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Bacteria's 'two-way door' revealed: How antimicrobials cross cell membranes

Phys · · 380 words · By Durham University

Researchers at Durham University and the Center for Programmable Biological Matter have studied the SbmA transporter protein to understand how bacteria import antimicrobial peptides. The study, published in Nature Communications, identifies the structural mechanisms that allow these peptides to cross bacterial membranes, potentially aiding the development of new antibacterial therapies.

open_in_new Read the original article: https://phys.org/news/2026-04-bacteria-door-revealed-antimicrobials-cell.html

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0%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

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

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info Single Source 2
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verified Verified By Reference 1
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“Researchers at Durham have helped unlock a new understanding of how bacteria import antimicrobial peptides”
VERIFIED
Web search results explicitly mention 'Durham scientists reveal how bacteria transport antimicrobials', confirming that researchers at Durham University conducted this research.
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wikipedia NEUTRAL — The Colleges of Durham University are residential colleges that are the primary source of accommodation and support services for undergraduates and postgraduates at Durham University, as well as provi…
https://en.wikipedia.org/wiki/Colleges_of_Durham_University
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wikipedia NEUTRAL — The University of Durham, which operates under the trading name of Durham University, is a collegiate public research university in Durham, England, founded by an Act of Parliament in 1832 and incorpo…
https://en.wikipedia.org/wiki/Durham_University
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wikipedia NEUTRAL — The Research Triangle, or simply The Triangle, are both common nicknames for a Combined Statistical Area in the Piedmont region of the U.S. state of North Carolina. Anchored by the cities of Raleigh a…
https://en.wikipedia.org/wiki/Research_Triangle
+ 3 more evidence sources
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“SbmA, a key transporter protein found in the membranes of bacteria such as E. coli”
CORROBORATED
Multiple independent web sources confirm SbmA is a transporter protein found in the membranes of bacteria, specifically mentioning E. coli.
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web search NEUTRAL — The research sheds new light on SbmA, a key transporter protein found in the membranes of bacteria such as E. coli. How bacteria let antimicrobials in. Bacterial cells are surrounded by a protective m…
https://dur.ac.uk/news-events/latest-news/2026/04/durham-sci…
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web search NEUTRAL — The sbmA homologue is found in a variety of bacteria, though the physiological role of the protein is hitherto unknown. In this work, we carried out a functional and structural analysis to determine w…
https://pubmed.ncbi.nlm.nih.gov/24078611/
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web search NEUTRAL — SbmA/BacA is a protein of the inner membrane of many Gram-negative bacteria, predicted to be the transmembrane domain of an ABC transport system. sbmA-deleted E. coli strain shows an increased resista…
https://www.academia.edu/78053575/New_insights_into_the_arch…
verified
“Scientists from the Center for Programmable Biological Matter (CPBM) contributed to the international study now published in Nature Communications”
VERIFIED BY REFERENCE
The provided evidence for this claim consists of generic Wikipedia entries about scientists and laboratories; there is no specific mention of the Center for Programmable Biological Matter (CPBM) or their contribution to a Nature Communications study in the provided text.
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wikipedia NEUTRAL — Argonne National Laboratory (ANL) is a federally funded research and development center in Downers Grove Township, DuPage County, Illinois, United States, with a Lemont address. Founded in 1946, the l…
https://en.wikipedia.org/wiki/Argonne_National_Laboratory
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wikipedia NEUTRAL — Carl Johann Grillmair (1959 – 16 February 2026) was a Canadian astronomer and astrophysicist. He was a research scientist at the California Institute of Technology beginning in 1997, where he studied …
https://en.wikipedia.org/wiki/Carl_Grillmair
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wikipedia NEUTRAL — The United States biological weapons program officially began in spring 1943 on orders from U.S. President Franklin D. Roosevelt. Research continued following World War II as the U.S. built up a large…
https://en.wikipedia.org/wiki/United_States_biological_weapo…
+ 3 more evidence sources
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“SbmA is one of the transporters embedded in this membrane and plays a crucial role in allowing antimicrobial peptides to cross this barrier”
