Chaperoning the major facilitator superfamily at single-molecule level.

ABSTRACT

In this issue of Structure, Blaimschein et al. elucidate the chaperoning function of the insertase YidC during the insertion and folding of the melibiose permease MelB. Their single-molecule forced unfolding approach reveals that YidC significantly reduces the misfolding and enhances the folding of helices near the interface of two folding cores.