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- PDB-7dd3: Cryo-EM structure of the pre-mRNA-loaded DEAH-box ATPase/helicase... -

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Basic information

Entry
Database: PDB / ID: 7dd3
TitleCryo-EM structure of the pre-mRNA-loaded DEAH-box ATPase/helicase Prp2 in complex with Spp2
Components
  • PRP2 isoform 1
  • Pre-mRNA-splicing factor SPP2
  • pre-mRNAPrimary transcript
KeywordsSPLICING / RNA splicing / spliceosome / Bact complex / Prp2 / Spp2 / DEAH-box ATPase/helicase
Function / homology
Function and homology information


snoRNA splicing / generation of catalytic spliceosome for first transesterification step / U2-type catalytic step 1 spliceosome / ATP-dependent activity, acting on RNA / ATPase activator activity / helicase activity / spliceosomal complex / mRNA splicing, via spliceosome / RNA helicase activity / nucleic acid binding ...snoRNA splicing / generation of catalytic spliceosome for first transesterification step / U2-type catalytic step 1 spliceosome / ATP-dependent activity, acting on RNA / ATPase activator activity / helicase activity / spliceosomal complex / mRNA splicing, via spliceosome / RNA helicase activity / nucleic acid binding / RNA helicase / ATP hydrolysis activity / RNA binding / ATP binding / nucleus / cytoplasm
Similarity search - Function
Pre-mRNA-splicing factor Spp2-like / Spp2/MOS2, G-patch domain / G-patch domain / G-patch domain / glycine rich nucleic binding domain / : / Helicase associated domain (HA2), ratchet-like / DEAD-box helicase, OB fold / Oligonucleotide/oligosaccharide-binding (OB)-fold / Helicase-associated domain ...Pre-mRNA-splicing factor Spp2-like / Spp2/MOS2, G-patch domain / G-patch domain / G-patch domain / glycine rich nucleic binding domain / : / Helicase associated domain (HA2), ratchet-like / DEAD-box helicase, OB fold / Oligonucleotide/oligosaccharide-binding (OB)-fold / Helicase-associated domain / Helicase associated domain (HA2), winged-helix / Helicase associated domain (HA2) Add an annotation / DNA/RNA helicase, ATP-dependent, DEAH-box type, conserved site / DEAH-box subfamily ATP-dependent helicases signature. / DEAD/DEAH box helicase / DEAD/DEAH box helicase domain / Helicase conserved C-terminal domain / 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 / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
RNA / PRP2 isoform 1 / Pre-mRNA-splicing factor SPP2 / Pre-mRNA-splicing factor ATP-dependent RNA helicase-like protein PRP2 / Pre-mRNA-splicing factor SPP2
Similarity search - Component
Biological speciesSaccharomyces cerevisiae (brewer's yeast)
MethodELECTRON MICROSCOPY / single particle reconstruction / negative staining / cryo EM / Resolution: 3.2 Å
AuthorsBai, R. / Wan, R. / Yan, C. / Qi, J. / Zhang, P. / Lei, J. / Shi, Y.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)31930059 China
CitationJournal: Science / Year: 2021
Title: Mechanism of spliceosome remodeling by the ATPase/helicase Prp2 and its coactivator Spp2.
Authors: Rui Bai / Ruixue Wan / Chuangye Yan / Qi Jia / Jianlin Lei / Yigong Shi /
Abstract: Spliceosome remodeling, executed by conserved adenosine triphosphatase (ATPase)/helicases including Prp2, enables precursor messenger RNA (pre-mRNA) splicing. However, the structural basis for the ...Spliceosome remodeling, executed by conserved adenosine triphosphatase (ATPase)/helicases including Prp2, enables precursor messenger RNA (pre-mRNA) splicing. However, the structural basis for the function of the ATPase/helicases remains poorly understood. Here, we report atomic structures of Prp2 in isolation, Prp2 complexed with its coactivator Spp2, and Prp2-loaded activated spliceosome and the results of structure-guided biochemical analysis. Prp2 weakly associates with the spliceosome and cannot function without Spp2, which stably associates with Prp2 and anchors on the spliceosome, thus tethering Prp2 to the activated spliceosome and allowing Prp2 to function. Pre-mRNA is loaded into a featured channel between the N and C halves of Prp2, where Leu from the N half and Arg from the C half prevent backward sliding of pre-mRNA toward its 5'-end. Adenosine 5'-triphosphate binding and hydrolysis trigger interdomain movement in Prp2, which drives unidirectional stepwise translocation of pre-mRNA toward its 3'-end. These conserved mechanisms explain the coupling of spliceosome remodeling to pre-mRNA splicing.
History
DepositionOct 27, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jan 6, 2021Provider: repository / Type: Initial release
Revision 1.1Jan 27, 2021Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.year / _citation_author.identifier_ORCID
Revision 1.2Mar 27, 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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Structure visualization

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Assembly

Deposited unit
x: PRP2 isoform 1
y: Pre-mRNA-splicing factor SPP2
G: pre-mRNA


Theoretical massNumber of molelcules
Total (without water)123,3433
Polymers123,3433
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area5860 Å2
ΔGint-61 kcal/mol
Surface area36320 Å2

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Components

#1: Protein PRP2 isoform 1 / Y55_G0047080.mRNA.1.CDS.1


Mass: 99947.492 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: A0A6A5Q5S8, UniProt: P20095*PLUS
#2: Protein Pre-mRNA-splicing factor SPP2


Mass: 20685.377 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: A0A6A5Q6Y7, UniProt: Q02521*PLUS
#3: RNA chain pre-mRNA / Primary transcript


Mass: 2710.535 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae (brewer's yeast)

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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 complex of pre-mRNA-loaded DEAH-box ATPase/helicase Prp2 and its coactivator Spp2
Type: COMPLEX / Entity ID: all / Source: NATURAL
Molecular weightUnits: KILODALTONS/NANOMETER / Experimental value: YES
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Buffer solutionpH: 7.9
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: YES / Vitrification applied: YES
EM stainingType: NEGATIVE / Material: Uranyl Acetate
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationCryogen name: ETHANE / Humidity: 100 %

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Electron microscopy imaging

MicroscopyModel: FEI TITAN
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 45 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 556393 / Symmetry type: POINT

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