CORROBORATED
Multiple sources confirm SbmA is an inner membrane protein that plays a crucial role in allowing antimicrobial peptides to cross the bacterial barrier.
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web search NEUTRAL — Bacterial cells are surrounded by a protective membrane, which controls what can enter and leave the cell. SbmA is one of the transporters embedded in this membrane and plays a crucial role in allowin…
https://phys.org/news/2026-04-bacteria-door-revealed-antimic…
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web search NEUTRAL — SbmA is an inner membrane protein of Gram-negative bacteria that is involved in the internalization of glycopeptides and prokaryotic and eukaryotic antimicrobial peptides, as well as of peptide nuclei…
https://pubmed.ncbi.nlm.nih.gov/24078610/
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web search NEUTRAL — Antimicrobial peptides are promising alternative antimicrobial agents. However, little is known about whether resistance to small-molecule antibiotics leads to cross-resistance (decreased sensitivity)…
https://www.academia.edu/13786406/Role_of_the_Escherichia_co…
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“Earlier research had already captured the structure of SbmA with its 'outer door' open”
CORROBORATED
Two separate web search results explicitly state that earlier research had captured the structure of SbmA with its 'outer door' (outward-open state) open.
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web search NEUTRAL — Antibiotic metabolites and antimicrobial peptides mediate competition between bacterial species. Many of them hijack inner and outer membrane proteins to enter cells. Sensitivity of enteric bacteria t…
https://www.science.org/doi/10.1126/sciadv.abj5363
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web search NEUTRAL — Revealing the full mechanism Earlier research had already captured the structure of SbmA with its "outer door" open.
https://phys.org/news/2026-04-bacteria-door-revealed-antimic…
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web search NEUTRAL — However, it remains unclear, if SbmA also shares the mechanism of alternating access with ABC transporters, because only a single (outward-open) state is resolved.
https://www.nature.com/articles/s41467-026-71633-3
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“This new study goes further by using advanced structural approaches to identify several new structures of SbmA, including forms in which the 'inner door' is open”
SINGLE SOURCE
While the general topic of SbmA structures is discussed, the specific claim about identifying 'inner door' open structures in this 'new study' is not clearly corroborated by multiple independent sources in the provided evidence; some results discuss general structural similarities but not the specific 'inner door' discovery of the cited study.
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web search NEUTRAL — Other manifestations of SBMA include androgen insensitivity (gynecomastia, erectile dysfunction, reduced fertility, testicular atrophy), and metabolic impacts (glucose resistance, hyperlipidemia, fatt…
https://en.wikipedia.org/wiki/Spinal_and_bulbar_muscular_atr…
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web search NEUTRAL — The SbmA structure can fit in the BacA map without any structural changes, including the TM0 domain, suggesting that BacA also adopts an outward-open conformation.
https://pmc.ncbi.nlm.nih.gov/articles/PMC8442886/
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web search NEUTRAL — Comparisons with the inward-open MsbA and outward-open Sav1866 structures show that McjD has structural similarities with both states without the intertwining of transmembrane (TM) helices.
https://www.academia.edu/111846596/Molecular_mechanism_of_Sb…
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“Thijs W. Ettema et al, Shared structural mechanisms of alternating access between the secondary peptide transporter SbmA and ABC transporters, Nature Communications (2026). DOI: 10.1038/s41467-026-71633-3”
SINGLE SOURCE
The provided evidence for this claim consists of generic Wikipedia entries about 'Paper' and 'Paper.io 2'. There is no evidence in the provided text confirming the existence of the specific paper by Thijs W. Ettema et al in Nature Communications (2026).
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web search NEUTRAL — Paper is a thin sheet of matted cellulose fibers. Largely derived from lignocellulose, paper is created from a pulp dissolved into a slurry that is drained and dried into sheets. Different types of pa…
https://en.wikipedia.org/wiki/Paper
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web search NEUTRAL — High-impact tutoring focused on instructional continuity, classroom-aligned curriculum, and consistent tutors—backed by NSSA and ESSA Level III evidence.
https://paper.co/
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web search NEUTRAL — Paper.io 2 is a sequel to what might be the most popular mobile game played by people from all around the world. Its simple premise, flawless execution and great optimization made it extremely appeali…
https://paperio.site/
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.