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- EMDB-72342: NER dual incision complex - noG focused Core7 map -

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Basic information

Entry
Database: EMDB / ID: EMD-72342
TitleNER dual incision complex - noG focused Core7 map
Map datanoG focus Core7 map
Sample
  • Complex: NER dual incision complex without XPG
KeywordsNER / XPA / XPG / XPF / DNA binding protein
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.3 Å
AuthorsKim J / Li CL / Yang W
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)DK075037 United States
CitationJournal: Nature / Year: 2026
Title: Pre-incision structures reveal principles of DNA nucleotide excision repair.
Authors: Eric C L Li / Jinseok Kim / Sem J Brussee / Kaoru Sugasawa / Martijn S Luijsterburg / Wei Yang /
Abstract: Nucleotide excision repair (NER) removes bulky adducts from genomic DNA and prevents the ultraviolet light-sensitivity disease xeroderma pigmentosum, cancer and premature ageing. After initial lesion ...Nucleotide excision repair (NER) removes bulky adducts from genomic DNA and prevents the ultraviolet light-sensitivity disease xeroderma pigmentosum, cancer and premature ageing. After initial lesion recognition by XPC in global genome repair or by stalled RNA polymerases in transcription-coupled repair, a lesion and surrounding DNA duplex are unwound by TFIIH, which includes the ATPases XPB and XPD, and additional NER factors XPA, XPF, XPG and RPA, to form a DNA bubble comprising around 27 nucleotides. The double strand-single strand (ds-ss) junction-specific endonucleases XPF and XPG cleave DNA on the 5' and 3' sides of the lesion, respectively. Here we report the functional steps and atomic structures of the ATPase-driven and lesion-dependent DNA bubble formation and arrangement of the complete NER factors for dual incision. The unwinding of nearly 30 base pairs of DNA depends mainly on the double strand DNA translocase XPB and the duplex dividers XPA and XPF. XPD binds the lesion strand with XPF at the 5' ds-ss junction. XPF cuts the lesion strand only after XPG binds the 3' ds-ss junction. The ERCC1 subunit of XPF facilitates DNA strand separation and recruitment of RPA to the non-lesion strand. These findings provide insights on the causes of human diseases and potential targets for enhancing chemotherapeutic efficacy.
History
DepositionAug 26, 2025-
Header (metadata) releaseFeb 18, 2026-
Map releaseFeb 18, 2026-
UpdateMay 6, 2026-
Current statusMay 6, 2026Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_72342.png

Downloads & links

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Map

FileDownload / File: emd_72342.map.gz / Format: CCP4 / Size: 40.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationnoG focus Core7 map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.66 Å/pix.
x 220 pix.
= 365.2 Å		1.66 Å/pix.
x 220 pix.
= 365.2 Å		1.66 Å/pix.
x 220 pix.
= 365.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.66 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.023
Minimum - Maximum-0.01960996 - 0.08612964
Average (Standard dev.)0.00041377536 (±0.004064591)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions220220220
Spacing220220220
CellA=B=C: 365.19998 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Additional Map

Fileemd_72342_additional_1.map
AnnotationAdditional Map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: noG focus Core7 half1 map

Fileemd_72342_half_map_1.map
AnnotationnoG focus Core7 half1 map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: noG focus Core7 half2 map

Fileemd_72342_half_map_2.map
AnnotationnoG focus Core7 half2 map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : NER dual incision complex without XPG

EntireName: NER dual incision complex without XPG
Components
  • Complex: NER dual incision complex without XPG

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Supramolecule #1: NER dual incision complex without XPG

SupramoleculeName: NER dual incision complex without XPG / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#15
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 880 KDa

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration0.6 mg/mL
BufferpH: 7.9
Component:
ConcentrationFormulaName
25.0 mMHEPES(4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid)
100.0 mMKClPotassium Chloride
2.0 mMCaCl2Calcium Chloride
2.0 mMTCEP(Tris(2-carboxyethyl)phospine)
1.0 %GlycerolGlycerol
0.05 %C14H28O6Octyl Glucoside
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 55.8 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.4 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 105000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: Gctf / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 4.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 4.0) / Number images used: 74129
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 4.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 4.0)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

8ebs

source_name: PDB, initial_model_type: experimental model

8ebt

source_name: PDB, initial_model_type: experimental model

8ebu

source_name: PDB, initial_model_type: experimental model
RefinementSpace: REAL / Protocol: AB INITIO MODEL

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