Magnetotactic bacteria from diverse Pseudomonadota families biomineralize intracellular Ca-carbonate

The ISME Journal, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

Язык: Английский

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Diel changes in the expression of a marker gene and candidate genes for intracellular amorphous CaCO3 biomineralization in Microcystis

Peer Community Journal, Год журнала: 2025, Номер 5

Опубликована: Фев. 6, 2025

Язык: Английский

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Biogenic pyrite and metastable iron sulfides: Emerging formation pathways and geological and societal relevance

Deleted Journal, Год журнала: 2025, Номер 2

Опубликована: Янв. 1, 2025

Abstract Iron sulfide (Fe-S) minerals such as mackinawite (FeS), greigite (Fe 3 S 4 ) and pyrite (FeS 2 are widespread on Earth, where their formation dissolution strongly linked to the biogeochemical cycles of iron, sulfur, carbon, oxygen, nutrients trace metals. Recent studies have shed light how microorganisms mediate formation, with breakthroughs biogenic pyrite. In this review, we highlight pathways Fe-S minerals, starting increasingly recognized roles Fe(III) intermediate sulfur species ( e.g. 0 polysulfides) during initial steps. The mechanisms by which affect mineral compiled discussed for low (25–35°C) high (≥ 80°C) temperatures, specific examples from experimental studies. morphology precipitation rates obtained experiments compared natural environments, similarities differences critically discussed. We then review current state art in context origin life environmental proxies biosignatures geological record using texture chemical isotopic compositions. end highlighting importance societal issues, sequestration organic acid drainages, metal recovery nitrate removal, potential use technological bio-materials future.

Язык: Английский

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Population-level control of two manganese oxidases expands the niche for bacterial manganese biomineralization

npj Biofilms and Microbiomes, Год журнала: 2025, Номер 11(1)

Опубликована: Март 24, 2025

Abstract The enzymatic oxidation of aqueous divalent manganese (Mn) is a widespread microbial trait that produces reactive Mn(III, IV) oxide minerals. These biominerals drive carbon, nutrient, and trace metal cycles, thus playing important environmental ecological roles. However, the regulatory mechanisms physiological functions Mn biomineralization are unknown. This challenge arises from common occurrence multiple oxidases within same organism use oxides as indicators combined gene activity. Through detection activation in individual cells, we discover expression mnxG mcoA , two oxidase-encoding genes Pseudomonas putida GB-1, confined to subsets cells population, with each showing distinct spatiotemporal patterns reflect local microenvironments. coordinated intra-population dynamics control illuminate strategies used by communities dictate extent, location, timing biogeochemical transformations.

Язык: Английский

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Organics Guide Non-Classical Crystallization Of Bacterial Calcite Which Parallels Eukaryotic Biomineralization

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

Abstract Microbially-induced calcium carbonate precipitation is a widespread natural phenomenon with numerous applications. Recent advances have shown that bacterial carbonates (BCC) form non-classically via amorphous (ACC) precursors in the presence of organics, but role organics formation and nanostructural features BCCs not fully understood. Here we show different strains produce diverse textural structural at macroscale similar micro nanoscale. We guide calcite, stabilizing ACC to nanogranular crystals these are then trapped within crystal, rather than being released as previously suggested. These N-rich create regions low Z-contrast aligned perpendicular c -axis yielding “Swiss cheese-like” mesostructure. Moreover, it occluded lead distinctive biosignatures observed BCC. Finally, also observe crystalline 2D-structures made up self-assembled proteins templating oriented crystallization calcite. The mechanism resulting BCC strikingly those biominerals formed by eukaryotic organisms controlled biomineralization, suggesting common origin for this crucial biomineralization process.

