PoplarV1, Main, Exploration, bibRecord, 002C15

Acetylesterase-mediated deacetylation of pectin impairs cell elongation, pollen germination, and plant reproduction.

Identifieur interne : 002C15 ( Main/Exploration ); précédent : 002C14; suivant : 002C16

Acetylesterase-mediated deacetylation of pectin impairs cell elongation, pollen germination, and plant reproduction.

Auteurs : Jin-Ying Gou [États-Unis] ; Lisa M. Miller ; Guichuan Hou ; Xiao-Hong Yu ; Xiao-Ya Chen ; Chang-Jun Liu

Source :

The Plant cell [ 1532-298X ] ; 2012.

RBID : pubmed:22247250

Descripteurs français

KwdFr :
- Acetylesterase (classification), Acetylesterase (génétique), Acetylesterase (métabolisme), Acétylation (MeSH), Données de séquences moléculaires (MeSH), Pectine (métabolisme), Phylogenèse (MeSH), Pollen (physiologie), Populus (enzymologie), Populus (métabolisme), Populus (physiologie), Protéines végétales (classification), Protéines végétales (génétique), Protéines végétales (métabolisme), Reproduction (physiologie).
MESH :
- classification : Acetylesterase, Protéines végétales.
- enzymologie : Populus.
- génétique : Acetylesterase, Protéines végétales.
- métabolisme : Acetylesterase, Pectine, Populus, Protéines végétales.
- physiologie : Pollen, Populus, Reproduction.
- Acétylation, Données de séquences moléculaires, Phylogenèse.

English descriptors

KwdEn :
- Acetylation (MeSH), Acetylesterase (classification), Acetylesterase (genetics), Acetylesterase (metabolism), Molecular Sequence Data (MeSH), Pectins (metabolism), Phylogeny (MeSH), Plant Proteins (classification), Plant Proteins (genetics), Plant Proteins (metabolism), Pollen (physiology), Populus (enzymology), Populus (metabolism), Populus (physiology), Reproduction (physiology).
MESH :
- chemical , classification : Acetylesterase, Plant Proteins.
- chemical , genetics : Acetylesterase, Plant Proteins.
- chemical , metabolism : Acetylesterase, Pectins, Plant Proteins.
- enzymology : Populus.
- metabolism : Populus.
- physiology : Pollen, Populus, Reproduction.
- Acetylation, Molecular Sequence Data, Phylogeny.

Abstract

Pectin is a major component of the primary cell wall of higher plants. Some galacturonyl residues in the backbone of pectinaceous polysaccharides are often O-acetylated at the C-2 or C-3 position, and the resulting acetylesters change dynamically during the growth and development of plants. The processes involve both enzymatic acetylation and deacetylation. Through genomic sequence analysis, we identified a pectin acetylesterase (PAE1) from black cottonwood (Populus trichocarpa). Recombinant Pt PAE1 exhibited preferential activity in releasing the acetate moiety from sugar beet (Beta vulgaris) and potato (Solanum tuberosum) pectin in vitro. Overexpressing Pt PAE1 in tobacco (Nicotiana tabacum) decreased the level of acetyl esters of pectin but not of xylan. Deacetylation engendered differential changes in the composition and/or structure of cell wall polysaccharides that subsequently impaired the cellular elongation of floral styles and filaments, the germination of pollen grains, and the growth of pollen tubes. Consequently, plants overexpressing PAE1 exhibited severe male sterility. Furthermore, in contrast to the conventional view, PAE1-mediated deacetylation substantially lowered the digestibility of pectin. Our data suggest that pectin acetylesterase functions as an important structural regulator in planta by modulating the precise status of pectin acetylation to affect the remodeling and physiochemical properties of the cell wall's polysaccharides, thereby affecting cell extensibility.

DOI: 10.1105/tpc.111.092411
PubMed: 22247250
PubMed Central: PMC3289554

Affiliations:

États-Unis

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

to stream Main, to step Corpus: 002B69
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Le document en format XML

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<front><div type="abstract" xml:lang="en">Pectin is a major component of the primary cell wall of higher plants. Some galacturonyl residues in the backbone of pectinaceous polysaccharides are often O-acetylated at the C-2 or C-3 position, and the resulting acetylesters change dynamically during the growth and development of plants. The processes involve both enzymatic acetylation and deacetylation. Through genomic sequence analysis, we identified a pectin acetylesterase (PAE1) from black cottonwood (Populus trichocarpa). Recombinant Pt PAE1 exhibited preferential activity in releasing the acetate moiety from sugar beet (Beta vulgaris) and potato (Solanum tuberosum) pectin in vitro. Overexpressing Pt PAE1 in tobacco (Nicotiana tabacum) decreased the level of acetyl esters of pectin but not of xylan. Deacetylation engendered differential changes in the composition and/or structure of cell wall polysaccharides that subsequently impaired the cellular elongation of floral styles and filaments, the germination of pollen grains, and the growth of pollen tubes. Consequently, plants overexpressing PAE1 exhibited severe male sterility. Furthermore, in contrast to the conventional view, PAE1-mediated deacetylation substantially lowered the digestibility of pectin. Our data suggest that pectin acetylesterase functions as an important structural regulator in planta by modulating the precise status of pectin acetylation to affect the remodeling and physiochemical properties of the cell wall's polysaccharides, thereby affecting cell extensibility.</div>
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<Abstract><AbstractText>Pectin is a major component of the primary cell wall of higher plants. Some galacturonyl residues in the backbone of pectinaceous polysaccharides are often O-acetylated at the C-2 or C-3 position, and the resulting acetylesters change dynamically during the growth and development of plants. The processes involve both enzymatic acetylation and deacetylation. Through genomic sequence analysis, we identified a pectin acetylesterase (PAE1) from black cottonwood (Populus trichocarpa). Recombinant Pt PAE1 exhibited preferential activity in releasing the acetate moiety from sugar beet (Beta vulgaris) and potato (Solanum tuberosum) pectin in vitro. Overexpressing Pt PAE1 in tobacco (Nicotiana tabacum) decreased the level of acetyl esters of pectin but not of xylan. Deacetylation engendered differential changes in the composition and/or structure of cell wall polysaccharides that subsequently impaired the cellular elongation of floral styles and filaments, the germination of pollen grains, and the growth of pollen tubes. Consequently, plants overexpressing PAE1 exhibited severe male sterility. Furthermore, in contrast to the conventional view, PAE1-mediated deacetylation substantially lowered the digestibility of pectin. Our data suggest that pectin acetylesterase functions as an important structural regulator in planta by modulating the precise status of pectin acetylation to affect the remodeling and physiochemical properties of the cell wall's polysaccharides, thereby affecting cell extensibility.</AbstractText>
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Acetylesterase-mediated deacetylation of pectin impairs cell elongation, pollen germination, and plant reproduction.

Acetylesterase-mediated deacetylation of pectin impairs cell elongation, pollen germination, and plant reproduction.

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