[English] 日本語
Yorodumi
- EMDB-17795: Cryo-EM structure of human DNA polymerase alpha-primase in pre-in... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: EMDB / ID: EMD-17795
TitleCryo-EM structure of human DNA polymerase alpha-primase in pre-initiation stage 1
Map data
Sample
  • Complex: DNA polymerase alpha-primase with bound nucleotide
KeywordsDNA polymerase / complex / DNA BINDING PROTEIN
Function / homology
Function and homology information


DNA primase AEP / positive regulation of DNA primase activity / ribonucleotide binding / DNA replication initiation / DNA/RNA hybrid binding / Telomere C-strand synthesis initiation / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / Polymerase switching / Processive synthesis on the lagging strand / alpha DNA polymerase:primase complex ...DNA primase AEP / positive regulation of DNA primase activity / ribonucleotide binding / DNA replication initiation / DNA/RNA hybrid binding / Telomere C-strand synthesis initiation / Inhibition of replication initiation of damaged DNA by RB1/E2F1 / Polymerase switching / Processive synthesis on the lagging strand / alpha DNA polymerase:primase complex / regulation of type I interferon production / Removal of the Flap Intermediate / DNA primase activity / Polymerase switching on the C-strand of the telomere / lagging strand elongation / DNA replication, synthesis of primer / mitotic DNA replication initiation / DNA strand elongation involved in DNA replication / leading strand elongation / DNA synthesis involved in DNA repair / G1/S-Specific Transcription / DNA replication origin binding / DNA replication initiation / Activation of the pre-replicative complex / Defective pyroptosis / nuclear matrix / double-strand break repair via nonhomologous end joining / protein import into nucleus / single-stranded DNA binding / nuclear envelope / 4 iron, 4 sulfur cluster binding / DNA replication / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / nucleotide binding / DNA repair / chromatin binding / chromatin / nucleolus / protein kinase binding / magnesium ion binding / DNA binding / zinc ion binding / nucleoplasm / membrane / metal ion binding / nucleus / cytosol
Similarity search - Function
DNA polymerase alpha, subunit B, N-terminal domain superfamily / DNA polymerase alpha subunit B N-terminal / DNA polymerase alpha, subunit B, N-terminal / DNA polymerase alpha, subunit B / DNA primase, small subunit, eukaryotic/archaeal / DNA primase, large subunit, eukaryotic / DNA primase, small subunit / DNA primase small subunit / DNA primase large subunit, eukaryotic/archaeal / DNA polymerase alpha catalytic subunit, N-terminal domain ...DNA polymerase alpha, subunit B, N-terminal domain superfamily / DNA polymerase alpha subunit B N-terminal / DNA polymerase alpha, subunit B, N-terminal / DNA polymerase alpha, subunit B / DNA primase, small subunit, eukaryotic/archaeal / DNA primase, large subunit, eukaryotic / DNA primase, small subunit / DNA primase small subunit / DNA primase large subunit, eukaryotic/archaeal / DNA polymerase alpha catalytic subunit, N-terminal domain / DNA polymerase alpha, zinc finger domain superfamily / Eukaryotic and archaeal DNA primase, large subunit / DNA Polymerase alpha zinc finger / DNA polymerase alpha subunit p180 N terminal / Zinc finger, DNA-directed DNA polymerase, family B, alpha / DNA polymerase alpha catalytic subunit, catalytic domain / DNA polymerase alpha/delta/epsilon, subunit B / DNA polymerase alpha/epsilon subunit B / DNA polymerase family B, thumb domain / DNA polymerase family B signature. / DNA-directed DNA polymerase, family B, conserved site / DNA polymerase family B / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA-directed DNA polymerase, family B, multifunctional domain / DNA polymerase, palm domain superfamily / DNA polymerase type-B family / DNA-directed DNA polymerase, family B / Ribonuclease H superfamily / Ribonuclease H-like superfamily / DNA/RNA polymerase superfamily
Similarity search - Domain/homology
DNA polymerase alpha catalytic subunit / DNA primase small subunit / DNA primase large subunit / DNA polymerase alpha subunit B
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.07 Å
AuthorsYin Z / Pellegrini L
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Wellcome Trust221892/Z/20/Z United Kingdom
CitationJournal: FEBS J / Year: 2024
Title: CryoEM insights into RNA primer synthesis by the human primosome.
Authors: Zhan Yin / Mairi L Kilkenny / De-Sheng Ker / Luca Pellegrini /
Abstract: Eukaryotic DNA replication depends on the primosome - a complex of DNA polymerase alpha (Pol α) and primase - to initiate DNA synthesis by polymerisation of an RNA-DNA primer. Primer synthesis ...Eukaryotic DNA replication depends on the primosome - a complex of DNA polymerase alpha (Pol α) and primase - to initiate DNA synthesis by polymerisation of an RNA-DNA primer. Primer synthesis requires the tight coordination of primase and polymerase activities. Recent cryo-electron microscopy (cryoEM) analyses have elucidated the extensive conformational transitions required for RNA primer handover between primase and Pol α and primer elongation by Pol α. Because of the intrinsic flexibility of the primosome, however, structural information about the initiation of RNA primer synthesis is still lacking. Here, we capture cryoEM snapshots of the priming reaction to reveal the conformational trajectory of the human primosome that brings DNA primase subunits 1 and 2 (PRIM1 and PRIM2, respectively) together, poised for RNA synthesis. Furthermore, we provide experimental evidence for the continuous association of primase subunit PRIM2 with the RNA primer during primer synthesis, and for how both initiation and termination of RNA primer polymerisation are licenced by specific rearrangements of DNA polymerase alpha catalytic subunit (POLA1), the polymerase subunit of Pol α. Our findings fill a critical gap in our understanding of the conformational changes that underpin the synthesis of the RNA primer by the primosome. Together with existing evidence, they provide a complete description of the structural dynamics of the human primosome during DNA replication initiation.
History
DepositionJul 6, 2023-
Header (metadata) releaseFeb 21, 2024-
Map releaseFeb 21, 2024-
UpdateFeb 21, 2024-
Current statusFeb 21, 2024Processing site: PDBe / Status: Released

-
Structure visualization

Supplemental images

emd_17795.png

Downloads & links

-
Map

FileDownload / File: emd_17795.map.gz / Format: CCP4 / Size: 209.3 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.066 Å
Density
Contour LevelBy AUTHOR: 0.147
Minimum - Maximum-0.34298632 - 1.6732529
Average (Standard dev.)0.0004403696 (±0.018731037)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions380380380
Spacing380380380
CellA=B=C: 405.08 Å
α=β=γ: 90.0 °

-
Supplemental data

-
Mask #1

Fileemd_17795_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #1

Fileemd_17795_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Half map: #2

Fileemd_17795_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

-
Sample components

-
Entire : DNA polymerase alpha-primase with bound nucleotide

EntireName: DNA polymerase alpha-primase with bound nucleotide
Components
  • Complex: DNA polymerase alpha-primase with bound nucleotide

-
Supramolecule #1: DNA polymerase alpha-primase with bound nucleotide

SupramoleculeName: DNA polymerase alpha-primase with bound nucleotide / type: complex / ID: 1 / Parent: 0
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 287.5 KDa

-
Experimental details

-
Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

-
Sample preparation

Concentration0.29 mg/mL
BufferpH: 7.4
VitrificationCryogen name: ETHANE

-
Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.6 µm / Nominal defocus min: 1.0 µm
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 47.78 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

-
Image processing

Startup modelType of model: NONE
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC / Details: ab-initio models in
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC / Details: Non-uniform refinement
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.07 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 185009
FSC plot (resolution estimation)

+
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