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- PDB-6iy3: Structure of Snf2-MMTV-A nucleosome complex at shl-2 in ADP state -
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Basic information
Entry | Database: PDB / ID: 6iy3 | ||||||
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Title | Structure of Snf2-MMTV-A nucleosome complex at shl-2 in ADP state | ||||||
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![]() | STRUCTURAL PROTEIN/HYDROLASE/DNA / complex / nucleosome / chromatin remodeling / gene regulation / STRUCTURAL PROTEIN-HYDROLASE-DNA complex / NUCLEAR PROTEIN | ||||||
Function / homology | ![]() positive regulation of cell adhesion involved in single-species biofilm formation / positive regulation of mating type switching / positive regulation of invasive growth in response to glucose limitation / aggrephagy / rDNA binding / DNA strand invasion / ATP-dependent chromatin remodeler activity / SWI/SNF complex / ATP-dependent activity, acting on DNA / nucleosomal DNA binding ...positive regulation of cell adhesion involved in single-species biofilm formation / positive regulation of mating type switching / positive regulation of invasive growth in response to glucose limitation / aggrephagy / rDNA binding / DNA strand invasion / ATP-dependent chromatin remodeler activity / SWI/SNF complex / ATP-dependent activity, acting on DNA / nucleosomal DNA binding / helicase activity / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / lysine-acetylated histone binding / DNA-templated DNA replication / structural constituent of chromatin / nucleosome / double-strand break repair / nucleosome assembly / RNA polymerase II-specific DNA-binding transcription factor binding / hydrolase activity / chromatin remodeling / protein heterodimerization activity / chromatin / regulation of transcription by RNA polymerase II / positive regulation of transcription by RNA polymerase II / DNA binding / nucleoplasm / ATP binding / nucleus Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.67 Å | ||||||
![]() | Li, M. / Xia, X. / Liu, X. / Li, X. / Chen, Z. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Mechanism of DNA translocation underlying chromatin remodelling by Snf2. Authors: Meijing Li / Xian Xia / Yuanyuan Tian / Qi Jia / Xiaoyu Liu / Ying Lu / Ming Li / Xueming Li / Zhucheng Chen / ![]() Abstract: Chromatin remodellers include diverse enzymes with distinct biological functions, but nucleosome-sliding activity appears to be a common theme. Among the remodelling enzymes, Snf2 serves as the ...Chromatin remodellers include diverse enzymes with distinct biological functions, but nucleosome-sliding activity appears to be a common theme. Among the remodelling enzymes, Snf2 serves as the prototype to study the action of this protein family. Snf2 and related enzymes share two conserved RecA-like lobes, which by themselves are able to couple ATP hydrolysis to chromatin remodelling. The mechanism by which these enzymes couple ATP hydrolysis to translocate the nucleosome along the DNA remains unclear. Here we report the structures of Saccharomyces cerevisiae Snf2 bound to the nucleosome in the presence of ADP and ADP-BeF. Snf2 in the ADP-bound state adopts an open conformation similar to that in the apo state, and induces a one-base-pair DNA bulge at superhelix location 2 (SHL2), with the tracking strand showing greater distortion than the guide strand. The DNA distortion propagates to the proximal end, leading to staggered translocation of the two strands. The binding of ADP-BeF triggers a closed conformation of the enzyme, resetting the nucleosome to a relaxed state. Snf2 shows altered interactions with the DNA in different nucleotide states, providing the structural basis for DNA translocation. Together, our findings suggest a fundamental mechanism for the DNA translocation that underlies chromatin remodelling. | ||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 397.6 KB | Display | ![]() |
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PDB format | ![]() | 303.2 KB | Display | ![]() |
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-Validation report
Summary document | ![]() | 1006.2 KB | Display | ![]() |
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Full document | ![]() | 1022 KB | Display | |
Data in XML | ![]() | 45.9 KB | Display | |
Data in CIF | ![]() | 72.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9749MC ![]() 6879C ![]() 6880C ![]() 6882C ![]() 6883C ![]() 9748C ![]() 5z3lC ![]() 5z3oC ![]() 5z3uC ![]() 5z3vC ![]() 6iy2C 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
-Protein , 5 types, 9 molecules AEBFCGDHO
#1: Protein | Mass: 11728.729 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Protein | Mass: 10061.849 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #3: Protein | Mass: 12441.526 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Protein | Mass: 11050.778 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #7: Protein | | Mass: 79113.461 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: SNF2, GAM1, RIC1, SWI2, TYE3, YOR290C / Production host: ![]() ![]() References: UniProt: P22082, Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement |
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-DNA chain , 2 types, 2 molecules JI
#5: DNA chain | Mass: 44849.496 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() |
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#6: DNA chain | Mass: 45901.312 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() |
-Non-polymers , 1 types, 1 molecules ![](data/chem/img/ADP.gif)
#8: Chemical | ChemComp-ADP / |
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-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
Component | Name: Structure of Snf2-MMTV-A nucleosome complex at shl-2 in ADP state Type: COMPLEX / Entity ID: #1-#7 / Source: RECOMBINANT |
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Molecular weight | Value: 0.3 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3 |
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 / Nominal magnification: 2250 X / Calibrated magnification: 2250 X / Nominal defocus max: 3500 nm / Nominal defocus min: 1800 nm / Calibrated defocus min: 1800 nm / Calibrated defocus max: 3500 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: BASIC |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 50 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.13_2998: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.67 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 154645 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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