[English] 日本語
Yorodumi
- PDB-9qwn: Human UPF1 in complex with the histone stem loop RNA -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 9qwn
TitleHuman UPF1 in complex with the histone stem loop RNA
Components
  • Isoform 2 of Regulator of nonsense transcripts 1
  • RNA stem loop
KeywordsHYDROLASE / ATP-DEPENDENT HELICASE RENT1 / UP-FRAMESHIFT SUPPRESSOR 1 HOMOLOG / HUPF1 / UP FRAMESHIFT / histone stem loop mRNA
Function / homology
Function and homology information


positive regulation of mRNA cis splicing, via spliceosome / supraspliceosomal complex / double-stranded DNA helicase activity / exon-exon junction complex / cell cycle phase transition / telomere maintenance via semi-conservative replication / positive regulation of mRNA catabolic process / regulation of translational termination / histone mRNA catabolic process / 3'-UTR-mediated mRNA destabilization ...positive regulation of mRNA cis splicing, via spliceosome / supraspliceosomal complex / double-stranded DNA helicase activity / exon-exon junction complex / cell cycle phase transition / telomere maintenance via semi-conservative replication / positive regulation of mRNA catabolic process / regulation of translational termination / histone mRNA catabolic process / 3'-UTR-mediated mRNA destabilization / nuclear-transcribed mRNA catabolic process, nonsense-mediated decay / regulation of telomere maintenance / telomeric DNA binding / nuclear-transcribed mRNA catabolic process / cellular response to interleukin-1 / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / mRNA export from nucleus / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / P-body / helicase activity / cellular response to lipopolysaccharide / DNA helicase / DNA replication / chromosome, telomeric region / RNA helicase activity / RNA helicase / DNA repair / chromatin binding / chromatin / protein-containing complex binding / perinuclear region of cytoplasm / ATP hydrolysis activity / RNA binding / zinc ion binding / nucleoplasm / ATP binding / nucleus / cytosol / cytoplasm
Similarity search - Function
RNA helicase UPF1, 1B domain / RNA helicase (UPF2 interacting domain) / RNA helicase UPF1, 1B domain / Upf1 cysteine-histidine-rich (CH-rich) domain profile. / RNA helicase UPF1, Cys/His rich zinc-binding domain / DNA2/NAM7 helicase, helicase domain / AAA domain / DNA2/NAM7-like helicase / : / Helicase/UvrB, N-terminal ...RNA helicase UPF1, 1B domain / RNA helicase (UPF2 interacting domain) / RNA helicase UPF1, 1B domain / Upf1 cysteine-histidine-rich (CH-rich) domain profile. / RNA helicase UPF1, Cys/His rich zinc-binding domain / DNA2/NAM7 helicase, helicase domain / AAA domain / DNA2/NAM7-like helicase / : / Helicase/UvrB, N-terminal / Type III restriction enzyme, res subunit / DNA2/NAM7 helicase-like, C-terminal / AAA domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
RNA / RNA (> 10) / Regulator of nonsense transcripts 1
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.6 Å
AuthorsMachado de Amorim, A. / Loll, B. / Hilal, T. / Chakrabarti, S.
Funding support Germany, 6items
OrganizationGrant numberCountry
German Research Foundation (DFG)CH1245/5-1, CH1245/6-1 Germany
German Research Foundation (DFG)INST 335/589-1 Germany
German Research Foundation (DFG)INST 335/590-1 Germany
German Research Foundation (DFG)INST 335/590-1 Germany
German Research Foundation (DFG)(INST 130/1014-1 Germany
EIPOD fellowship under Marie Sklodowska-Curie Actions COFUND664726 Germany
CitationJournal: Nat Commun / Year: 2026
Title: Mechanistic insights into recruitment and regulation of the RNA helicase UPF1 in replication-dependent histone mRNA decay.
Authors: Alexandrina Machado de Amorim / Guangpu Xue / Wenxia He / Theresa Dittmers / Sarah Lewandowski / Cecilia Perez-Borrajero / Juliane Bethmann / Nevena Mateva / Clemens Krage / Vidhyadhar ...Authors: Alexandrina Machado de Amorim / Guangpu Xue / Wenxia He / Theresa Dittmers / Sarah Lewandowski / Cecilia Perez-Borrajero / Juliane Bethmann / Nevena Mateva / Clemens Krage / Vidhyadhar Nandana / Bernhard Loll / Tarek Hilal / Janosch Hennig / Henning Urlaub / William F Marzluff / Sutapa Chakrabarti /
Abstract: Metazoan histone mRNAs are a unique class of mRNAs that lack the poly(A) tail present in all other eukaryotic transcripts. Instead, they end in a conserved stem-loop (SL) structure, necessitating a ...Metazoan histone mRNAs are a unique class of mRNAs that lack the poly(A) tail present in all other eukaryotic transcripts. Instead, they end in a conserved stem-loop (SL) structure, necessitating a decay mechanism that is distinct from deadenylation-initiated degradation. Here, combining structural and functional approaches, we elucidate molecular mechanisms of initiation of histone mRNA decay. At the end of S-phase, the RNA helicase UPF1, the exoribonuclease 3'hExo and stem-loop binding protein SLBP all contribute to histone mRNA degradation, although how they are mechanistically coupled remained unknown. The cryoEM structure of an UPF1:SL RNA complex, presented here, shows that binding of UPF1 partially melts the RNA stem in the absence of ATP, harnessing the free energy derived from RNA-binding to unwind RNA. This melting event primes the SL-RNA for decay by 3'hExo. Using biochemical and cellular analyses, we demonstrate that SLBP directly engages the UPF1 helicase core to attenuate its unwinding activity and prevent premature degradation. Activation of UPF1 at a later stage promotes SL-RNA decay. We provide direct evidence that UPF1, SLBP and 3'hExo form a degradosome-like assembly that functionally couples SL unwinding and degradation, highlighting a dynamic and intricate network of UPF1-centric interactions that orchestrates timely histone mRNA decay.
History
DepositionApr 14, 2025Deposition site: PDBE / Processing site: PDBE
Revision 1.0Dec 3, 2025Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jan 14, 2026Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update
Revision 1.1Jan 14, 2026Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary / Data content type: EM metadata / EM metadata / EM metadata / Category: citation / citation_author / em_admin
Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata / EM metadata
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update
Revision 1.2Jan 21, 2026Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID / _em_admin.last_update
Revision 1.2Jan 21, 2026Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Database references / Experimental summary / Data content type: EM metadata / EM metadata / EM metadata / Category: citation / citation_author / em_admin
Data content type: EM metadata / EM metadata ...EM metadata / EM metadata / EM metadata / EM metadata / EM metadata
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID / _em_admin.last_update

