Menetret JF, et al. (2000) The structure of ribosome-channel complexes engaged in protein translocation. Mol Cell 6(5):1219-32
Abstract: Cotranslational translocation of proteins requires ribosome binding to the Sec61p channel at the endoplasmic reticulum (ER) membrane. We have used electron cryomicroscopy to determine the structures of ribosome-channel complexes in the absence or presence of translocating polypeptide chains. Surprisingly, the structures are similar and contain 3-4 connections between the ribosome and channel that leave a lateral opening into the cytosol. Therefore, the ribosome-channel junction may allow the direct transfer of polypeptides into the channel and provide a path for the egress of some nascent chains into the cytosol. Moreover, complexes solubilized from mammalian ER membranes contain an additional membrane protein that has a large, lumenal protrusion and is intercalated into the wall of the Sec61p channel. Thus, the native channel contains a component that is not essential for translocation.
| Status: Published | Type: Journal Article | Research Support, U.S. Gov't, P.H.S. | PubMed ID: 11106759 |
Topics addressed in this paper
Number of different genes curated to this paper: 91
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| Topics | Genes linked to topics (#1 - 10 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| HEF3 | RDN18-1 | RDN18-2 | RDN25-1 | RDN25-2 | RDN5-1 | RDN5-2 | RDN5-3 | RDN5-4 | RDN5-5 | |
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| Topics | Genes linked to topics (#11 - 20 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RDN5-6 | RDN58-1 | RDN58-2 | RPL10 | RPL11A | RPL11B | RPL13B | RPL15A | RPL15B | RPL16B | |
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| Protein/Nucleic Acid Structure | | | | | | | | | | |
| Topics | Genes linked to topics (#21 - 30 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RPL17B | RPL18A | RPL18B | RPL1A | RPL20A | RPL20B | RPL21B | RPL22A | RPL22B | RPL24B | |
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| Cellular Location | | | | | | | | | | |
| Protein-protein Interactions | | | | | | | | | | |
| Protein/Nucleic Acid Structure | | | | | | | | | | |
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| Topics | Genes linked to topics (#31 - 40 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RPL25 | RPL26A | RPL29 | RPL3 | RPL31B | RPL33A | RPL33B | RPL36A | RPL36B | RPL37A | |
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| Topics | Genes linked to topics (#41 - 50 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RPL38 | RPL39 | RPL42A | RPL43A | RPL43B | RPL5 | RPL6A | RPL6B | RPL7B | RPL8B | |
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| Protein/Nucleic Acid Structure | | | | | | | | | | |
| Topics | Genes linked to topics (#51 - 60 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RPL9B | RPP0 | RPP2A | RPS0A | RPS0B | RPS10A | RPS10B | RPS12 | RPS14B | RPS15 | |
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| Cellular Location | | | | | | | | | | |
| Protein-protein Interactions | | | | | | | | | | |
| Protein/Nucleic Acid Structure | | | | | | | | | | |
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| Topics | Genes linked to topics (#61 - 70 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RPS16A | RPS17A | RPS18B | RPS19A | RPS19B | RPS1A | RPS1B | RPS21B | RPS22A | RPS22B | |
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| Protein/Nucleic Acid Structure | | | | | | | | | | |
| Topics | Genes linked to topics (#71 - 80 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RPS23A | RPS23B | RPS25B | RPS28A | RPS28B | RPS29A | RPS3 | RPS30A | RPS30B | RPS31 | |
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| Cellular Location | | | | | | | | | | |
| Protein-protein Interactions | | | | | | | | | | |
| Protein/Nucleic Acid Structure | | | | | | | | | | |
| Topics | Genes linked to topics (#81 - 90 ) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RPS4A | RPS5 | RPS6A | RPS7A | RPS7B | RPS9A | SBH1 | SEC61 | SSS1 | TIF5 | |
| Additional Literature | | | | | | | | | | |
| Cellular Location | | | | | | | | | | |
| Protein-protein Interactions | | | | | | | | | | |
| Protein/Nucleic Acid Structure | | | | | | | | | | |
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| Topics | Genes linked to topics (#91 ) |
|---|---|
| YEF3 | |
| Additional Literature | |
| Cellular Location | |
| Protein-protein Interactions | |
| Protein/Nucleic Acid Structure | |




