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- EMDB-26298: RFC:PCNA bound to dsDNA with a ssDNA gap of six nucleotides -

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Basic information

Entry
Database: EMDB / ID: EMD-26298
TitleRFC:PCNA bound to dsDNA with a ssDNA gap of six nucleotides
Map dataDensity modified map
Sample
  • Complex: RFC bound to PCNA and DNA with a ssDNA gap of six nucleotides
    • Protein or peptide: x 6 types
    • DNA: x 3 types
  • Ligand: x 3 types
Keywordssliding clamp / DNA replication&repair / AAA+ / clamp loader / BRCT domain / REPLICATION / REPLICATION-DNA complex
Function / homology
Function and homology information


DNA clamp unloading / Rad17 RFC-like complex / Elg1 RFC-like complex / Mismatch repair (MMR) directed by MSH2:MSH6 (MutSalpha) / DNA replication factor C complex / Ctf18 RFC-like complex / meiotic mismatch repair / DNA clamp loader activity / Processive synthesis on the lagging strand / Removal of the Flap Intermediate ...DNA clamp unloading / Rad17 RFC-like complex / Elg1 RFC-like complex / Mismatch repair (MMR) directed by MSH2:MSH6 (MutSalpha) / DNA replication factor C complex / Ctf18 RFC-like complex / meiotic mismatch repair / DNA clamp loader activity / Processive synthesis on the lagging strand / Removal of the Flap Intermediate / Polymerase switching / positive regulation of DNA metabolic process / SUMOylation of DNA replication proteins / maintenance of DNA trinucleotide repeats / PCNA complex / establishment of mitotic sister chromatid cohesion / DNA replication checkpoint signaling / Activation of ATR in response to replication stress / lagging strand elongation / postreplication repair / sister chromatid cohesion / silent mating-type cassette heterochromatin formation / mitotic sister chromatid cohesion / leading strand elongation / DNA polymerase processivity factor activity / error-free translesion synthesis / Gap-filling DNA repair synthesis and ligation in TC-NER / subtelomeric heterochromatin formation / mismatch repair / translesion synthesis / positive regulation of DNA replication / positive regulation of DNA repair / replication fork / DNA damage checkpoint signaling / nucleotide-excision repair / DNA-templated DNA replication / mitotic cell cycle / chromosome, telomeric region / cell division / DNA repair / ATP hydrolysis activity / DNA binding / ATP binding / identical protein binding / nucleus / cytosol
Similarity search - Function
Replication factor C subunit 1 / DNA replication factor RFC1, C-terminal / Replication factor RFC1 C terminal domain / Replication factor C, C-terminal / Replication factor C C-terminal domain / : / DNA polymerase III, delta subunit / DNA polymerase III, clamp loader complex, gamma/delta/delta subunit, C-terminal / Proliferating cell nuclear antigen signature 2. / Proliferating cell nuclear antigen, PCNA, conserved site ...Replication factor C subunit 1 / DNA replication factor RFC1, C-terminal / Replication factor RFC1 C terminal domain / Replication factor C, C-terminal / Replication factor C C-terminal domain / : / DNA polymerase III, delta subunit / DNA polymerase III, clamp loader complex, gamma/delta/delta subunit, C-terminal / Proliferating cell nuclear antigen signature 2. / Proliferating cell nuclear antigen, PCNA, conserved site / Proliferating cell nuclear antigen signature 1. / Proliferating cell nuclear antigen, PCNA / Proliferating cell nuclear antigen, PCNA, N-terminal / Proliferating cell nuclear antigen, PCNA, C-terminal / Proliferating cell nuclear antigen, N-terminal domain / Proliferating cell nuclear antigen, C-terminal domain / : / BRCA1 C Terminus (BRCT) domain / breast cancer carboxy-terminal domain / BRCT domain profile. / BRCT domain / BRCT domain superfamily / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Proliferating cell nuclear antigen / Replication factor C subunit 5 / Replication factor C subunit 3 / Replication factor C subunit 1 / Replication factor C subunit 4 / Replication factor C subunit 2
Similarity search - Component
Biological speciesSaccharomyces cerevisiae (brewer's yeast) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsLiu X / Gaubitz C
Funding support United States, Switzerland, 3 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01-GM127776 United States
Swiss National Science Foundation168972 Switzerland
Swiss National Science Foundation177859 Switzerland
CitationJournal: Elife / Year: 2022
Title: A second DNA binding site on RFC facilitates clamp loading at gapped or nicked DNA.
Authors: Xingchen Liu / Christl Gaubitz / Joshua Pajak / Brian A Kelch /
Abstract: Clamp loaders place circular sliding clamp proteins onto DNA so that clamp-binding partner proteins can synthesize, scan, and repair the genome. DNA with nicks or small single-stranded gaps are ...Clamp loaders place circular sliding clamp proteins onto DNA so that clamp-binding partner proteins can synthesize, scan, and repair the genome. DNA with nicks or small single-stranded gaps are common clamp-loading targets in DNA repair, yet these substrates would be sterically blocked given the known mechanism for binding of primer-template DNA. Here, we report the discovery of a second DNA binding site in the yeast clamp loader replication factor C (RFC) that aids in binding to nicked or gapped DNA. This DNA binding site is on the external surface and is only accessible in the open conformation of RFC. Initial DNA binding at this site thus provides access to the primary DNA binding site in the central chamber. Furthermore, we identify that this site can partially unwind DNA to create an extended single-stranded gap for DNA binding in RFC's central chamber and subsequent ATPase activation. Finally, we show that deletion of the BRCT domain, a major component of the external DNA binding site, results in defective yeast growth in the presence of DNA damage where nicked or gapped DNA intermediates occur. We propose that RFC's external DNA binding site acts to enhance DNA binding and clamp loading, particularly at DNA architectures typically found in DNA repair.
History
DepositionFeb 20, 2022-
Header (metadata) releaseJul 6, 2022-
Map releaseJul 6, 2022-
UpdateFeb 21, 2024-
Current statusFeb 21, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_26298.png

