Distinct roles of cinnamate 4-hydroxylase genes in Populus.
Identifieur interne : 003E33 ( Main/Exploration ); précédent : 003E32; suivant : 003E34Distinct roles of cinnamate 4-hydroxylase genes in Populus.
Auteurs : Shanfa Lu [États-Unis] ; Yihua Zhou ; Laigeng Li ; Vincent L. ChiangSource :
- Plant & cell physiology [ 0032-0781 ] ; 2006.
Descripteurs français
- KwdFr :
- ADN des plantes (génétique), Données de séquences moléculaires (MeSH), Gènes de plante (génétique), Gènes de plante (physiologie), Isoenzymes (génétique), Isoenzymes (physiologie), Lignine (biosynthèse), Populus (enzymologie), Populus (génétique), RT-PCR (MeSH), Régulation de l'expression des gènes codant pour des enzymes (génétique), Régulation de l'expression des gènes végétaux (génétique), Trans-cinnamate 4-monooxygenase (génétique), Trans-cinnamate 4-monooxygenase (métabolisme).
- MESH :
- biosynthèse : Lignine.
- enzymologie : Populus.
- génétique : ADN des plantes, Gènes de plante, Isoenzymes, Populus, Régulation de l'expression des gènes codant pour des enzymes, Régulation de l'expression des gènes végétaux, Trans-cinnamate 4-monooxygenase.
- métabolisme : Trans-cinnamate 4-monooxygenase.
- physiologie : Gènes de plante, Isoenzymes.
- Données de séquences moléculaires, RT-PCR.
English descriptors
- KwdEn :
- DNA, Plant (genetics), Gene Expression Regulation, Enzymologic (genetics), Gene Expression Regulation, Plant (genetics), Genes, Plant (genetics), Genes, Plant (physiology), Isoenzymes (genetics), Isoenzymes (physiology), Lignin (biosynthesis), Molecular Sequence Data (MeSH), Populus (enzymology), Populus (genetics), Reverse Transcriptase Polymerase Chain Reaction (MeSH), Trans-Cinnamate 4-Monooxygenase (genetics), Trans-Cinnamate 4-Monooxygenase (metabolism).
- MESH :
- chemical , biosynthesis : Lignin.
- chemical , genetics : DNA, Plant, Isoenzymes, Trans-Cinnamate 4-Monooxygenase.
- enzymology : Populus.
- genetics : Gene Expression Regulation, Enzymologic, Gene Expression Regulation, Plant, Genes, Plant, Populus.
- chemical , metabolism : Trans-Cinnamate 4-Monooxygenase.
- physiology : Genes, Plant, Isoenzymes.
- Molecular Sequence Data, Reverse Transcriptase Polymerase Chain Reaction.
Abstract
Cinnamate 4-hydroxylase (C4H) catalyzes the conversion of cinnamate into 4-hydroxy-cinnamate, a key reaction of the phenylpropanoid pathway which leads to the biosynthesis of several secondary metabolites. C4H genes exist as a multigene family in various plant species. In order to understand the roles of individual C4H members, four C4H cDNAs (PtreC4H) were isolated from Populus tremuloides and three C4H loci (PtriC4H) were identified in the P. trichocarpa genome. The ability of Populus C4H isoforms to convert trans-cinnamate into p-coumaric acid was verified by the examination of yeast recombinant PtreC4H proteins. Populus C4H genes were expressed in various tissues, including developing xylem, phloem and epidermis; however, the expression patterns of individual members were different from each other. Sequential analysis of C4H promoters showed that the differential expression of C4H genes was associated with cis-acting regulatory elements such as box L, box P and H box, suggesting that the divergent C4H isoforms played distinct roles in the production of secondary metabolites. The involvement of specific C4H isoforms in the biosynthesis of guaiacyl and syringyl monolignols is discussed.
