Serveur d'exploration sur le phanerochaete

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Molecular characterization of lignin peroxidase from the white-rot basidiomycete Trametes cervina: a novel fungal peroxidase.

Identifieur interne : 000550 ( Main/Exploration ); précédent : 000549; suivant : 000551

Molecular characterization of lignin peroxidase from the white-rot basidiomycete Trametes cervina: a novel fungal peroxidase.

Auteurs : Yuta Miki [Japon] ; Hirofumi Ichinose ; Hiroyuki Wariishi

Source :

RBID : pubmed:20070371

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English descriptors

Abstract

The lignin peroxidase (LiP) from Trametes cervina was cloned, characterized, and identified as a novel fungal peroxidase. The sequence of T. cervina LiP encodes the essential amino acids for shaping the heme cavity and calcium-binding sites, which are conserved in plant and fungal peroxidases. However, a sequence homology analysis showed that T. cervina LiP has two unique features: it lacks the conserved tryptophan residue corresponding to the substrate-oxidation site (Trp171) of Phanerochaete chrysosporium LiP and it has a tyrosine residue (Tyr181) that has never been reported in other lignin peroxidases. A tertiary model of T. cervina LiP showed that Tyr181 sterically adjacent to the 6-propionate group of heme is surrounded by acidic amino acids and is exposed to the exterior. These attributes indicate that Tyr181 could be a T. cervina LiP substrate-oxidation site. A phylogenetic analysis showed that T. cervina LiP does not cluster with any other fungal peroxidases, suggesting that it is a unique molecule that is evolutionarily distant from other peroxidases. Thus, we concluded that T. cervina LiP could be a novel secreted peroxidase, among those produced by fungi, with a new oxidation mechanism probably involving Tyr181.

DOI: 10.1111/j.1574-6968.2009.01880.x
PubMed: 20070371


Affiliations:


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Le document en format XML

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<title xml:lang="en">Molecular characterization of lignin peroxidase from the white-rot basidiomycete Trametes cervina: a novel fungal peroxidase.</title>
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<name sortKey="Miki, Yuta" sort="Miki, Yuta" uniqKey="Miki Y" first="Yuta" last="Miki">Yuta Miki</name>
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<nlm:affiliation>Faculty of Agriculture, Kyushu University, Higashi-ku, Fukuoka, Japan.</nlm:affiliation>
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<name sortKey="Wariishi, Hiroyuki" sort="Wariishi, Hiroyuki" uniqKey="Wariishi H" first="Hiroyuki" last="Wariishi">Hiroyuki Wariishi</name>
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<term>Amino Acid Sequence (MeSH)</term>
<term>Fungal Proteins (chemistry)</term>
<term>Fungal Proteins (genetics)</term>
<term>Fungal Proteins (metabolism)</term>
<term>Models, Molecular (MeSH)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Oxidation-Reduction (MeSH)</term>
<term>Peroxidases (chemistry)</term>
<term>Peroxidases (genetics)</term>
<term>Peroxidases (metabolism)</term>
<term>Sequence Analysis, DNA (MeSH)</term>
<term>Trametes (classification)</term>
<term>Trametes (enzymology)</term>
<term>Trametes (genetics)</term>
<term>Tryptophan (chemistry)</term>
<term>Tyrosine (chemistry)</term>
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<term>Analyse de séquence d'ADN (MeSH)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Modèles moléculaires (MeSH)</term>
<term>Oxydoréduction (MeSH)</term>
<term>Peroxidases (composition chimique)</term>
<term>Peroxidases (génétique)</term>
<term>Peroxidases (métabolisme)</term>
<term>Protéines fongiques (composition chimique)</term>
<term>Protéines fongiques (génétique)</term>
<term>Protéines fongiques (métabolisme)</term>
<term>Séquence d'acides aminés (MeSH)</term>
<term>Trametes (classification)</term>
<term>Trametes (enzymologie)</term>
<term>Trametes (génétique)</term>
<term>Tryptophane (composition chimique)</term>
<term>Tyrosine (composition chimique)</term>
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<term>Tyrosine</term>
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<term>Models, Molecular</term>
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<term>Sequence Analysis, DNA</term>
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<term>Données de séquences moléculaires</term>
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<div type="abstract" xml:lang="en">The lignin peroxidase (LiP) from Trametes cervina was cloned, characterized, and identified as a novel fungal peroxidase. The sequence of T. cervina LiP encodes the essential amino acids for shaping the heme cavity and calcium-binding sites, which are conserved in plant and fungal peroxidases. However, a sequence homology analysis showed that T. cervina LiP has two unique features: it lacks the conserved tryptophan residue corresponding to the substrate-oxidation site (Trp171) of Phanerochaete chrysosporium LiP and it has a tyrosine residue (Tyr181) that has never been reported in other lignin peroxidases. A tertiary model of T. cervina LiP showed that Tyr181 sterically adjacent to the 6-propionate group of heme is surrounded by acidic amino acids and is exposed to the exterior. These attributes indicate that Tyr181 could be a T. cervina LiP substrate-oxidation site. A phylogenetic analysis showed that T. cervina LiP does not cluster with any other fungal peroxidases, suggesting that it is a unique molecule that is evolutionarily distant from other peroxidases. Thus, we concluded that T. cervina LiP could be a novel secreted peroxidase, among those produced by fungi, with a new oxidation mechanism probably involving Tyr181.</div>
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