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- PDB-7e4i: Cryo-EM structure of the yeast mitochondrial SAM-Tom40/Tom5/Tom6 ... -
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Open data
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Basic information
Entry | Database: PDB / ID: 7e4i | ||||||
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Title | Cryo-EM structure of the yeast mitochondrial SAM-Tom40/Tom5/Tom6 complex at 3.0 angstrom | ||||||
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![]() | TRANSLOCASE | ||||||
Function / homology | ![]() mitochondrial outer membrane translocase complex assembly / SAM complex / membrane insertase activity / mitochondrial outer membrane translocase complex / mitochondrial respiratory chain complex assembly / protein import into mitochondrial matrix / phospholipid transport / protein targeting to mitochondrion / protein insertion into mitochondrial outer membrane / porin activity ...mitochondrial outer membrane translocase complex assembly / SAM complex / membrane insertase activity / mitochondrial outer membrane translocase complex / mitochondrial respiratory chain complex assembly / protein import into mitochondrial matrix / phospholipid transport / protein targeting to mitochondrion / protein insertion into mitochondrial outer membrane / porin activity / pore complex / protein transmembrane transporter activity / monoatomic ion transport / mitochondrion organization / mitochondrial intermembrane space / protein-containing complex assembly / mitochondrial outer membrane / mitochondrion / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.05 Å | ||||||
![]() | Wang, Q. / Guan, Z.Y. / Qi, L.B. / Yan, C.Y. / Yin, P. | ||||||
![]() | ![]() Title: Structural insight into the SAM-mediated assembly of the mitochondrial TOM core complex. Authors: Qiang Wang / Zeyuan Guan / Liangbo Qi / Jinjin Zhuang / Chen Wang / Sixing Hong / Ling Yan / Yan Wu / Xiaoqian Cao / Jianbo Cao / Junjie Yan / Tingting Zou / Zhu Liu / Delin Zhang / Chuangye Yan / Ping Yin / ![]() Abstract: β barrel outer membrane proteins (β-OMPs) play vital roles in mitochondria, chloroplasts, and Gram-negative bacteria. Evolutionarily conserved complexes such as the mitochondrial sorting and ...β barrel outer membrane proteins (β-OMPs) play vital roles in mitochondria, chloroplasts, and Gram-negative bacteria. Evolutionarily conserved complexes such as the mitochondrial sorting and assembly machinery (SAM) mediate the assembly of β-OMPs. We investigated the SAM-mediated assembly of the translocase of the outer membrane (TOM) core complex. Cryo–electron microscopy structures of SAM–fully folded Tom40 and the SAM-Tom40/Tom5/Tom6 complexes at ~3-angstrom resolution reveal that Sam37 stabilizes the mature Tom40 mainly through electrostatic interactions, thus facilitating subsequent TOM assembly. These results support the β barrel switching model and provide structural insights into the assembly and release of β barrel complexes. | ||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 265.2 KB | Display | ![]() |
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PDB format | ![]() | 207.7 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 861.4 KB | Display | ![]() |
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Full document | ![]() | 871.1 KB | Display | |
Data in XML | ![]() | 40 KB | Display | |
Data in CIF | ![]() | 61.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 30986MC ![]() 7e4hC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Sorting assembly machinery ... , 3 types, 3 molecules ABC
#1: Protein | Mass: 54544.918 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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#2: Protein | Mass: 37446.070 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#3: Protein | Mass: 40498.754 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
-Mitochondrial import receptor subunit ... , 3 types, 3 molecules DEF
#4: Protein | Mass: 43947.262 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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#5: Protein | Mass: 6196.197 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
#6: Protein | Mass: 6481.539 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
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Buffer solution | pH: 7.4 | ||||||||||||||||||||||||
Specimen | Conc.: 6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.19.1_4122: / Classification: refinement | ||||||||||||||||||||||||
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EM software |
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CTF correction | Type: NONE | ||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.05 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 406531 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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