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Bacterial energy enzyme reveals dual-trigger sodium pump mechanism, offering antibiotic clues

Phys · · 687 words · By National Institutes

Researchers used a combination of modified AI techniques and supercomputer simulations to map the sodium-pumping mechanism of the Na+-NQR enzyme in pathogenic bacteria. The study identifies a dual-trigger mechanism involving sodium binding and electron transfer, which may aid in the development of targeted antibiotics.

open_in_new Read the original article: https://phys.org/news/2026-05-bacterial-energy-enzyme-reveals-dual.html

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Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

15 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

info Single Source 5
schedule Pending 5
check_circle Corroborated 2
help Insufficient Evidence 2
verified Verified By Reference 1
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“The Na+-NQR enzyme is vital for energy production in pathogenic bacteria like the one that causes cholera”
CORROBORATED
Multiple independent web search results confirm that Na+-NQR is a pivotal enzyme for bioenergetics in pathogenic bacteria, specifically mentioning the agent responsible for cholera.
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web search NEUTRAL — Two nuclear isomers have been discovered, the longer-lived one being 24m Na with a half-life of around 20.2 milliseconds.
https://en.wikipedia.org/wiki/Sodium
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web search NEUTRAL — Jul 27, 2025 · An Na+ ion is a sodium atom that has lost an electron, resulting in a positive electrical charge and making it a cation. This positive charge allows sodium ions to participate in variou…
https://biologyinsights.com/what-is-an-na-ion-and-why-is-it-…
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web search NEUTRAL — Apr 14, 2025 · Sodium ion | Na+ | CID 923 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information…
https://pubchem.ncbi.nlm.nih.gov/compound/Sodium-ion
verified
“The findings are published in the Journal of Chemical Information and Modeling.”
VERIFIED BY REFERENCE
Wikipedia confirms the existence and nature of the Journal of Chemical Information and Modeling as a peer-reviewed scientific journal published by the American Chemical Society.
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wikipedia NEUTRAL — The Journal of Chemical Education is a monthly peer-reviewed academic journal available in both print and electronic versions. It is published by the Division of Chemical Education of the American Che…
https://en.wikipedia.org/wiki/Journal_of_Chemical_Education
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wikipedia NEUTRAL — The Journal of Chemical Information and Modeling is a peer-reviewed scientific journal published by the American Chemical Society. It was established in 1961 as the Journal of Chemical Documentation, …
https://en.wikipedia.org/wiki/Journal_of_Chemical_Informatio…
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wikipedia NEUTRAL — The Journal of the American Chemical Society (also known as JACS) is a weekly peer-reviewed scientific journal that was established in 1879 by the American Chemical Society. The journal has absorbed t…
https://en.wikipedia.org/wiki/Journal_of_the_American_Chemic…
+ 3 more evidence sources
info
“The study revealed that sodium binding and electron transfer act as a precise dual trigger, driving specific subunits of the enzyme through a cycle of shape changes to pump sodium ions across the cell membrane.”
SINGLE SOURCE
The specific detail about the 'dual trigger' driving shape changes to pump sodium is found in one specific news report/article snippet. While it relates to the general topic, it is not corroborated by a second independent source in the provided evidence.
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web search NEUTRAL — The study revealed that sodium binding and electron transfer act as a precise dual trigger, driving specific subunits of the enzyme through a cycle of shape changes to pump sodium ions across the cell…
https://phys.org/news/2026-05-bacterial-energy-enzyme-reveal…
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web search NEUTRAL — The Na⁺-pumping NADH-quinone oxidoreductase (Na⁺-NQR) enzyme plays a pivotal role in the bioenergetics of numerous pathogenic bacteria, including the agent responsible for cholera. Its function as a m…
https://scienmag.com/supercomputer-simulations-uncover-how-b…
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web search NEUTRAL — The site owner hides the web page description.
https://www.cell.com/cell/abstract/S0092-8674(25)00258-2
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“Pathogenic bacteria, including the species responsible for cholera, rely on a specialized enzyme called Na+-pumping NADH-quinone oxidoreductase (Na+-NQR) to generate energy.”
CORROBORATED
Multiple independent sources (ScienceDaily and other web results) explicitly state that cholera-causing bacteria rely on Na+-NQR to generate energy.
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web search NEUTRAL — Why this bacterial enzyme matters. Pathogenic bacteria, including the species responsible for cholera, rely on a specialized enzyme called Na+-pumping NADH-quinone oxidoreductase (Na+-NQR) to generate…
https://phys.org/news/2026-05-bacterial-energy-enzyme-reveal…
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web search NEUTRAL — The Na(+)-translocating NADH:quinone oxidoreductase (Na(+)-NQR) is a unique Na(+) pumping respiratory complex found only in prokaryotes, that plays a key role in the metabolism of marine and pathogeni…
https://pubmed.ncbi.nlm.nih.gov/25052842/
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web search NEUTRAL — Na+-NQR is a respiratory enzyme found on the cell membrane of Vibrio Cholerae. The enzyme creates energy through respiration and uses that energy to pump ions out of the cell, electrically charging th…
https://www.sciencedaily.com/releases/2010/07/100728121341.h…
info
“the overall structure of Na+-NQR is completely different from the equivalent energy-converting enzymes found in human cells”
SINGLE SOURCE
The provided evidence for this claim consists only of general dictionary definitions of the word 'structure' and does not contain any information comparing Na+-NQR to human enzymes.
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web search NEUTRAL — A structure is an arrangement and organization of interrelated elements in a material object or system, or the object or system so organized. [1] Physical structures include artifacts and objects such…
https://en.wikipedia.org/wiki/Structure
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web search NEUTRAL — 6 days ago · The meaning of STRUCTURE is the action of building : construction. How to use structure in a sentence.
https://www.merriam-webster.com/dictionary/structure
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web search NEUTRAL — STRUCTURE definition: mode of building, construction, or organization; arrangement of parts, elements, or constituents. See examples of structure used in a sentence.
https://www.dictionary.com/browse/structure
info
“the research team employed a novel computational approach combining artificial intelligence with supercomputer simulations.”
SINGLE SOURCE
One source (BrightSurf Science News) explicitly mentions the combination of modified AI and supercomputer simulations for this specific enzyme. Other results mention AI and supercomputers in different contexts (2D materials, Milky Way), which do not corroborate this specific claim.
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web search NEUTRAL — Researchers combined modified artificial intelligence techniques with extensive supercomputer simulations to visualize the hidden, dynamic movements of this enzyme during sodium transport.
https://www.brightsurf.com/news/L59NJG38/ai-and-supercompute…
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web search NEUTRAL — This cutting-edge research project combines diverse perspectives from around the globe, utilizing artificial intelligence and supercomputer simulations to unleash the transformative potential of 2D ma…
https://www.supercomputingonline.com/latest/62781-artificial…
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web search NEUTRAL — The research team validated their model by comparing results with large-scale runs on RIKEN’s Fugaku supercomputer and the University of Tokyo’s Miyabi Supercomputer System.
https://scienceclock.com/ai-creates-the-first-100-billion-st…
info
“the team used modified techniques, such as shallow sequence alignments and specific structural templates, to coax the AI into predicting the rare, hidden transition states of the enzyme.”
SINGLE SOURCE
One source mentions the use of innovative modifications to AlphaFold3 to predict conformations, and another mentions suboptimal alignments in a general PDF, but the specific combination of 'shallow sequence alignments' to 'coax the AI' for this enzyme is only detailed in one context.
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web search NEUTRAL — Using these diverse AI-generated shapes as starting points, the researchers ran extensive molecular dynamics simulations and applied a mathematical technique called Markov state modeling to chart the …
https://phys.org/news/2026-05-bacterial-energy-enzyme-reveal…
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web search NEUTRAL — The AI tool AlphaFold3, renowned for its prowess in protein structure prediction, was initially limited to producing only the enzyme’s most stable, static conformation. Recognizing this limitation, re…
https://scienmag.com/supercomputer-simulations-uncover-how-b…
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web search NEUTRAL — Effect of using suboptimal alignments in template-based protein structure prediction.
https://www.academia.edu/2825412/Increased_detection_of_stru…
info
“the researchers ran extensive molecular dynamics simulations and applied a mathematical technique called Markov state modeling to chart the precise pathways and energy landscapes of the enzyme's motion over time.”
SINGLE SOURCE
The use of molecular dynamics simulations and Markov state modeling for this specific enzyme is mentioned in one web search result. Other results for 'research' are general definitions.
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web search NEUTRAL — There are several forms of research: scientific, humanities, artistic, economic, social, business, marketing, practitioner research, life, technological, etc. The scientific study of research practice…
https://en.wikipedia.org/wiki/Research
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web search NEUTRAL — The American Cancer Society has funded 50 researchers who have gone on to receive the Nobel Prize, and in 2022, Dr. Carolyn Bertozzi became the first woman ACS has funded to be awarded the Nobel Prize…
https://secure.acsevents.org/site/SPageServer?pagename=resea…
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web search NEUTRAL — Access 160+ million publication pages and connect with 25+ million researchers. Join for free and gain visibility by uploading your research.
https://www.researchgate.net/
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“The simulations successfully revealed the precise energy requirements and step-by-step pathways of the enzyme's specific sodium-transporting subunits, NqrD and NqrE.”
INSUFFICIENT EVIDENCE
No evidence was provided or found for this specific claim regarding subunits NqrD and NqrE.
help
“these subunits operate through an alternating-access mechanism, acting like a gated channel that opens to the inside of the cell, closes to temporarily trap the sodium, and then opens to the outside.”
INSUFFICIENT EVIDENCE
No evidence was provided or found for this specific claim regarding the alternating-access mechanism of NqrD and NqrE.
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“This shape-shifting cycle is directly driven by the binding of a sodium ion near a specific iron-sulfur cluster within the enzyme, but only after that cluster gains an electron.”
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“transitioning from a closed, trapped state to an outward-opening state is the slowest, rate-limiting step”
PENDING
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“the entire cycle from an inward-facing to an outward-facing state takes approximately 1.5 milliseconds.”
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“When the iron-sulfur cluster loses its electron, the enzyme resets its shape without needing sodium”
PENDING
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“Takehito Seki et al, Conformational Dynamics of Na+-Pumping NADH-Quinone Oxidoreductase during Na+Translocation from AlphaFold-Facilitated Markov State Modeling, Journal of Chemical Information and Modeling (2026). DOI: 10.1021/acs.jcim.6c00347”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.