ArticlePlant physiology2007
Arabidopsis INOSITOL TRANSPORTER2 mediates H+ symport of different inositol epimers and derivatives across the plasma membrane.
Article in Plant physiology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.
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Who cites it
23 citing papers in PubMed, 62 citations in OpenAlex.
- Towards a Holistic View of the Orchestration Between Sugar Transporters in Cereal Crops.Plants (Basel, Switzerland) · 2026Article
- Inhibiting inositol transport disrupts metabolite profiles and mimics heat stress in a model cnidarian-Symbiodiniaceae symbiosis.Communications biology · 2025Article
- The Vacuolar Inositol Transporter BvINT1;1 Contributes to Raffinose Biosynthesis and Reactive Oxygen Species Scavenging During Cold Stress in Sugar Beet.Plant, cell & environment · 2025Article
- Types of Membrane Transporters and the Mechanisms of Interaction between Them and Reactive Oxygen Species in Plants.Antioxidants (Basel, Switzerland) · 2024Review
- Exogenously Applied Cyclitols and Biosynthesized Silver Nanoparticles Affect the Soluble Carbohydrate Profiles of Wheat (Plants (Basel, Switzerland) · 2023Article
- Antimicrobial Peptides from Plants: A cDNA-Library Based Isolation, Purification, Characterization Approach and Elucidating Their Modes of Action.International journal of molecular sciences · 2021Review
- Transformation ofPlant biotechnology (Tokyo, Japan) · 2021Article
- Genome-wide identification, expression, and association analysis of the monosaccharide transporter (MST) gene family in peanut (3 Biotech · 2020Article
- The sugar transporter system of strawberry: genome-wide identification and expression correlation with fruit soluble sugar-related traits in aHorticulture research · 2020Article
- Genome-wide identification of MST, SUT and SWEET family sugar transporters in root parasitic angiosperms and analysis of their expression during host parasitism.BMC plant biology · 2019Article
- Glucose Uptake via STP Transporters Inhibits in Vitro Pollen Tube Growth in a HEXOKINASE1-Dependent Manner inThe Plant cell · 2018Article
- Sugar Transporter STP7 Specificity for l-Arabinose and d-Xylose Contrasts with the Typical Hexose Transporters STP8 and STP12.Plant physiology · 2018Article
- The Tonoplastic Inositol Transporter INT1 FromFrontiers in plant science · 2018Article
- Protoplast-Esculin Assay as a New Method to Assay Plant Sucrose Transporters: Characterization of AtSUC6 and AtSUC7 Sucrose Uptake Activity in Arabidopsis Col-0 Ecotype.Frontiers in plant science · 2018Article
- Floral Metabolism of Sugars and Amino Acids: Implications for Pollinators' Preferences and Seed and Fruit Set.Plant physiology · 2017Review
- Understanding arsenic dynamics in agronomic systems to predict and prevent uptake by crop plants.The Science of the total environment · 2017Review
- Inositol transporters AtINT2 and AtINT4 regulate arsenic accumulation in Arabidopsis seeds.Nature plants · 2016Article
- Article
- Arabidopsis thaliana POLYOL/MONOSACCHARIDE TRANSPORTERS 1 and 2: fructose and xylitol/H+ symporters in pollen and young xylem cells.Journal of experimental botany · 2010Article
- Myoinositol oxygenase controls the level of myoinositol in Arabidopsis, but does not increase ascorbic acid.Plant physiology · 2009Article
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Authors and funding
7 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Of the four genes of the Arabidopsis (Arabidopsis thaliana) INOSITOL TRANSPORTER family (AtINT family) so far only AtINT4 has been described. Here we present the characterization of AtINT2 and AtINT3. cDNA sequencing revealed that the AtINT3 gene is incorrectly spliced and encodes a truncated protein of only 182 amino acids with four transmembrane helices. In contrast, AtINT2 codes for a functional transporter. AtINT2 localization in the plasma membrane was demonstrated by transient expression of an AtINT2-GREEN FLUORESCENT PROTEIN fusion in Arabidopsis and tobacco (Nicotiana tabacum) epidermis cells and in Arabidopsis protoplasts. Its functional and kinetic properties were determined by expression in yeast (Saccharomyces cerevisiae) cells and Xenopus laevis oocytes. Expression of AtINT2 in a Deltaitr1 (inositol uptake)/Deltaino1 (inositol biosynthesis) double mutant of bakers' yeast complemented the deficiency of this mutant to grow on low concentrations of myoinositol. In oocytes, AtINT2 mediated the symport of H(+) and several inositol epimers, such as myoinositol, scylloinositol, d-chiroinositol, and mucoinositol. The preference for individual epimers differed from that found for AtINT4. Moreover, AtINT2 has a lower affinity for myoinositol (K(m) = 0.7-1.0 mm) than AtINT4 (K(m) = 0.24 mm), and the K(m) is slightly voltage dependent, which was not observed for AtINT4. Organ and tissue specificity of AtINT2 expression was analyzed in AtINT2 promoter/reporter gene plants and showed weak expression in the anther tapetum, the vasculature, and the leaf mesophyll. A T-DNA insertion line (Atint2.1) and an Atint2.1/Atint4.2 double mutant were analyzed under different growth conditions. The physiological roles of AtINT2 are discussed.
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