Membrane Insertases Are Present in All Three Domains of Life.

In this issue of Structure, Borowska et al. (2015) report the crystal structure and provide experimental evidence on an archaeal membrane insertase, the DUF106 protein from Methanocaldococcus jannaschii, demonstrating that YidC/Oxa1/Alb3-like insertases exist in the archaeal plasma membrane.

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