
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<term>catalytic mechanism</term>
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<p>4-Hydroxyphenylpyruvate dioxygenase (HPPD) catalyzes the conversion of 4-hydroxyphenylpyruvate (HPP) into homogentisate. HPPD is the molecular target of very effective synthetic herbicides. HPPD inhibitors may also be useful in treating life-threatening tyrosinemia type I and are currently in trials for treatment of Parkinson disease. The reaction mechanism of this key enzyme in both plants and animals has not yet been fully elucidated. In this study, using site-directed mutagenesis supported by quantum mechanical/molecular mechanical theoretical calculations, we investigated the role of catalytic residues potentially interacting with the substrate/intermediates. These results highlight the following: (i) the central role of Gln-272, Gln-286, and Gln-358 in HPP binding and the first nucleophilic attack; (ii) the important movement of the aromatic ring of HPP during the reaction, and (iii) the key role played by Asn-261 and Ser-246 in C1 hydroxylation and the final ortho-rearrangement steps (numbering according to the
<italic>Arabidopsis</italic>
HPPD crystal structure 1SQD). Furthermore, this study reveals that the last step of the catalytic reaction, the 1,2 shift of the acetate side chain, which was believed to be unique to the HPPD activity, is also catalyzed by a structurally unrelated enzyme.</p>
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<name sortKey="Graindorge, Matthieu" sort="Graindorge, Matthieu" uniqKey="Graindorge M" first="Matthieu" last="Graindorge">Matthieu Graindorge</name>
<name sortKey="Matringe, Michel" sort="Matringe, Michel" uniqKey="Matringe M" first="Michel" last="Matringe">Michel Matringe</name>
<name sortKey="Robin, Adeline Y" sort="Robin, Adeline Y" uniqKey="Robin A" first="Adeline Y." last="Robin">Adeline Y. Robin</name>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Sante/explor/ParkinsonFranceV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001628 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001628 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Sante
   |area=    ParkinsonFranceV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     PMC:3138293
   |texte=   4-Hydroxyphenylpyruvate Dioxygenase Catalysis
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:21613226" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a ParkinsonFranceV1 

Wicri

This area was generated with Dilib version V0.6.29.
Data generation: Wed May 17 19:46:39 2017. Site generation: Mon Mar 4 15:48:15 2024