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Open data
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Basic information
| Entry | Database: PDB / ID: 8yjb | |||||||||||||||||||||||||||||||||||||||
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| Title | Cryo-EM structure of the human DSS1-INTAC complex | |||||||||||||||||||||||||||||||||||||||
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Keywords | TRANSCRIPTION / DSS1 / Integrator / INTAC | |||||||||||||||||||||||||||||||||||||||
| Function / homology | Function and homology informationU2 snRNA 3'-end processing / meiotic spindle elongation / snRNA 3'-end processing / PP2A-mediated dephosphorylation of key metabolic factors / RNA polymerase II CTD heptapeptide repeat S2 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S7 phosphatase activity / peptidyl-threonine dephosphorylation / regulation of meiotic cell cycle process involved in oocyte maturation / mitotic sister chromatid separation / MASTL Facilitates Mitotic Progression ...U2 snRNA 3'-end processing / meiotic spindle elongation / snRNA 3'-end processing / PP2A-mediated dephosphorylation of key metabolic factors / RNA polymerase II CTD heptapeptide repeat S2 phosphatase activity / RNA polymerase II CTD heptapeptide repeat S7 phosphatase activity / peptidyl-threonine dephosphorylation / regulation of meiotic cell cycle process involved in oocyte maturation / mitotic sister chromatid separation / MASTL Facilitates Mitotic Progression / meiotic sister chromatid cohesion, centromeric / snRNA processing / protein phosphatase type 2A complex / INTAC complex / RNA polymerase II CTD heptapeptide repeat S5 phosphatase activity / FAR/SIN/STRIPAK complex / female meiotic nuclear division / Regulation of glycolysis by fructose 2,6-bisphosphate metabolism / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / Impaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / regulation of transcription elongation by RNA polymerase II / protein phosphatase regulator activity / integrator complex / protein antigen binding / GABA receptor binding / APC truncation mutants have impaired AXIN binding / AXIN missense mutants destabilize the destruction complex / Truncations of AMER1 destabilize the destruction complex / Hydrolases; Acting on ester bonds; Endoribonucleases producing 3'-phosphomonoesters / positive regulation of extrinsic apoptotic signaling pathway in absence of ligand / ERKs are inactivated / Initiation of Nuclear Envelope (NE) Reformation / Beta-catenin phosphorylation cascade / Signaling by GSK3beta mutants / CTNNB1 S33 mutants aren't phosphorylated / CTNNB1 S37 mutants aren't phosphorylated / CTNNB1 S45 mutants aren't phosphorylated / CTNNB1 T41 mutants aren't phosphorylated / proteasome regulatory particle, lid subcomplex / Co-stimulation by CD28 / RNA polymerase II transcription initiation surveillance / regulation of growth / Disassembly of the destruction complex and recruitment of AXIN to the membrane / Regulation of ornithine decarboxylase (ODC) / protein dephosphorylation / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / inner cell mass cell proliferation / Somitogenesis / Homologous DNA Pairing and Strand Exchange / Defective homologous recombination repair (HRR) due to BRCA1 loss of function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA2/RAD51/RAD51C binding function / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / negative regulation of epithelial to mesenchymal transition / Co-inhibition by CTLA4 / Resolution of D-loop Structures through Holliday Junction Intermediates / Platelet sensitization by LDL / protein-serine/threonine phosphatase / Impaired BRCA2 binding to RAD51 / ERK/MAPK targets / negative regulation of glycolytic process through fructose-6-phosphate / mesoderm development / protein serine/threonine phosphatase activity / vascular endothelial cell response to oscillatory fluid shear stress / positive regulation of NLRP3 inflammasome complex assembly / T cell homeostasis / regulation of cell differentiation / regulation of microtubule polymerization / regulation of G1/S transition of mitotic cell cycle / RNA polymerase II transcribes snRNA genes / Presynaptic phase of homologous DNA pairing and strand exchange / chromosome, centromeric region / lateral plasma membrane / DARPP-32 events / negative regulation of hippo signaling / proteasome assembly / mRNA export from nucleus / Cyclin A/B1/B2 associated events during G2/M transition / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / spindle assembly / protein localization to chromatin / RNA endonuclease activity / phosphoprotein phosphatase activity / Amplification of signal from unattached kinetochores via a MAD2 inhibitory signal / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Recruitment of mitotic centrosome proteins and complexes / embryo implantation / Recruitment of NuMA to mitotic centrosomes / protein tyrosine phosphatase activity / Anchoring of the basal body to the plasma membrane / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / proteasome complex / DNA damage checkpoint signaling / Turbulent (oscillatory, disturbed) flow shear stress activates signaling by PIEZO1 and integrins in endothelial cells / AURKA Activation by TPX2 / Resolution of Sister Chromatid Cohesion Similarity search - Function | |||||||||||||||||||||||||||||||||||||||
| Biological species | Homo sapiens (human) | |||||||||||||||||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.1 Å | |||||||||||||||||||||||||||||||||||||||
Authors | Zheng, H. / Xu, Y. / Cheng, J. | |||||||||||||||||||||||||||||||||||||||
| Funding support | 1items
