J. A. Gralnick

Prophage regulation of Shewanella fidelis 3313 motility and biofilm formation: implications for gut colonization dynamics in Ciona robusta

This study shows that the prophage SfPat in Shewanella fidelis 3313 affects motility, biofilm formation, and host immune responses in Ciona robusta.

Evidence for quinol oxidase activity of ImoA, a novel NapC/NirT family protein from the neutrophilic Fe(II) oxidizing bacterium Sideroxydans lithotrophicus ES-1

This study characterizes ImoA, a NapC/NirT family cytochrome from Sideroxydans lithotrophicus ES-1, showing it functions as a quinol oxidase and can replace CymA in electron transfer.

Light-induced Patterning of Electroactive Bacterial Biofilms

This paper develops a light-induced genetic circuit to pattern electroactive Shewanella oneidensis biofilms on electrodes, enabling tunable conductivity and confirming a collision-exchange electron transport mechanism.

Iron oxidation is regulated by the two-component system, RegSR, and plays a role in photolithoheterotrophic growth in Rhodopseudomonas palustris

This study shows RegSR regulates Fe(II) oxidation in R. palustris, enabling photolithoheterotrophic growth using Fe(II) under specific conditions.

Engineering lithoheterotrophy in an obligate chemolithoautotrophic Fe(II) oxidizing bacterium

This paper develops a genetic system in Mariprofundus ferrooxydans to engineer lithoheterotrophy, demonstrating energy generation from carbon oxidation in an obligate chemolithoautotroph.

Extracellular electron transfer-dependent anaerobic oxidation of ammonium by anammox bacteria

This study demonstrates that freshwater and marine anammox bacteria can couple ammonium oxidation with extracellular electron transfer to carbon-based electron acceptors like graphene oxide or electrodes.

Tracking electron uptake from a cathode into Shewanella cells: implications for generating maintenance energy from solid substrates.

This study shows that Shewanella oneidensis MR-1 can take up electrons from a cathode, generating ATP and reducing cellular decay rate, suggesting a mechanism for energy conservation in low-growth environments.