BMAC Weekly — 2026-W40
8 papers selected for 2026-W40.
2026-09-22–2026-09-28 · 8 papers
Firewalled synthetic commensal blocks horizontal gene transfer in the gut
Eric Hu, Kathryn Gorman Durben, Bogdan Budnik, Daniel H. Arlow, Sungwhan F. Oh, Ákos Nyerges
2026-09-18 · bioRxiv
TL;DR. A genetically firewalled E. coli commensal was engineered by reassigning TCA and TCG serine codons, then evolved and rationally redesigned for high fitness.
Key signal. The firewalled strain remained stable for thousands of generations, colonized the mouse gut for over 100 days, and blocked viral infection and horizontal gene transfer; adaptive mutations in carbon-source utilization genes guided genome redesign that increased fitness.
Why it matters here. Directly ties to Fangzhou's interests in synthetic and growing cells, microbial population dynamics, and proteome-level fitness constraints: codon reassignment imposes a global reallocation of translational resources whose fitness cost was mitigated by carbon-metabolism mutations.
Gene expression noise is reduced in communicating synthetic cell populations
Naresh Yadrapalli, David T. Gonzales, T-Y Dora Tang
2026-09-25 · bioRxiv (Cold Spring Harbor Laboratory)
TL;DR. Lux and Las quorum-sensing circuits encapsulated in lipid vesicles under cell-free conditions were used to test whether communication reduces gene expression variability across synthetic cell populations.
Key signal. Communication, limiting expression resources, and membrane surface effects reduced cell-free gene expression variability, and resource-limited Gillespie simulations showed communication-mediated coupling lowers population-level expression noise under both constrained and excess resource conditions.
Why it matters here. Connects to Fangzhou's work on synthetic biology circuits and microbial decision-making: quorum-sensing coupling acts as a concrete intercellular feedback mechanism that suppresses noise in gene expression, relevant to how growing cell populations stabilize division and fate decisions.
Microbial community structure and antibiotic resistance genes in Dinaric karst groundwater under contrasting hydrological conditions
A. Puljko, L. Weisse, M. Ujević Bošnjak, J. Štiglić, A. Maravić, N. Udikovic-Kolic
2026-09-23 · Journal of Hazardous Materials
TL;DR. Microbial community composition and antibiotic resistance gene profiles were surveyed in five Dinaric karst groundwater sources under contrasting hydrological conditions.
Key signal. Hydrological conditions were associated with community composition, total organic carbon was associated with community structure, and sites with greater anthropogenic influence had higher ARG abundances, with efflux pump genes prevalent and clinically relevant vancomycin and colistin resistance genes detected at low relative abundance.
Why it matters here. Ties to Fangzhou's interests in antibiotic resistance and microbial community ecology: the resistome profiles link environmental selection, community structure, and mobile resistance determinants in a natural microbial population.
Antibiotic Resistance: Mechanisms of Drug Failure and Role of Molecular Docking in Antibiotic Development
Irem Ünlü
2026-09-01 · Oxford Journal of Student Scholarship
TL;DR. A review describes antibiotic targets and bacterial resistance mechanisms and illustrates molecular docking of ciprofloxacin with E. coli DNA gyrase B using SwissDock.
Key signal. The docking simulation of ciprofloxacin with E. coli DNA gyrase B showed favorable binding scores and specific interaction distances within the target binding pocket, presented as an example of structure-based pre-screening.
Why it matters here. Connects to Fangzhou's interests in binding and catalysis and antibiotic resistance: the review frames drug-target binding energetics and resistance mechanisms such as target modification and efflux at the level of protein-ligand interactions.
Bacterial Community Assembly Patterns Across Distinct Freshwater Habitats
S Li, Z Wang, X Xie, X Xu, M Wang, T Yi, Z Shen, P Wu…
2026-01-01 · Biology
TL;DR. The abstract was unavailable and only metadata were supplied for this study on bacterial community assembly patterns across distinct freshwater habitats.
Why it matters here. If it examines assembly mechanisms in freshwater bacterial communities, it would connect to Fangzhou's work on microbial population dynamics and community ecology, but no abstract was available to confirm the specific mechanism or system.
Synthetic microbial communities for plant growth promotion and soil-borne disease suppression: design principles, mechanisms, and translational challenges
Peiwen Cai, Fengjuan Zhao, Ziguo Zhao, Xiancui Zhang, Choufei Wu
2026-09-18 · Frontiers in Microbiology
TL;DR. A review critically examines design principles, mechanisms, and translational challenges for synthetic microbial communities used in plant growth promotion and soil-borne disease suppression.
Key signal. No single SynCom construction strategy is universally superior; robust design requires integrated, context-specific combinations of core-microbiome mining, trait-based screening, interaction-informed assembly, and model-guided optimization.
Why it matters here. Directly relevant to Fangzhou's interests in community ecology and synthetic communities: the review synthesizes mechanisms such as resource competition, niche pre-emption, antibiosis, and immune priming that determine whether designed consortia establish and persist.
Microbial community dynamics in a traditional Swiss mountain cheese over 142 years of cheesemaking
Vincent Somerville, Marco Meola, Abigail Nunes-Richards, Johan Bengtsson-Palme, Judith Neukamm, Kerttu Majander, Marta Pla-Díaz, Meral Turgay, Sylvain Moineau, Monika Haueter, Hélène Berthoud, Ueli von Ah, Petra Lüdin, Verena J. Schuenemann, Noam Shani
2026-09-01 · Current Biology
TL;DR. Shotgun metagenomics and 16S rRNA amplicon sequencing were used to track microbial community changes in Raclette du Valais cheese wheels preserved from 1875 to 2017 at the same Alpine dairy.
Key signal. Microbial community composition shifted with production practices, the oldest cheese harbored a distinct community dominated by Lactiplantibacillus paraplantarum, Streptococcus thermophilus, Pseudolactococcus laudensis, and gut-associated taxa, antibiotic-resistance genes mirrored historical antibiotic use, and bacteriophage genera from 1875 were already comparable to modern cheese factories.
Why it matters here. Ties to Fangzhou's interests in fermentation ecology and long-term microbial population dynamics: the 142-year series shows how human production practices reshape a stable food-fermentation community and its resistome over time.
Microbiome Dynamics During Translocation of the Critically Endangered Frog Craugastor ranoides
Xavier A. Harrison, Katherine Herborn, Gilbert Alvarado, María Marta Chavarría, Kirsty J. Marsh, Alexander D. M. Wilson, Alexandra C. North, Victoria EP Wakeham, Roberto Fernández, Héctor Zumbado‐Ulate, Jon Bielby, Robert Puschendorf
2026-09-22 · Animal Conservation
TL;DR. Skin microbiome composition and predicted function were surveyed across populations of the critically endangered frog Craugastor ranoides and tracked after translocation to a new site.
Key signal. Among-population variation in skin microbiome composition was limited, but individual responses to translocation were highly variable, with some frogs showing stable richness and composition while others showed marked turnover in bacterial membership and predicted function, alongside individual-level body mass changes.
Why it matters here. Relevant to Fangzhou's interest in host-associated microbial community ecology: it documents how a disturbance event reshapes skin bacterial communities that mediate host protection against pathogens, with individual-level heterogeneity in community stability.