Characterization of a salt-independent pectin methylesterase purified from valencia orange peel.
Identifieur interne : 000053 ( Ncbi/Curation ); précédent : 000052; suivant : 000054Characterization of a salt-independent pectin methylesterase purified from valencia orange peel.
Auteurs : Brett J. Savary [États-Unis] ; Arland T. Hotchkiss ; Randall G. CameronSource :
- Journal of agricultural and food chemistry [ 0021-8561 ] ; 2002.
English descriptors
- KwdEn :
- Amino Acid Sequence, Carboxylic Ester Hydrolases (chemistry), Carboxylic Ester Hydrolases (isolation & purification), Carboxylic Ester Hydrolases (metabolism), Chromatography, Citrus (enzymology), Electrophoresis, Polyacrylamide Gel, Hydrogen-Ion Concentration, Isoenzymes (chemistry), Isoenzymes (isolation & purification), Isoenzymes (metabolism), Molecular Sequence Data, Sequence Alignment.
- MESH :
- chemical , chemistry : Carboxylic Ester Hydrolases, Isoenzymes.
- chemical , isolation & purification : Carboxylic Ester Hydrolases, Isoenzymes.
- chemical , metabolism : Carboxylic Ester Hydrolases, Isoenzymes.
- enzymology : Citrus.
- Amino Acid Sequence, Chromatography, Electrophoresis, Polyacrylamide Gel, Hydrogen-Ion Concentration, Molecular Sequence Data, Sequence Alignment.
Abstract
The pectin methylesterase (PME; EC 3.1.1.11) present in a commercial orange peel enzyme preparation was characterized to establish its identity among the multiple PME isozymes present in Valencia orange (Citrus sinensis L.) peel. We show the commercial enzyme corresponds to the major peak 2 PME previously separated by heparin-Sepharose chromatography (Cameron et al., J. Food Sci. 1998, 63, 253). Both PMEs have comparable elution profiles on cation-exchange and hydrophobic-interaction perfusion chromatography columns, molecular weights (ca. 34 kDa) and pI (pH 9.2), and biochemical properties, including a broad pH activity range and activity in the absence of added cations. An identical partial amino terminal peptide sequence was also obtained for the PMEs, which further demonstrated a structural identity with other plant PMEs. The biochemical and structural properties readily distinguish this Valencia orange PME from salt-dependent isozymes and further suggest that it is an ortholog to the salt-independent fruit-specific isozyme of tomato. This work provides a well-defined, enzymatically homogeneous, salt-independent (type 1) plant PME isozyme that is suitable for studying details of the enzyme's mode of action and for use in modifying methylester patterns for studying the structure-functional property relationships in pectin.
PubMed: 12033828
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pubmed:12033828Le document en format XML
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Hotchkiss</name></author><author><name sortKey="Cameron, Randall G" sort="Cameron, Randall G" uniqKey="Cameron R" first="Randall G" last="Cameron">Randall G. Cameron</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2002">2002</date><idno type="RBID">pubmed:12033828</idno><idno type="pmid">12033828</idno><idno type="wicri:Area/PubMed/Corpus">000E76</idno><idno type="wicri:Area/PubMed/Curation">000E76</idno><idno type="wicri:Area/PubMed/Checkpoint">000E76</idno><idno type="wicri:Area/Ncbi/Merge">000053</idno><idno type="wicri:Area/Ncbi/Curation">000053</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Characterization of a salt-independent pectin methylesterase purified from valencia orange peel.</title><author><name sortKey="Savary, Brett J" sort="Savary, Brett J" uniqKey="Savary B" first="Brett J" last="Savary">Brett J. Savary</name><affiliation wicri:level="1"><nlm:affiliation>Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038-8551, USA. bsavary@arserrc.gov</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038-8551</wicri:regionArea><wicri:noRegion>Pennsylvania 19038-8551</wicri:noRegion></affiliation></author><author><name sortKey="Hotchkiss, Arland T" sort="Hotchkiss, Arland T" uniqKey="Hotchkiss A" first="Arland T" last="Hotchkiss">Arland T. Hotchkiss</name></author><author><name sortKey="Cameron, Randall G" sort="Cameron, Randall G" uniqKey="Cameron R" first="Randall G" last="Cameron">Randall G. Cameron</name></author></analytic><series><title level="j">Journal of agricultural and food chemistry</title><idno type="ISSN">0021-8561</idno><imprint><date when="2002" type="published">2002</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Amino Acid Sequence</term><term>Carboxylic Ester Hydrolases (chemistry)</term><term>Carboxylic Ester Hydrolases (isolation & purification)</term><term>Carboxylic Ester Hydrolases (metabolism)</term><term>Chromatography</term><term>Citrus (enzymology)</term><term>Electrophoresis, Polyacrylamide Gel</term><term>Hydrogen-Ion Concentration</term><term>Isoenzymes (chemistry)</term><term>Isoenzymes (isolation & purification)</term><term>Isoenzymes (metabolism)</term><term>Molecular Sequence Data</term><term>Sequence Alignment</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Carboxylic Ester Hydrolases</term><term>Isoenzymes</term></keywords><keywords scheme="MESH" type="chemical" qualifier="isolation & purification" xml:lang="en"><term>Carboxylic Ester Hydrolases</term><term>Isoenzymes</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carboxylic Ester Hydrolases</term><term>Isoenzymes</term></keywords><keywords scheme="MESH" qualifier="enzymology" xml:lang="en"><term>Citrus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Amino Acid Sequence</term><term>Chromatography</term><term>Electrophoresis, Polyacrylamide Gel</term><term>Hydrogen-Ion Concentration</term><term>Molecular Sequence Data</term><term>Sequence Alignment</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The pectin methylesterase (PME; EC 3.1.1.11) present in a commercial orange peel enzyme preparation was characterized to establish its identity among the multiple PME isozymes present in Valencia orange (Citrus sinensis L.) peel. We show the commercial enzyme corresponds to the major peak 2 PME previously separated by heparin-Sepharose chromatography (Cameron et al., J. Food Sci. 1998, 63, 253). Both PMEs have comparable elution profiles on cation-exchange and hydrophobic-interaction perfusion chromatography columns, molecular weights (ca. 34 kDa) and pI (pH 9.2), and biochemical properties, including a broad pH activity range and activity in the absence of added cations. An identical partial amino terminal peptide sequence was also obtained for the PMEs, which further demonstrated a structural identity with other plant PMEs. The biochemical and structural properties readily distinguish this Valencia orange PME from salt-dependent isozymes and further suggest that it is an ortholog to the salt-independent fruit-specific isozyme of tomato. This work provides a well-defined, enzymatically homogeneous, salt-independent (type 1) plant PME isozyme that is suitable for studying details of the enzyme's mode of action and for use in modifying methylester patterns for studying the structure-functional property relationships in pectin.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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