(Microbial infection) In case of infection by polyomavirus, involved in the virus endoplasmic reticulum membrane penetration and infection . Regulates the recruitment of DNAJB12:DNAJB14 into SV40-induced foci and all cooperate to guide SV40 across the endoplasmic reticulum membrane. The foci represent the site from which SV40 penetrates into the cytosol .
Subcellular locations: Endoplasmic reticulum membrane
(Microbial infection) Upon SV40 infection, colocalizes with BCAP31, DNAJB12 and DNAJB14 in punctate structures within the endoplasmic reticulum membrane.