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Citation | Journal: Nat Commun / Year: 2025Title: DSS1 is required for proper Integrator-PP2A function. Authors: Congling Xu / Qian-Xing Zhou / Hai Zheng / Aixia Song / Wen-Ying Zhao / Ting-Ting Xu / Yan Xiong / Yi-Jie Zhang / Zixuan Huang / Yanhui Xu / Jingdong Cheng / Fei Xavier Chen / ![]() Abstract: Integrator-PP2A (INTAC) is a highly modular complex orchestrating the transition of paused RNA polymerase II into productive elongation or promoter-proximal premature termination, with its loss ...Integrator-PP2A (INTAC) is a highly modular complex orchestrating the transition of paused RNA polymerase II into productive elongation or promoter-proximal premature termination, with its loss resulting in transcription dysregulation and genome instability. Here, we identify human DSS1-a flexible 70-residue protein found in multiple functionally diverse complexes including the 26S proteasome-as an integral subunit of the INTAC backbone. Structural analysis of DSS1-INTAC, both alone and in association with paused polymerase, demonstrates intimate interactions between DSS1 and the INTAC backbone. We identify tryptophan 39 of DSS1 as being critical for interacting with INTAC and find that its mutation disrupts DSS1's interaction with INTAC, while maintaining DSS1's interaction with the proteasome. This substitution not only impairs INTAC-dependent transcriptional regulation, but also reveals that INTAC is DSS1's major chromatin-bound form. Together, our findings reveal a role for DSS1 in supporting the structure and regulatory functions of INTAC. | |||||||||||||||||||||||||||||||||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 8yjb.cif.gz | 1.4 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb8yjb.ent.gz | 1.1 MB | Display | PDB format |
| PDBx/mmJSON format | 8yjb.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/yj/8yjb ftp://data.pdbj.org/pub/pdb/validation_reports/yj/8yjb | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 39338MC ![]() 9vd9C M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
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Assembly
| Deposited unit | ![]()
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Components
-Protein , 1 types, 1 molecules 0
| #1: Protein | Mass: 8284.611 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: SHFM1, DSS1, SHFDG1 / Production host: Homo sapiens (human) / References: UniProt: P60896 |
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-Integrator complex subunit ... , 9 types, 9 molecules IKBDGAEFH
| #2: Protein | Mass: 73891.219 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS9, RC74 / Production host: Homo sapiens (human) / References: UniProt: Q9NV88 |
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| #3: Protein | Mass: 67756.562 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS11, CPSF3L, RC68 / Production host: Homo sapiens (human)References: UniProt: Q5TA45, Hydrolases; Acting on ester bonds; Endoribonucleases producing 3'-phosphomonoesters |
| #4: Protein | Mass: 134451.625 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS2, KIAA1287 / Production host: Homo sapiens (human) / References: UniProt: Q9H0H0 |
| #5: Protein | Mass: 108306.758 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS4, MSTP093 / Production host: Homo sapiens (human) / References: UniProt: Q96HW7 |
| #6: Protein | Mass: 106952.617 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS7, C1orf73 / Production host: Homo sapiens (human) / References: UniProt: Q9NVH2 |
| #9: Protein | Mass: 244574.922 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS1, KIAA1440, UNQ1821/PRO3434 / Production host: Homo sapiens (human) / References: UniProt: Q8N201 |
| #10: Protein | Mass: 108115.227 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS5, KIAA1698 / Production host: Homo sapiens (human) / References: UniProt: Q6P9B9 |
| #11: Protein | Mass: 100527.078 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS6, DBI1, DDX26, DDX26A / Production host: Homo sapiens (human) / References: UniProt: Q9UL03 |
| #12: Protein | Mass: 113219.859 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: INTS8, C8orf52 / Production host: Homo sapiens (human) / References: UniProt: Q75QN2 |
-Serine/threonine-protein phosphatase 2A ... , 2 types, 2 molecules PQ
| #7: Protein | Mass: 65378.344 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PPP2R1A / Production host: Homo sapiens (human) / References: UniProt: P30153 |
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| #8: Protein | Mass: 35636.152 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PPP2CA / Production host: Homo sapiens (human)References: UniProt: P67775, protein-serine/threonine phosphatase |
-Non-polymers , 2 types, 4 molecules 


| #13: Chemical | | #14: Chemical | |
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-Details
| Has ligand of interest | N |
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| Has protein modification | Y |
-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: DSS1-INTAC-PEC / Type: COMPLEX / Entity ID: #1-#12 / Source: RECOMBINANT |
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| Source (natural) | Organism: Homo sapiens (human) |
| Source (recombinant) | Organism: Homo sapiens (human) |
| Buffer solution | pH: 7.4 |
| Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
| Specimen support | Grid material: GOLD / 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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm |
| Specimen holder | Cryogen: NITROGEN |
| Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 587397 | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 43790 / Symmetry type: POINT | ||||||||||||||||||||||||
| Atomic model building | Protocol: RIGID BODY FIT | ||||||||||||||||||||||||
| Atomic model building | PDB-ID: 7YCX Accession code: 7YCX / Source name: PDB / Type: experimental model |
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Homo sapiens (human)
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FIELD EMISSION GUN
