ArticleThe Journal of biological chemistry2009
Residues important for nitrate/proton coupling in plant and mammalian CLC transporters.
Article in The Journal of biological chemistry, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
53 citing papers in PubMed.
- Database ofKidney international reports · 2026Article
- The Maize ZmbHLH118 Transcription Factor Regulates Vacuolar Nitrate Loading by the NOAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- NitrOFF: An Engineered Fluorescent Biosensor to Illuminate Nitrate Transport in Living Cells.Angewandte Chemie (International ed. in English) · 2025Article
- Expression of the grapevine anion transporter ALMT2 in Arabidopsis roots decreases the shoot Cl-/NO3- ratio under salt stress.Journal of experimental botany · 2025Article
- NitrOFF: An engineered fluorescent biosensor to illuminate nitrate transport in living cells.bioRxiv : the preprint server for biology · 2025Article
- CLC gene family inFrontiers in plant science · 2025Article
- Chloride transport and homeostasis in plants.Quantitative plant biology · 2025Review
- Molecular mechanism underlying regulation of Arabidopsis CLCa transporter by nucleotides and phospholipids.Nature communications · 2023Article
- Unveiling the impact of lysosomal ion channels: balancing ion signaling and disease pathogenesis.The Korean journal of physiology & pharmacology : official journal of the Korean Physiological Society and the Korean Society of Pharmacology · 2023Review
- ClC-7 drives intraphagosomal chloride accumulation to support hydrolase activity and phagosome resolution.The Journal of cell biology · 2023Article
- Article
- The role of conformational change and key glutamic acid residues in the ClC-ec1 antiporter.Biophysical journal · 2023Article
- Proton exchange by the vacuolar nitrate transporter CLCa is required for plant growth and nitrogen use efficiency.The Plant cell · 2023Article
- Unlocking the potentials of nitrate transporters at improving plant nitrogen use efficiency.Frontiers in plant science · 2023Review
- Molecular Cloning and Characterization of SaCLCd, SaCLCf, and SaCLCg, Novel Proteins of the Chloride Channel Family (CLC) from the HalophytePlants (Basel, Switzerland) · 2022Article
- The Role of the Lysosomal ClCells · 2022Review
- Root-Specific Expression ofFrontiers in plant science · 2022Article
- A Recurrent Gain-of-Function Mutation in CLCN6, Encoding the ClC-6 ClAmerican journal of human genetics · 2020Article
- Plant nitrogen uptake and assimilation: regulation of cellular pH homeostasis.Journal of experimental botany · 2020Review
- Transcriptomic and network analyses reveal distinct nitrate responses in light and dark in rice leaves (Oryza sativa Indica var. Panvel1).Scientific reports · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Members of the CLC gene family either function as chloride channels or as anion/proton exchangers. The plant AtClC-a uses the pH gradient across the vacuolar membrane to accumulate the nutrient NO(3)(-) in this organelle. When AtClC-a was expressed in Xenopus oocytes, it mediated NO(3)(-)/H(+) exchange and less efficiently mediated Cl(-)/H(+) exchange. Mutating the "gating glutamate" Glu-203 to alanine resulted in an uncoupled anion conductance that was larger for Cl(-) than NO(3)(-). Replacing the "proton glutamate" Glu-270 by alanine abolished currents. These could be restored by the uncoupling E203A mutation. Whereas mammalian endosomal ClC-4 and ClC-5 mediate stoichiometrically coupled 2Cl(-)/H(+) exchange, their NO(3)(-) transport is largely uncoupled from protons. By contrast, the AtClC-a-mediated NO(3)(-) accumulation in plant vacuoles requires tight NO(3)(-)/H(+) coupling. Comparison of AtClC-a and ClC-5 sequences identified a proline in AtClC-a that is replaced by serine in all mammalian CLC isoforms. When this proline was mutated to serine (P160S), Cl(-)/H(+) exchange of AtClC-a proceeded as efficiently as NO(3)(-)/H(+) exchange, suggesting a role of this residue in NO(3)(-)/H(+) exchange. Indeed, when the corresponding serine of ClC-5 was replaced by proline, this Cl(-)/H(+) exchanger gained efficient NO(3)(-)/H(+) coupling. When inserted into the model Torpedo chloride channel ClC-0, the equivalent mutation increased nitrate relative to chloride conductance. Hence, proline in the CLC pore signature sequence is important for NO(3)(-)/H(+) exchange and NO(3)(-) conductance both in plants and mammals. Gating and proton glutamates play similar roles in bacterial, plant, and mammalian CLC anion/proton exchangers.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.