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Isoform 2 of Regulator of nonsense transcripts 1
D: RNA stem loop
hetero molecules


Theoretical massNumber of molelcules
Total (without water)102,0655
Polymers101,8692
Non-polymers1963
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

-
Components

#1: Protein Isoform 2 of Regulator of nonsense transcripts 1 / ATP-dependent helicase RENT1 / Nonsense mRNA reducing factor 1 / NORF1 / Up-frameshift suppressor 1 ...ATP-dependent helicase RENT1 / Nonsense mRNA reducing factor 1 / NORF1 / Up-frameshift suppressor 1 homolog / hUpf1


Mass: 89972.188 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: UPF1, KIAA0221, RENT1 / Plasmid: pet28a / Production host: Escherichia coli DH5[alpha] (bacteria) / References: UniProt: Q92900, DNA helicase, RNA helicase
#2: RNA chain RNA stem loop


Mass: 11896.942 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Zn
Has ligand of interestN
Has protein modificationN

-
Experimental details

-
Experiment

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

-
Sample preparation

ComponentName: Upf1 / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.10 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli DH5[alpha] (bacteria) / Plasmid: vector
Buffer solutionpH: 7.5
SpecimenConc.: 5.6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 283 K

-
Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 96000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: ZEMLIN TABLEAU
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 40.57 sec. / Electron dose: 44 e/Å2 / Detector mode: COUNTING / Film or detector model: FEI FALCON III (4k x 4k) / Num. of grids imaged: 2 / Num. of real images: 5498

-
Processing

EM softwareName: PHENIX / Version: 1.21.2_5419 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 3102505
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 300222 / Algorithm: BACK PROJECTION / Num. of class averages: 1 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 198.86 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00247009
ELECTRON MICROSCOPYf_angle_d0.5249607
ELECTRON MICROSCOPYf_chiral_restr0.04071100
ELECTRON MICROSCOPYf_plane_restr0.00361154
ELECTRON MICROSCOPYf_dihedral_angle_d13.89491219

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more