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- PDB-7evn: The cryo-EM structure of the DDX42-SF3b complex -

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Basic information

Entry
Database: PDB / ID: 7evn
TitleThe cryo-EM structure of the DDX42-SF3b complex
Components
  • (Splicing factor 3B subunit ...) x 3
  • ATP-dependent RNA helicase DDX42
  • PHD finger-like domain-containing protein 5A
KeywordsSPLICING / DDX32 / SF3B1 / SF3b / U2 snRNP
Function / homology
Function and homology information


U11/U12 snRNP / B-WICH complex / U12-type spliceosomal complex / RNA splicing, via transesterification reactions / splicing factor binding / U2-type precatalytic spliceosome / U2-type spliceosomal complex / U2-type prespliceosome assembly / SAGA complex / U2 snRNP ...U11/U12 snRNP / B-WICH complex / U12-type spliceosomal complex / RNA splicing, via transesterification reactions / splicing factor binding / U2-type precatalytic spliceosome / U2-type spliceosomal complex / U2-type prespliceosome assembly / SAGA complex / U2 snRNP / U2-type prespliceosome / positive regulation of transcription by RNA polymerase III / precatalytic spliceosome / regulation of RNA splicing / spliceosomal complex assembly / mRNA Splicing - Minor Pathway / positive regulation of transcription by RNA polymerase I / U2 snRNA binding / Cajal body / regulation of DNA repair / catalytic step 2 spliceosome / mRNA Splicing - Major Pathway / RNA splicing / stem cell differentiation / spliceosomal complex / mRNA splicing, via spliceosome / negative regulation of protein catabolic process / B-WICH complex positively regulates rRNA expression / nuclear matrix / intracellular protein localization / regulation of apoptotic process / RNA helicase activity / nuclear speck / RNA helicase / chromatin remodeling / mRNA binding / positive regulation of DNA-templated transcription / protein-containing complex binding / nucleolus / positive regulation of transcription by RNA polymerase II / ATP hydrolysis activity / DNA binding / RNA binding / zinc ion binding / nucleoplasm / ATP binding / nucleus / membrane / cytoplasm / cytosol
Similarity search - Function
Splicing factor 3B, subunit 5 / Splicing factor 3B subunit 1 / Splicing factor 3B subunit 1 / PHF5-like / PHF5-like protein / Splicing factor 3B subunit 5/RDS3 complex subunit 10 / Splicing factor 3B subunit 10 (SF3b10) / Splicing factor 3B subunit 1-like / : / PPP2R1A-like HEAT repeat ...Splicing factor 3B, subunit 5 / Splicing factor 3B subunit 1 / Splicing factor 3B subunit 1 / PHF5-like / PHF5-like protein / Splicing factor 3B subunit 5/RDS3 complex subunit 10 / Splicing factor 3B subunit 10 (SF3b10) / Splicing factor 3B subunit 1-like / : / PPP2R1A-like HEAT repeat / DEAD-box subfamily ATP-dependent helicases signature. / ATP-dependent RNA helicase DEAD-box, conserved site / RNA helicase, DEAD-box type, Q motif / RSE1/DDB1/CPSF1 second beta-propeller / Cleavage/polyadenylation specificity factor, A subunit, C-terminal / Cleavage/polyadenylation specificity factor, A subunit, N-terminal / : / CPSF A subunit region / RSE1/DDB1/CPSF1 first beta-propeller / DEAD-box RNA helicase Q motif profile. / DEAD/DEAH box helicase domain / DEAD/DEAH box helicase / YVTN repeat-like/Quinoprotein amine dehydrogenase / 7 Propeller / Methylamine Dehydrogenase; Chain H / Helicase conserved C-terminal domain / Armadillo-like helical / helicase superfamily c-terminal domain / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / Armadillo-type fold / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta
Similarity search - Domain/homology
Splicing factor 3B subunit 1 / Splicing factor 3B subunit 3 / PHD finger-like domain-containing protein 5A / ATP-dependent RNA helicase DDX42 / Splicing factor 3B subunit 5
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.6 Å
AuthorsZhang, X. / Zhan, X. / Shi, Y.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31930059 China
CitationJournal: Nat.Struct.Mol.Biol. / Year: 2024
Title: Structural insights into branch site proofreading by human spliceosome
Authors: Zhang, X. / Zhan, X. / Bian, T. / Yang, F. / Li, P. / Lu, Y. / Xing, Z. / Fan, R. / Zhang, Q.C. / Shi, Y.
History
DepositionMay 21, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 3, 2022Provider: repository / Type: Initial release
Revision 1.0Aug 3, 2022Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Aug 3, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Aug 3, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Aug 3, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Aug 3, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Aug 3, 2022Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Aug 3, 2022Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Aug 16, 2023Group: Data collection / Database references
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Jan 17, 2024Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.3Jun 18, 2025Group: Data collection / Structure summary / Category: em_admin / em_software / pdbx_entry_details
Item: _em_admin.last_update / _em_software.name / _pdbx_entry_details.has_protein_modification
Revision 1.1Jun 18, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
B: Splicing factor 3B subunit 5
C: Splicing factor 3B subunit 1
D: PHD finger-like domain-containing protein 5A
A: Splicing factor 3B subunit 3
E: ATP-dependent RNA helicase DDX42
hetero molecules


