Cysteine residues in the transmembrane (TM) 9 to TM11 region of the human equilibrative nucleoside transporter subtype 1 play an important role in inhibitor binding and translocation function.

Abstract excerpt

Inhibitor and substrate interactions with equilibrative nucleoside transporter 1 (ENT1; SLC29A1) are known to be affected by cysteine-modifying reagents. A previous study from our laboratory established Cys222 in transmembrane (TM) 6 as the residue responsible for methyl methanethiosulfonate (a membrane-permeable sulfhydryl modifier)-mediated enhancement of the binding of the ENT1 inhibitor...

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