DOI: 10.1093/pcp/pcj063
PubMed: 16720648
Affiliations:
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C4H genes exist as a multigene family in various plant species. In order to understand the roles of individual C4H members, four C4H cDNAs (PtreC4H) were isolated from Populus tremuloides and three C4H loci (PtriC4H) were identified in the P. trichocarpa genome. The ability of Populus C4H isoforms to convert trans-cinnamate into p-coumaric acid was verified by the examination of yeast recombinant PtreC4H proteins. Populus C4H genes were expressed in various tissues, including developing xylem, phloem and epidermis; however, the expression patterns of individual members were different from each other. Sequential analysis of C4H promoters showed that the differential expression of C4H genes was associated with cis-acting regulatory elements such as box L, box P and H box, suggesting that the divergent C4H isoforms played distinct roles in the production of secondary metabolites. The involvement of specific C4H isoforms in the biosynthesis of guaiacyl and syringyl monolignols is discussed.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">16720648</PMID><DateCompleted><Year>2006</Year><Month>11</Month><Day>09</Day></DateCompleted><DateRevised><Year>2019</Year><Month>12</Month><Day>10</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0032-0781</ISSN><JournalIssue CitedMedium="Print"><Volume>47</Volume><Issue>7</Issue><PubDate><Year>2006</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Plant & cell physiology</Title><ISOAbbreviation>Plant Cell Physiol</ISOAbbreviation></Journal><ArticleTitle>Distinct roles of cinnamate 4-hydroxylase genes in Populus.</ArticleTitle><Pagination><MedlinePgn>905-14</MedlinePgn></Pagination><Abstract><AbstractText>Cinnamate 4-hydroxylase (C4H) catalyzes the conversion of cinnamate into 4-hydroxy-cinnamate, a key reaction of the phenylpropanoid pathway which leads to the biosynthesis of several secondary metabolites. C4H genes exist as a multigene family in various plant species. In order to understand the roles of individual C4H members, four C4H cDNAs (PtreC4H) were isolated from Populus tremuloides and three C4H loci (PtriC4H) were identified in the P. trichocarpa genome. The ability of Populus C4H isoforms to convert trans-cinnamate into p-coumaric acid was verified by the examination of yeast recombinant PtreC4H proteins. Populus C4H genes were expressed in various tissues, including developing xylem, phloem and epidermis; however, the expression patterns of individual members were different from each other. Sequential analysis of C4H promoters showed that the differential expression of C4H genes was associated with cis-acting regulatory elements such as box L, box P and H box, suggesting that the divergent C4H isoforms played distinct roles in the production of secondary metabolites. The involvement of specific C4H isoforms in the biosynthesis of guaiacyl and syringyl monolignols is discussed.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Lu</LastName><ForeName>Shanfa</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>Forest Biotechnology Group, Department of Forestry and Environmental Resources, College of Natural Resources, North Carolina State University, Raleigh, NC 27695-7247, USA. slu@unity.ncsu.edu</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zhou</LastName><ForeName>Yihua</ForeName><Initials>Y</Initials></Author><Author ValidYN="Y"><LastName>Li</LastName><ForeName>Laigeng</ForeName><Initials>L</Initials></Author><Author ValidYN="Y"><LastName>Chiang</LastName><ForeName>Vincent L</ForeName><Initials>VL</Initials></Author></AuthorList><Language>eng</Language><DataBankList 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Chiang</name><name sortKey="Li, Laigeng" sort="Li, Laigeng" uniqKey="Li L" first="Laigeng" last="Li">Laigeng Li</name><name sortKey="Zhou, Yihua" sort="Zhou, Yihua" uniqKey="Zhou Y" first="Yihua" last="Zhou">Yihua Zhou</name></noCountry><country name="États-Unis"><region name="Caroline du Nord"><name sortKey="Lu, Shanfa" sort="Lu, Shanfa" uniqKey="Lu S" first="Shanfa" last="Lu">Shanfa Lu</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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