ThuliumV1, Main, Exploration, bibRecord, 002C47

A new cDNA encoding a xyloglucan endo -transglycosylase-related polypeptide ( AtXTR8 ) preferentially expressed in seedling, root and stem of Arabidopsis thaliana

Identifieur interne : 002C47 ( Main/Exploration ); précédent : 002C46; suivant : 002C48

A new cDNA encoding a xyloglucan endo -transglycosylase-related polypeptide ( AtXTR8 ) preferentially expressed in seedling, root and stem of Arabidopsis thaliana

Auteurs : Dominique Aubert [France] ; Michel Herzog [France]

Source :

Plant Science [ 0168-9452 ] ; 1996.

RBID : ISTEX:D9FB2119D689E57D280A9B49D8E6D61AC7E41B45

Descripteurs français

Wicri :
- topic : Plant.

English descriptors

Abstract

Abstract: A new cDNA clone (AtXTR8) encoding a xyloglucan endo-transglycosylase (XET)-related protein was isolated from an Arabidopsis thaliana germinating seed cDNA library, using a differential screen. The predicted amino acid sequence displays only 38 to 42% amino acid identity with other members of the Arabidopsis XTR (XET-related) protein family but shows 64% identity to a xyloglucan endo-transglycosylase enzyme (TmNXG1) expressed in nasturtium (Tropaeolum majus) germinating seeds. The AtXTR8 transcipts are expressed in germinating seeds as early as 24 h after imbibition with highest level of accumulation reached at about 72 h. In adult plants, transcripts are mainly detected in roots and to a lower extent in inflorescence stems. During imbibition of the severely gibberellin-deficient gal-3 mutant seeds, transcripts are detected only if exogenous gibberellins are supplied in the medium. suggesting that gibberellins are directly or indirectly required for AtXTR8 gene expression. Unlike other XET genes such as TCH4, EXT and XTR3 which are rapidly activated by auxins in wild type Arabidopsis, the steady state level of AtXTR8 transcripts is not markedly increased by auxin treatment of 6-day-old seedlings. Phylogenetic analysis confirms that the XET and XTR protein sequences so far identified in various plant species split in three groups and Arabidopsis AtXTR8, which enzymatic activity has not been assessed, belongs to the least related group III.

Url:

https://api.istex.fr/document/D9FB2119D689E57D280A9B49D8E6D61AC7E41B45/fulltext/pdf

DOI: 10.1016/S0168-9452(96)04522-0

Affiliations:

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Le document en format XML

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<term>Arubidopsis</term>
<term>Atxtr8</term>
<term>Atxtr8 cdna</term>
<term>Atxtr8 gene</term>
<term>Atxtr8 gene expression</term>
<term>Atxtr8 mrna accumulation</term>
<term>Atxtr8 sequence</term>
<term>Atxtr8 signal</term>
<term>Atxtr8 transcripts</term>
<term>Auxin</term>
<term>Auxin treatment</term>
<term>Bestfit program</term>
<term>Biol</term>
<term>Cdna</term>
<term>Cell wall</term>
<term>Cellulose microfibrils</term>
<term>Clone</term>
<term>Complex cdna probe</term>
<term>Cotyledon</term>
<term>Cucumber hypocotyls</term>
<term>Different expression patterns</term>
<term>Differential screen</term>
<term>Enzymatic activity</term>
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<term>Expression patterns</term>
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<term>Fresh medium</term>
<term>Gapc</term>
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<term>Gene family</term>
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<term>Germinating</term>
<term>Germinating seeds</term>
<term>Germination</term>
<term>Germination process</term>
<term>Gibberellin</term>
<term>Gibberellin biosynthetic inhibitor uniconazol</term>
<term>High levels</term>
<term>Imbibition</term>
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<term>Lower extent</term>
<term>Maize roots</term>
<term>Mrna</term>
<term>Msar medium</term>
<term>Mutant</term>
<term>Nasturtium</term>
<term>Nasturtium tmnxgl</term>
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<term>Other members</term>
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<term>Physiol</term>
<term>Plant cell</term>
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<term>Protein sequence</term>
<term>Protein sequences</term>
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<term>Tmnxgl protein</term>
<term>Various plant species</term>
<term>Vegetative tissues</term>
<term>Wild type</term>
<term>Wild type seedlings</term>
<term>Wild type seeds</term>
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<term>Xyloglucan activity</term>
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<term>Arubidopsis</term>
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<term>Atxtr8 mrna accumulation</term>
<term>Atxtr8 sequence</term>
<term>Atxtr8 signal</term>
<term>Atxtr8 transcripts</term>
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<term>Auxin treatment</term>
<term>Bestfit program</term>
<term>Biol</term>
<term>Cdna</term>
<term>Cell wall</term>
<term>Cellulose microfibrils</term>
<term>Clone</term>
<term>Complex cdna probe</term>
<term>Cotyledon</term>
<term>Cucumber hypocotyls</term>
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<term>Enzymatic activity</term>
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<term>Fresh medium</term>
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<term>Gene family</term>
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<term>Msar medium</term>
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<term>Other hand</term>
<term>Other members</term>
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<front><div type="abstract" xml:lang="en">Abstract: A new cDNA clone (AtXTR8) encoding a xyloglucan endo-transglycosylase (XET)-related protein was isolated from an Arabidopsis thaliana germinating seed cDNA library, using a differential screen. The predicted amino acid sequence displays only 38 to 42% amino acid identity with other members of the Arabidopsis XTR (XET-related) protein family but shows 64% identity to a xyloglucan endo-transglycosylase enzyme (TmNXG1) expressed in nasturtium (Tropaeolum majus) germinating seeds. The AtXTR8 transcipts are expressed in germinating seeds as early as 24 h after imbibition with highest level of accumulation reached at about 72 h. In adult plants, transcripts are mainly detected in roots and to a lower extent in inflorescence stems. During imbibition of the severely gibberellin-deficient gal-3 mutant seeds, transcripts are detected only if exogenous gibberellins are supplied in the medium. suggesting that gibberellins are directly or indirectly required for AtXTR8 gene expression. Unlike other XET genes such as TCH4, EXT and XTR3 which are rapidly activated by auxins in wild type Arabidopsis, the steady state level of AtXTR8 transcripts is not markedly increased by auxin treatment of 6-day-old seedlings. Phylogenetic analysis confirms that the XET and XTR protein sequences so far identified in various plant species split in three groups and Arabidopsis AtXTR8, which enzymatic activity has not been assessed, belongs to the least related group III.</div>
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A new cDNA encoding a xyloglucan endo -transglycosylase-related polypeptide ( AtXTR8 ) preferentially expressed in seedling, root and stem of Arabidopsis thaliana

A new cDNA encoding a xyloglucan endo -transglycosylase-related polypeptide ( AtXTR8 ) preferentially expressed in seedling, root and stem of Arabidopsis thaliana

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri