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2.A.87.1.4
The riboflavin transporter of 203 aas and 5 TMSs, RibU or EcfS. Mediates riboflavin and maybe also FMN, FAD and roseoflavin uptake (and efflux) (Light et al. 2018). Interacts with the energy-coupling factor (ECF) module, EcfAA'T, which energizes transport of a number of different substrates, each with its own EcfS subunit.  Does not use an extracytoplasmic receptor (Karpowich et al. 2015). It provides extracellur FAD for an extracellular electron transfer process in firmicutes (Light et al. 2018).

Accession Number:Q8Y5W0
Protein Name:Riboflavin transporter
Length:203
Molecular Weight:22654.00
Species:Listeria monocytogenes serovar 1/2a (strain ATCC BAA-679 / EGD-e) [169963]
Number of TMSs:5
Location1 / Topology2 / Orientation3: Cell membrane1
Substrate riboflavin

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FASTA formatted sequence
1:	MKNYSMKVFV SVAVLGTLAF ILMMLQFPLL PSAPFLKLDF SDIPALIGGL LFGPLAVILV 
61:	ELIKNVLLYI VSGSPVGVPV GELANFISGL FYVLPIYYLF HWLRSTKGMV LSTAVGTVLM 
121:	TGAMAVFNYF VLLPFYIKLG GLPANTDVAW LITYAIVPFN LLKGVIVSAV FLLLYSRLKK 
181:	WIAKNQTMKE RRKFEKRQQE ISH