Язык: Английский

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Bioavailability, migration and driving factors of As, Cd and Pb in calcareous soil amended with organic fertilizer and manganese oxidizing bacteria in arid northwest China

Journal of Hazardous Materials, Год журнала: 2025, Номер 489, С. 137528 - 137528

Опубликована: Фев. 7, 2025

Язык: Английский

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The search for ancient life on Mars using morphological and mass spectrometric analysis: an analog study in detecting microfossils in Messinian gypsum

Frontiers in Astronomy and Space Sciences, Год журнала: 2025, Номер 12

Опубликована: Фев. 25, 2025

Hydrated sulfate deposits have been detected on Mars. A spaceflight instrument capable of detecting microfossils in these salt is highly important for the search ancient life This study employed a range analytical methods, including nondestructive optical microscopy and SEM-EDX, as well spatially resolved laser ablation mass spectrometry (LIMS), latter being designed in-situ analyses planetary surfaces, to comprehensively examine morphology, texture, mineralogy, geochemistry fossil-bearing gypsum from Algeria. These extensive formations formed during Messinian Salinity Crisis (MSC) serve excellent astrobiological analogs large-scale hydrated Significant research reveals notable microbial fossil filaments. aims determine whether LIMS measurements together can detect filaments samples, identify their composition, decipher biogenicity syngeneity. Spatially depth profiling chemical mapping analysis one representative filament using provided detailed mineralogical compositional variations that correlate with distinctive morphological features. findings collectively indicate exhibits distinct composition diagenetic processes comparison surrounding host. The microfossil’s syngeneity were established based presence biosignatures, biologically relevant elements, induced or influenced minerals such dolomite clay minerals. formation within physico-chemical context Martian lakes was also discussed. same suite techniques could be applied microfossil-bearing Mars beyond.

Язык: Английский

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Biomineralization

Опубликована: Апрель 4, 2025

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Interplay between arsenic and selenium biomineralization in Shewanella sp. O23S

Environmental Pollution, Год журнала: 2022, Номер 306, С. 119451 - 119451

Опубликована: Май 11, 2022

Bacteria play crucial roles in the biogeochemical cycle of arsenic (As) and selenium (Se) as these elements are metabolized via detoxification, energy generation (anaerobic respiration) biosynthesis (e.g. selenocysteine) strategies. To date, biomineralization bacteria were studied separately. In this study, anaerobic metabolism As Se Shewanella sp. O23S was investigated separately mixed, with an emphasis put on products process. Multiple analytical techniques including ICP-MS, TEM-EDS, XRD, Micro-Raman, spectrophotometry surface charge (zeta potential) employed. is capable reducing selenate (SeO42-) selenite (SeO32-) to red Se(-S)0, arsenate (AsO43-) arsenite (AsO33-). The release H2S from cysteine led precipitation AsS minerals: nanorod granular As2S3. When oxyanions both As-S Se(-S)0 biominerals synthesized. All extracellular, amorphous presented a negative (-24 -38 mV). Kinetic analysis indicated following reduction yields: SeO32- (90%), AsO43- (60%), SeO42- (<10%). mix decrease removal 30%, while yield unaffected (88%). Interestingly, incubated boosted (71%). exclusive extracellular formation might indicate respiratory process characteristic various species strains. This first study documenting complex interplay between oxyanions: decreased reduction, whereas stimulated reduction. Further investigation needs clarify whether employs multi-substrate enzymes or separate, high affinity for oxyanion respiration.

Язык: Английский

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Biomineralization of amorphous Fe-, Mn- and Si-rich mineral phases by cyanobacteria under oxic and alkaline conditions

Biogeosciences, Год журнала: 2023, Номер 20(19), С. 4183 - 4195

Опубликована: Окт. 12, 2023

Abstract. Iron and manganese are poorly soluble elements in oxic alkaline solutions, whereas they much more under anoxic conditions. As a result, the formation of authigenic mineral phases rich Fe and/or Mn has traditionally been viewed as diagnostic global or local Here we reveal that some specific cyanobacteria very small size (< 2 µm, i.e., picocyanobacteria) can biomineralize abundant, Fe(III)-, Mn(IV)- Si-rich amorphous conditions an lake Mexico. The resulting biominerals cluster globules arranged rings around division septum cyanobacterial cells. These enveloped within organic, likely polysaccharidic envelope partially preserved, at least morphologically, upon sedimentation. Based on their 16S rDNA sequence, these were affiliated with Synechococcales order. high enrichment questions systematic inference based detection. Moreover, this process scavenges iron from water column, overlooked biological contribution to cycle. Finally, it reveals new case controlled biomineralization by bacteria.

Язык: Английский

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