Downloads & links

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Map

FileDownload / File: emd_26298.map.gz / Format: CCP4 / Size: 17.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationDensity modified map
Voxel sizeX=Y=Z: 0.87 Å
Density
Contour LevelBy AUTHOR: 0.85
Minimum - Maximum-9.133965999999999 - 15.596614000000001
Average (Standard dev.)0.000000000022749 (±1.0)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderZYX
Origin808388
Dimensions161153182
Spacing182161153
CellA: 158.34 Å / B: 140.07 Å / C: 133.11 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: #1

Fileemd_26298_additional_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_26298_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_26298_half_map_2.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 : RFC bound to PCNA and DNA with a ssDNA gap of six nucleotides

EntireName: RFC bound to PCNA and DNA with a ssDNA gap of six nucleotides
Components
  • Complex: RFC bound to PCNA and DNA with a ssDNA gap of six nucleotides
    • Protein or peptide: Replication factor C subunit 1
    • Protein or peptide: Replication factor C subunit 4
    • Protein or peptide: Replication factor C subunit 3
    • Protein or peptide: Replication factor C subunit 2
    • Protein or peptide: Replication factor C subunit 5
    • Protein or peptide: Proliferating cell nuclear antigen
    • DNA: DNA - Primer
    • DNA: DNA - Template
    • DNA: DNA - non primer
  • Ligand: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-DIPHOSPHATE

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Supramolecule #1: RFC bound to PCNA and DNA with a ssDNA gap of six nucleotides

SupramoleculeName: RFC bound to PCNA and DNA with a ssDNA gap of six nucleotides
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#9
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 365 KDa

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Macromolecule #1: Replication factor C subunit 1