Theoretical massNumber of molelcules
Total (without water)365,7328
Polymers365,5365
Non-polymers1963
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area20660 Å2
ΔGint-82 kcal/mol
Surface area112680 Å2

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Components

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Splicing factor 3B subunit ... , 3 types, 3 molecules BCA

#1: Protein Splicing factor 3B subunit 5 / SF3b5 / Pre-mRNA-splicing factor SF3b 10 kDa subunit


Mass: 10149.369 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SF3B5, SF3B10 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: Q9BWJ5
#2: Protein Splicing factor 3B subunit 1 / Pre-mRNA-splicing factor SF3b 155 kDa subunit / SF3b155 / Spliceosome-associated protein 155 / SAP 155


Mass: 98747.867 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SF3B1, SAP155 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: O75533
#4: Protein Splicing factor 3B subunit 3 / Pre-mRNA-splicing factor SF3b 130 kDa subunit / SF3b130 / STAF130 / Spliceosome-associated protein ...Pre-mRNA-splicing factor SF3b 130 kDa subunit / SF3b130 / STAF130 / Spliceosome-associated protein 130 / SAP 130


Mass: 138949.188 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SF3B3, KIAA0017, SAP130 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: Q15393

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Protein , 2 types, 2 molecules DE

#3: Protein PHD finger-like domain-containing protein 5A / PHD finger-like domain protein 5A / Splicing factor 3B-associated 14 kDa protein / SF3b14b


Mass: 12427.524 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PHF5A / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: Q7RTV0
#5: Protein ATP-dependent RNA helicase DDX42 / DEAD box protein 42 / RNA helicase-like protein / RHELP / RNA helicase-related protein / RNAHP / ...DEAD box protein 42 / RNA helicase-like protein / RHELP / RNA helicase-related protein / RNAHP / SF3b DEAD box protein / Splicing factor 3B-associated 125 kDa protein / SF3b125


Mass: 105261.625 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: DDX42 / Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: Q86XP3, RNA helicase

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Non-polymers , 1 types, 3 molecules

#6: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: The DDX42-SF3b core complex / Type: COMPLEX / Entity ID: #1-#5 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.9
SpecimenConc.: 1.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 %

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.17.1_3660: / Classification: refinement
EM softwareName: PHENIX / Category: model refinement
CTF correctionType: NONE
3D reconstructionResolution: 2.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 234800 / Algorithm: FOURIER SPACE / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00617398
ELECTRON MICROSCOPYf_angle_d0.70123572
ELECTRON MICROSCOPYf_dihedral_angle_d19.7282354
ELECTRON MICROSCOPYf_chiral_restr0.0482678
ELECTRON MICROSCOPYf_plane_restr0.0053044

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