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- PDB-6ugm: Structural basis of COMPASS eCM recognition of an unmodified nucl... -
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Open data
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Basic information
Entry | Database: PDB / ID: 6ugm | |||||||||
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Title | Structural basis of COMPASS eCM recognition of an unmodified nucleosome | |||||||||
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![]() | TRANSFERASE/STRUCTURAL PROTEIN/DNA / Complex / methyltransferase / epigenetics / chromatin / nucleosome / TRANSFERASE-STRUCTURAL PROTEIN-DNA complex | |||||||||
Function / homology | ![]() [histone H3]-lysine4 N-trimethyltransferase / histone H3K4 trimethyltransferase activity / Set1C/COMPASS complex / methylated histone binding / structural constituent of chromatin / nucleosome / chromosome / methylation / histone binding / transcription cis-regulatory region binding ...[histone H3]-lysine4 N-trimethyltransferase / histone H3K4 trimethyltransferase activity / Set1C/COMPASS complex / methylated histone binding / structural constituent of chromatin / nucleosome / chromosome / methylation / histone binding / transcription cis-regulatory region binding / protein heterodimerization activity / positive regulation of DNA-templated transcription / DNA binding / RNA binding / nucleus / metal ion binding Similarity search - Function | |||||||||
Biological species | ![]() ![]() synthetic construct (others) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||
![]() | Hsu, P.L. / Shi, H. / Zheng, N. | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural Basis of H2B Ubiquitination-Dependent H3K4 Methylation by COMPASS. Authors: Peter L Hsu / Hui Shi / Calvin Leonen / Jianming Kang / Champak Chatterjee / Ning Zheng / ![]() Abstract: The COMPASS (complex of proteins associated with Set1) complex represents the prototype of the SET1/MLL family of methyltransferases that controls gene transcription by H3K4 methylation (H3K4me). ...The COMPASS (complex of proteins associated with Set1) complex represents the prototype of the SET1/MLL family of methyltransferases that controls gene transcription by H3K4 methylation (H3K4me). Although H2B monoubiquitination (H2Bub) is well known as a prerequisite histone mark for COMPASS activity, how H2Bub activates COMPASS remains unclear. Here, we report the cryoelectron microscopy (cryo-EM) structures of an extended COMPASS catalytic module (CM) bound to the H2Bub and free nucleosome. The COMPASS CM clamps onto the nucleosome disk-face via an extensive interface to capture the flexible H3 N-terminal tail. The interface also sandwiches a critical Set1 arginine-rich motif (ARM) that autoinhibits COMPASS. Unexpectedly, without enhancing COMPASS-nucleosome interaction, H2Bub activates the enzymatic assembly by packing against Swd1 and alleviating the inhibitory effect of the Set1 ARM upon fastening it to the acidic patch. By delineating the spatial configuration of the COMPASS-H2Bub-nucleosome assembly, our studies establish the structural framework for understanding the long-studied H2Bub-H3K4me histone modification crosstalk. | |||||||||
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 | ![]() | 646.8 KB | Display | ![]() |
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PDB format | ![]() | 481.4 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 915.3 KB | Display | ![]() |
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Full document | ![]() | 945.6 KB | Display | |
Data in XML | ![]() | 65.7 KB | Display | |
Data in CIF | ![]() | 104.4 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 20765MC ![]() 6uh5C 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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1 |
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Components
-Protein , 11 types, 15 molecules AEBFCGDHKMNXLOP
#1: Protein | Mass: 15275.879 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Protein | Mass: 11263.231 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #3: Protein | Mass: 11694.650 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Protein | | Mass: 13848.097 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #5: Protein | | Mass: 13834.070 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #8: Protein | | Mass: 36458.879 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: KLLA0_E24487g / Production host: ![]() #9: Protein | | Mass: 31448.504 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: SET1, KLLA0F24134g / Production host: ![]() References: UniProt: Q6CIT4, histone-lysine N-methyltransferase #10: Protein | | Mass: 49894.656 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: KLLA0_A08800g / Production host: ![]() #12: Protein | | Mass: 39297.867 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: KLLA0_D07260g / Production host: ![]() #13: Protein | | Mass: 47286.996 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: KLLA0_C10945g / Production host: ![]() #14: Protein | Mass: 14722.625 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: KLLA0_E03521g / Production host: ![]() |
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-DNA chain , 2 types, 2 molecules IJ
#6: DNA chain | Mass: 45114.746 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
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#7: DNA chain | Mass: 45305.852 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
-Protein/peptide , 1 types, 1 molecules R
#11: Protein/peptide | Mass: 378.444 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-Non-polymers , 2 types, 2 molecules 


#15: Chemical | ChemComp-SAM / |
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#16: Chemical | ChemComp-ZN / |
-Details
Has ligand of interest | N |
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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
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Molecular weight | Value: 0.45 MDa / Experimental value: NO | ||||||||||||||||||||||||
Source (natural) |
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Source (recombinant) |
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Buffer solution | pH: 7.5 | ||||||||||||||||||||||||
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
Specimen support | Details: unspecified | ||||||||||||||||||||||||
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: 74 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.15.2_3472: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 100905 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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