Apratoxin Kills Cells by Direct Blockade of the Sec61 Protein Translocation Channel
نویسندگان
چکیده
منابع مشابه
Apratoxin Kills Cells by Direct Blockade of the Sec61 Protein Translocation Channel.
Apratoxin A is a cytotoxic natural product that prevents the biogenesis of secretory and membrane proteins. Biochemically, apratoxin A inhibits cotranslational translocation into the ER, but its cellular target and mechanism of action have remained controversial. Here, we demonstrate that apratoxin A prevents protein translocation by directly targeting Sec61α, the central subunit of the protein...
متن کاملProtein translocation by the Sec61/SecY channel.
The conserved protein-conducting channel, referred to as the Sec61 channel in eukaryotes or the SecY channel in eubacteria and archaea, translocates proteins across cellular membranes and integrates proteins containing hydrophobic transmembrane segments into lipid bilayers. Structural studies illustrate how the protein-conducting channel accomplishes these tasks. Three different mechanisms, eac...
متن کاملProtein translocation through the Sec61/SecY channel.
Special codes are embedded in the primary sequence of newly synthesized proteins to determine their final destination. Protein translocation across biological membranes requires co-operation between the targeting and translocation machineries. A conserved membrane channel, the Sec61/SecY complex, mediates protein translocation across or integration into the endoplasmic reticulum membrane in euk...
متن کاملProtein Translocation: The Sec61/SecYEG Translocon Caught in the Act
The Sec61/SecYEG complex mediates both the translocation of newly synthesized proteins across the membrane and the integration of transmembrane segments into the lipid bilayer. New cryo-electron microscopy studies show ribosome-channel complexes in action and reveal their repertoire of conformational states.
متن کاملStructure of the native Sec61 protein-conducting channel
In mammalian cells, secretory and membrane proteins are translocated across or inserted into the endoplasmic reticulum (ER) membrane by the universally conserved protein-conducting channel Sec61, which has been structurally studied in isolated, detergent-solubilized states. Here we structurally and functionally characterize native, non-solubilized ribosome-Sec61 complexes on rough ER vesicles u...
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ژورنال
عنوان ژورنال: Cell Chemical Biology
سال: 2016
ISSN: 2451-9456
DOI: 10.1016/j.chembiol.2016.04.008