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- PDB-6bm0: Cryo-EM structure of human CPSF-160-WDR33 complex at 3.8 A resolution -

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Basic information

Entry
Database: PDB / ID: 6bm0
TitleCryo-EM structure of human CPSF-160-WDR33 complex at 3.8 A resolution
Components
  • Cleavage and polyadenylation specificity factor subunit 1
  • pre-mRNA 3' end processing protein WDR33
KeywordsPROTEIN BINDING / Polyadenylation / scaffolding protein / WD40
Function / homology
Function and homology information


co-transcriptional RNA 3'-end processing, cleavage and polyadenylation pathway / Processing of Intronless Pre-mRNAs / mRNA cleavage and polyadenylation specificity factor complex / collagen trimer / mRNA 3'-UTR AU-rich region binding / mRNA 3'-end processing / Transport of Mature mRNA Derived from an Intronless Transcript / mRNA 3'-end processing / tRNA processing in the nucleus / postreplication repair ...co-transcriptional RNA 3'-end processing, cleavage and polyadenylation pathway / Processing of Intronless Pre-mRNAs / mRNA cleavage and polyadenylation specificity factor complex / collagen trimer / mRNA 3'-UTR AU-rich region binding / mRNA 3'-end processing / Transport of Mature mRNA Derived from an Intronless Transcript / mRNA 3'-end processing / tRNA processing in the nucleus / postreplication repair / RNA Polymerase II Transcription Termination / Processing of Capped Intron-Containing Pre-mRNA / fibrillar center / mRNA processing / spermatogenesis / enzyme binding / RNA binding / nucleoplasm / nucleus
Similarity search - Function
Pre-mRNA 3' end processing protein Pfs2-like / Collagen triple helix repeat / Collagen triple helix repeat (20 copies) / Cleavage/polyadenylation specificity factor, A subunit, N-terminal / Mono-functional DNA-alkylating methyl methanesulfonate N-term / Cleavage/polyadenylation specificity factor, A subunit, C-terminal / : / CPSF A subunit region / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. ...Pre-mRNA 3' end processing protein Pfs2-like / Collagen triple helix repeat / Collagen triple helix repeat (20 copies) / Cleavage/polyadenylation specificity factor, A subunit, N-terminal / Mono-functional DNA-alkylating methyl methanesulfonate N-term / Cleavage/polyadenylation specificity factor, A subunit, C-terminal / : / CPSF A subunit region / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD domain, G-beta repeat / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily
Similarity search - Domain/homology
Cleavage and polyadenylation specificity factor subunit 1 / pre-mRNA 3' end processing protein WDR33
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsSun, Y. / Zhang, Y. / Hamilton, K. / Walz, T. / Tong, L.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM118093 United States
CitationJournal: Proc Natl Acad Sci U S A / Year: 2018
Title: Molecular basis for the recognition of the human AAUAAA polyadenylation signal.
Authors: Yadong Sun / Yixiao Zhang / Keith Hamilton / James L Manley / Yongsheng Shi / Thomas Walz / Liang Tong /
Abstract: Nearly all eukaryotic messenger RNA precursors must undergo cleavage and polyadenylation at their 3'-end for maturation. A crucial step in this process is the recognition of the AAUAAA ...Nearly all eukaryotic messenger RNA precursors must undergo cleavage and polyadenylation at their 3'-end for maturation. A crucial step in this process is the recognition of the AAUAAA polyadenylation signal (PAS), and the molecular mechanism of this recognition has been a long-standing problem. Here, we report the cryo-electron microscopy structure of a quaternary complex of human CPSF-160, WDR33, CPSF-30, and an AAUAAA RNA at 3.4-Å resolution. Strikingly, the AAUAAA PAS assumes an unusual conformation that allows this short motif to be bound directly by both CPSF-30 and WDR33. The A1 and A2 bases are recognized specifically by zinc finger 2 (ZF2) of CPSF-30 and the A4 and A5 bases by ZF3. Interestingly, the U3 and A6 bases form an intramolecular Hoogsteen base pair and directly contact WDR33. CPSF-160 functions as an essential scaffold and preorganizes CPSF-30 and WDR33 for high-affinity binding to AAUAAA. Our findings provide an elegant molecular explanation for how PAS sequences are recognized for mRNA 3'-end formation.
History
DepositionNov 12, 2017Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 22, 2017Provider: repository / Type: Initial release
Revision 1.1Dec 6, 2017Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.2Dec 20, 2017Group: Database references / Category: citation
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.3Feb 28, 2018Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.year
Revision 1.4Jan 1, 2020Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.5Mar 13, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Assembly

Deposited unit
A: Cleavage and polyadenylation specificity factor subunit 1
B: pre-mRNA 3' end processing protein WDR33


Theoretical massNumber of molelcules
Total (without water)228,6212
Polymers228,6212
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area7290 Å2
ΔGint-28 kcal/mol
Surface area59000 Å2

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Components

#1: Protein Cleavage and polyadenylation specificity factor subunit 1 / Cleavage and polyadenylation specificity factor 160 kDa subunit / CPSF 160 kDa subunit


Mass: 161074.234 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CPSF1, CPSF160 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: Q10570
#2: Protein pre-mRNA 3' end processing protein WDR33 / WD repeat-containing protein 33 / WD repeat-containing protein WDC146


Mass: 67546.812 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: WDR33, WDC146 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: Q9C0J8

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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: Binary complex of human CPSF-160-WDR33 / Type: COMPLEX
Details: WDR33 is bound between the top faces of b- propeller A and C in CPSF-160
Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 0.225 MDa / Experimental value: YES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Trichoplusia ni (cabbage looper)
Buffer solutionpH: 7.9 / Details: 25 mM Tris-HCl, pH 7.9, 300 mM NaCl, 5 mM DTT
Buffer componentConc.: 0.3 mM / Name: sodium chloride / Formula: NaCl
SpecimenConc.: 1.8 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Details: CHAPSO (8 mM final concentration) was added to prevent the particles from adopting preferred orientations in the ice layer
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 % / Chamber temperature: 277 K

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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 / Nominal magnification: 225000 X / Calibrated magnification: 38462 X / Nominal defocus max: 2700 nm / Nominal defocus min: 1300 nm / Calibrated defocus min: 800 nm / Calibrated defocus max: 3000 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 10 sec. / Electron dose: 47 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1625
Image scansMovie frames/image: 40 / Used frames/image: 1-40

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Processing

EM software
IDNameCategory
1Gautomatchparticle selection
4CTFFINDCTF correction
9PHENIXmodel refinement
13RELION3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 372707
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 205373 / Symmetry type: POINT

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