In gram-negative bacteria, when nutrients are too large or too scarce to diffuse through outer membrane porins, TonB-dependent receptors (TBDRs) are utilized to actively translocate substrates across the outer membrane. is a gram-negative bacterium with a large set of TBDRs, many which have not been fully characterized. Previous studies identified SucA, a TBDR that transports sucrose. Our experiments further characterize the expression of from the promoter and we identify as a tightly controlled, tunable promoter, responsive to changes in sucrose concentration with and without other carbon sources in the media.
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| http://dx.doi.org/10.17912/micropub.biology.001458 | DOI Listing |
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