MacromoleculeName: Replication factor C subunit 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 95.048195 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MVNISDFFGK NKKSVRSSTS RPTRQVGSSK PEVIDLDTES DQESTNKTPK KMPVSNVIDV SETPEGEKKL PLPAKRKASS PTVKPASSK KTKPSSKSSD SASNITAQDV LDKIPSLDLS NVHVKENAKF DFKSANSNAD PDEIVSEIGS FPEGKPNCLL G LTIVFTGV ...String:
MVNISDFFGK NKKSVRSSTS RPTRQVGSSK PEVIDLDTES DQESTNKTPK KMPVSNVIDV SETPEGEKKL PLPAKRKASS PTVKPASSK KTKPSSKSSD SASNITAQDV LDKIPSLDLS NVHVKENAKF DFKSANSNAD PDEIVSEIGS FPEGKPNCLL G LTIVFTGV LPTLERGASE ALAKRYGARV TKSISSKTSV VVLGDEAGPK KLEKIKQLKI KAIDEEGFKQ LIAGMPAEGG DG EAAEKAR RKLEEQHNIA TKEAELLVKK EEERSKKLAA TRVSGGHLER DNVVREEDKL WTVKYAPTNL QQVCGNKGSV MKL KNWLAN WENSKKNSFK HAGKDGSGVF RAAMLYGPPG IGKTTAAHLV AQELGYDILE QNASDVRSKT LLNAGVKNAL DNMS VVGYF KHNEEAQNLN GKHFVIIMDE VDGMSGGDRG GVGQLAQFCR KTSTPLILIC NERNLPKMRP FDRVCLDIQF RRPDA NSIK SRLMTIAIRE KFKLDPNVID RLIQTTRGDI RQVINLLSTI STTTKTINHE NINEISKAWE KNIALKPFDI AHKMLD GQI YSDIGSRNFT LNDKIALYFD DFDFTPLMIQ ENYLSTRPSV LKPGQSHLEA VAEAANCISL GDIVEKKIRS SEQLWSL LP LHAVLSSVYP ASKVAGHMAG RINFTAWLGQ NSKSAKYYRL LQEIHYHTRL GTSTDKIGLR LDYLPTFRKR LLDPFLKQ G ADAISSVIEV MDDYYLTKED WDSIMEFFVG PDVTTAIIKK IPATVKSGFT RKYNSMTHPV AIYRTGSTIG GGGVGTSTS TPDFEDVVDA DDNPVPADDE ETQDSSTDLK KDKLIKQKAK PTKRKTATSK PGGSKKRKTK A

UniProtKB: Replication factor C subunit 1

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Macromolecule #2: Replication factor C subunit 4

MacromoleculeName: Replication factor C subunit 4 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 36.201039 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MSKTLSLQLP WVEKYRPQVL SDIVGNKETI DRLQQIAKDG NMPHMIISGM PGIGKTTSVH CLAHELLGRS YADGVLELNA SDDRGIDVV RNQIKHFAQK KLHLPPGKHK IVILDEADSM TAGAQQALRR TMELYSNSTR FAFACNQSNK IIEPLQSRCA I LRYSKLSD ...String:
MSKTLSLQLP WVEKYRPQVL SDIVGNKETI DRLQQIAKDG NMPHMIISGM PGIGKTTSVH CLAHELLGRS YADGVLELNA SDDRGIDVV RNQIKHFAQK KLHLPPGKHK IVILDEADSM TAGAQQALRR TMELYSNSTR FAFACNQSNK IIEPLQSRCA I LRYSKLSD EDVLKRLLQI IKLEDVKYTN DGLEAIIFTA EGDMRQAINN LQSTVAGHGL VNADNVFKIV DSPHPLIVKK ML LASNLED SIQILRTDLW KKGYSSIDIV TTSFRVTKNL AQVKESVRLE MIKEIGLTHM RILEGVGTYL QLASMLAKIH KLN NKA

UniProtKB: Replication factor C subunit 4

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Macromolecule #3: Replication factor C subunit 3

MacromoleculeName: Replication factor C subunit 3 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 38.254543 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MSTSTEKRSK ENLPWVEKYR PETLDEVYGQ NEVITTVRKF VDEGKLPHLL FYGPPGTGKT STIVALAREI YGKNYSNMVL ELNASDDRG IDVVRNQIKD FASTRQIFSK GFKLIILDEA DAMTNAAQNA LRRVIERYTK NTRFCVLANY AHKLTPALLS R CTRFRFQP ...String:
MSTSTEKRSK ENLPWVEKYR PETLDEVYGQ NEVITTVRKF VDEGKLPHLL FYGPPGTGKT STIVALAREI YGKNYSNMVL ELNASDDRG IDVVRNQIKD FASTRQIFSK GFKLIILDEA DAMTNAAQNA LRRVIERYTK NTRFCVLANY AHKLTPALLS R CTRFRFQP LPQEAIERRI ANVLVHEKLK LSPNAEKALI ELSNGDMRRV LNVLQSCKAT LDNPDEDEIS DDVIYECCGA PR PSDLKAV LKSILEDDWG TAHYTLNKVR SAKGLALIDL IEGIVKILED YELQNEETRV HLLTKLADIE YSISKGGNDQ IQG SAVIGA IKASFENETV KANV

