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Open data
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Basic information
Entry | Database: PDB / ID: 6zzz | ||||||
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Title | Crystal structure of yeast Sec62 cytoplasmic domain | ||||||
![]() | Translocation protein SEC62 | ||||||
![]() | PROTEIN TRANSPORT / Sec62 / Sec62 domain / Post translocon | ||||||
Function / homology | ![]() Sec62/Sec63 complex / translocon complex / rough endoplasmic reticulum membrane / post-translational protein targeting to membrane, translocation / protein transmembrane transporter activity / endoplasmic reticulum / membrane Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Cheng, J. / Beckmann, R. | ||||||
![]() | ![]() Title: Architecture of the active post-translational Sec translocon. Authors: Tsai-Hsuan Weng / Wieland Steinchen / Birgitta Beatrix / Otto Berninghausen / Thomas Becker / Gert Bange / Jingdong Cheng / Roland Beckmann / ![]() Abstract: In eukaryotes, most secretory and membrane proteins are targeted by an N-terminal signal sequence to the endoplasmic reticulum, where the trimeric Sec61 complex serves as protein-conducting channel ...In eukaryotes, most secretory and membrane proteins are targeted by an N-terminal signal sequence to the endoplasmic reticulum, where the trimeric Sec61 complex serves as protein-conducting channel (PCC). In the post-translational mode, fully synthesized proteins are recognized by a specialized channel additionally containing the Sec62, Sec63, Sec71, and Sec72 subunits. Recent structures of this Sec complex in the idle state revealed the overall architecture in a pre-opened state. Here, we present a cryo-EM structure of the yeast Sec complex bound to a substrate, and a crystal structure of the Sec62 cytosolic domain. The signal sequence is inserted into the lateral gate of Sec61α similar to previous structures, yet, with the gate adopting an even more open conformation. The signal sequence is flanked by two Sec62 transmembrane helices, the cytoplasmic N-terminal domain of Sec62 is more rigidly positioned, and the plug domain is relocated. We crystallized the Sec62 domain and mapped its interaction with the C-terminus of Sec63. Together, we obtained a near-complete and integrated model of the active Sec complex. | ||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 79.9 KB | Display | ![]() |
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PDB format | ![]() | 52.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 475.4 KB | Display | ![]() |
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Full document | ![]() | 482.2 KB | Display | |
Data in XML | ![]() | 14.4 KB | Display | |
Data in CIF | ![]() | 18.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments:
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Components
#1: Protein | Mass: 15170.269 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: SEC62, YPL094C, LPG14C / Production host: ![]() ![]() #2: Chemical | #3: Chemical | ChemComp-SO4 / #4: Chemical | ChemComp-MES / | #5: Water | ChemComp-HOH / | Has ligand of interest | N | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 3.64 Å3/Da / Density % sol: 66.25 % |
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Crystal grow | Temperature: 277 K / Method: vapor diffusion, hanging drop / Details: 100mM MES pH 5.7-5.9, 2 M (NH4)2SO4 / PH range: 5.7-5.9 |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS EIGER X 16M / Detector: PIXEL / Date: May 19, 2017 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.97958 Å / Relative weight: 1 |
Reflection | Resolution: 2.54→47.26 Å / Num. obs: 15563 / % possible obs: 99.81 % / Redundancy: 38.1 % / Biso Wilson estimate: 74.11 Å2 / CC1/2: 1 / CC star: 1 / Rmerge(I) obs: 0.1075 / Rpim(I) all: 0.01778 / Rrim(I) all: 0.109 / Net I/σ(I): 26.56 |
Reflection shell | Resolution: 2.54→2.63 Å / Rmerge(I) obs: 1.869 / Mean I/σ(I) obs: 2.03 / Num. unique obs: 1495 / CC1/2: 0.949 / Rrim(I) all: 1.894 |
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Processing
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Refinement | Method to determine structure: ![]() Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
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Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 75.34 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 2.54→47.26 Å
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Refine LS restraints |
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LS refinement shell |
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