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VUT family protein
7-cyano-7-deazaguanine/7-aminomethyl-7-deazaguanine transporter
7-cyano-7-deazaguanine/7-aminomethyl-7-deazaguanine transporter is a VUT (Vitamin Uptake Transporter) family protein involved in the import of queuosine (Q) precursors
queuosine precursor transporter
YhhQ from Escherichia coli became the first characterized member of the TIGR00697 family of integral membrane proteins when it was shown to be able to import the queuosine precursor 7-cyano-7-deazaguanine (preQ0), and to a lesser extent 7-aminomethyl-7-deazaguanine (preQ1). The activity was suspected, prior to its experimental degradation, because this family of transporters is regularly found in bacteria that have an incomplete (salvage-only) queuosine biosynthetic pathway instead of the full biosynthetic pathway.
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