Journal of Bacteriology, January 2000, p. 241-243, Vol. 182, No. 1
0021-9193/0/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Instituto de Investigaciones Biomédicas "Alberto Sols," Consejo Superior de Investigaciones Científicas, 28029 Madrid, Spain
Received 21 July 1999/Accepted 8 October 1999
Monoubiquitination of the 12-transmembrane segment (12-TMS)
Saccharomyces cerevisiae maltose transporter promoted the
maximal internalization rate of this protein. This modification is
similar to that of the 7-TMS
-factor receptor but different from
that of the 12-TMS uracil and general amino acid permeases. This result shows that binding of ubiquitin-Lys63 chains is not required for maximal internalization of all 12-TMS-containing proteins.
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