ArticlePlanta2012
AtPTR4 and AtPTR6 are differentially expressed, tonoplast-localized members of the peptide transporter/nitrate transporter 1 (PTR/NRT1) family.
Article in Planta, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed, 50 citations in OpenAlex.
- Beyond membrane transport: Transporters as dynamic signal integrators for plant signaling and adaptation.Plant communications · 2026Review
- The Maize ZmbHLH118 Transcription Factor Regulates Vacuolar Nitrate Loading by the NOAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- Functional characterization of NRT1/PTR FAMILY transporters: looking for a needle in a haystack.The New phytologist · 2026Review
- Not to be overlooked: dipeptides and their role in plant stress resilience.Journal of experimental botany · 2025Review
- Weighted Gene Correlation Network Analysis Reveals Key Regulatory Genes Influencing Selenium Enrichment and Yield with Exogenous Selenite in Tartary Buckwheat.Plants (Basel, Switzerland) · 2025Article
- Modulation of warm temperature-sensitive growth using a phytochrome B dark reversion variant, phyB[G515E], in Arabidopsis and rice.Journal of advanced research · 2024Article
- Nitrate transporter protein NPF5.12 and major latex-like protein MLP6 are important defense factors against Verticillium longisporum.Journal of experimental botany · 2024Article
- Study of vacuole glycerate transporter NPF8.4 reveals a new role of photorespiration in C/N balance.Nature plants · 2023Article
- CLCNt2 Mediates Nitrate Content in Tobacco Leaf, Impacting the Production of Tobacco-Specific Nitrosamines in Cured Leaves.Frontiers in plant science · 2022Article
- Distinct identities of leaf phloem cells revealed by single cell transcriptomics.The Plant cell · 2021Article
- Function of pea amino acid permease AAP6 in nodule nitrogen metabolism and export, and plant nutrition.Journal of experimental botany · 2018Article
- The key genes and pathways related to male sterility of eggplant revealed by comparative transcriptome analysis.BMC plant biology · 2018Article
- Identification of Iridoid Glucoside Transporters in Catharanthus roseus.Plant & cell physiology · 2017Article
- Sucrose Transporter Localization and Function in Phloem Unloading in Developing Stems.Plant physiology · 2017Article
- An NPF transporter exports a central monoterpene indole alkaloid intermediate from the vacuole.Nature plants · 2017Article
- The Rice Peptide TransporterFrontiers in plant science · 2017Article
- Dual-targeting of Arabidopsis DMP1 isoforms to the tonoplast and the plasma membrane.PloS one · 2017Article
- Nitrate Uptake Affects Cell Wall Synthesis and Modeling.Frontiers in plant science · 2017Review
- Whole Genome Sequencing Reveals Potential New Targets for Improving Nitrogen Uptake and Utilization inFrontiers in plant science · 2016Article
- Knock-Down of a Tonoplast Localized Low-Affinity Nitrate TransporterFrontiers in plant science · 2016Article
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Members of the peptide transporter/nitrate transporter 1 (PTR/NRT1) family in plants transport a variety of substrates like nitrate, di- and tripepetides, auxin and carboxylates. We isolated two members of this family from Arabidopsis, AtPTR4 and AtPTR6, which are highly homologous to the characterized di- and tripeptide transporters AtPTR1, AtPTR2 and AtPTR5. All known substrates of members of the PTR/NRT1 family were tested using heterologous expression in Saccharomyces cerevisiae mutants and oocytes of Xenopus laevis, but none could be identified as substrate of AtPTR4 or AtPTR6. AtPTR4 and AtPTR6 show distinct expression patterns, while AtPTR4 is expressed in the vasculature of the plants, AtPTR6 is highly expressed in pollen and during senescence. Phylogenetic analyses revealed that AtPTR2, 4 and 6 belong to one clade of subgoup II, whereas AtPTR1 and 5 are found in a second clade. Like AtPTR2, AtPTR4-GFP and AtPTR6-GFP fusion proteins are localized at the tonoplast. Vacuolar localization was corroborated by co-localization of AtPTR2-YFP with the tonoplast marker protein GFP-AtTIP2;1 and AtTIP1;1-GFP. This indicates that the two clades reflect different intracellular localization at the tonoplast (AtPTR2, 4, 6) and plasma membrane (AtPTR1, 5), respectively.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.