Journal
FEBS LETTERS
Volume 591, Issue 20, Pages 3211-3224Publisher
WILEY
DOI: 10.1002/1873-3468.12831
Keywords
endoplasmic reticulum; HSND2; protein targeting; signal recognition particle; SRP independent; transmembrane recognition complex
Funding
- Israeli Science Foundation [791/14]
- DFG
- HOMFOR
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Recently, understanding of protein targeting to the endoplasmic reticulum (ER) was expanded by the discovery of multiple pathways that function in parallel to the signal recognition particle (SRP). Guided entry of tail-anchored proteins and SRP independent (SND) are two such targeting pathways described in yeast. So far, no human SND component is functionally characterized. Here, we report hSnd2 as the first constituent of the human SND pathway able to support substrate-specific protein targeting to the ER. Similar to its yeast counterpart, hSnd2 is assumed to function as a membrane-bound receptor preferentially targeting precursors carrying C-terminal transmembrane domains. Our genetic and physical interaction studies show that hSnd2 is part of a complex network of targeting and translocation that is dynamically regulated.
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