Patients with PNTM have more low-frequency, protein-affecting variants in immune, CFTR, cilia, and connective tissue genes than their unaffected family members and control subjects. We propose that PNTM infection is a multigenic disease in which combinations of variants across gene categories, plus environmental exposures, increase susceptibility to the infection.

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Here we show that the Slx5/Slx8 STUbL complex is involved in the efficient degradation of the nuclear pool of Siz1, a SUMO E3 ligase with many nuclear and cytosolic substrates. This novel finding suggests that STUbLs can regulate cellular SUMO homeostasis by targeting SUMO E3 ligases.