UniProtKB: Replication factor C subunit 3

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Macromolecule #4: Replication factor C subunit 2

MacromoleculeName: Replication factor C subunit 2 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 39.794473 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MFEGFGPNKK RKISKLAAEQ SLAQQPWVEK YRPKNLDEVT AQDHAVTVLK KTLKSANLPH MLFYGPPGTG KTSTILALTK ELYGPDLMK SRILELNASD ERGISIVREK VKNFARLTVS KPSKHDLENY PCPPYKIIIL DEADSMTADA QSALRRTMET Y SGVTRFCL ...String:
MFEGFGPNKK RKISKLAAEQ SLAQQPWVEK YRPKNLDEVT AQDHAVTVLK KTLKSANLPH MLFYGPPGTG KTSTILALTK ELYGPDLMK SRILELNASD ERGISIVREK VKNFARLTVS KPSKHDLENY PCPPYKIIIL DEADSMTADA QSALRRTMET Y SGVTRFCL ICNYVTRIID PLASRCSKFR FKALDASNAI DRLRFISEQE NVKCDDGVLE RILDISAGDL RRGITLLQSA SK GAQYLGD GKNITSTQVE ELAGVVPHDI LIEIVEKVKS GDFDEIKKYV NTFMKSGWSA ASVVNQLHEY YITNDNFDTN FKN QISWLL FTTDSRLNNG TNEHIQLLNL LVKISQL

UniProtKB: Replication factor C subunit 2

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Macromolecule #5: Replication factor C subunit 5

MacromoleculeName: Replication factor C subunit 5 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 39.993582 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MSLWVDKYRP KSLNALSHNE ELTNFLKSLS DQPRDLPHLL LYGPNGTGKK TRCMALLESI FGPGVYRLKI DVRQFVTASN RKLELNVVS SPYHLEITPS DMGNNDRIVI QELLKEVAQM EQVDFQDSKD GLAHRYKCVI INEANSLTKD AQAALRRTME K YSKNIRLI ...String:
MSLWVDKYRP KSLNALSHNE ELTNFLKSLS DQPRDLPHLL LYGPNGTGKK TRCMALLESI FGPGVYRLKI DVRQFVTASN RKLELNVVS SPYHLEITPS DMGNNDRIVI QELLKEVAQM EQVDFQDSKD GLAHRYKCVI INEANSLTKD AQAALRRTME K YSKNIRLI MVCDSMSPII APIKSRCLLI RCPAPSDSEI STILSDVVTN ERIQLETKDI LKRIAQASNG NLRVSLLMLE SM ALNNELA LKSSSPIIKP DWIIVIHKLT RKIVKERSVN SLIECRAVLY DLLAHCIPAN IILKELTFSL LDVETLNTTN KSS IIEYSS VFDERLSLGN KAIFHLEGFI AKVMCCLD

UniProtKB: Replication factor C subunit 5

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Macromolecule #6: Proliferating cell nuclear antigen

MacromoleculeName: Proliferating cell nuclear antigen / type: protein_or_peptide / ID: 6 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 29.525713 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: GPHMASMLEA KFEEASLFKR IIDGFKDCVQ LVNFQCKEDG IIAQAVDDSR VLLVSLEIGV EAFQEYRCDH PVTLGMDLTS LSKILRCGN NTDTLTLIAD NTPDSIILLF EDTKKDRIAE YSLKLMDIDA DFLKIEELQY DSTLSLPSSE FSKIVRDLSQ L SDSINIMI ...String:
GPHMASMLEA KFEEASLFKR IIDGFKDCVQ LVNFQCKEDG IIAQAVDDSR VLLVSLEIGV EAFQEYRCDH PVTLGMDLTS LSKILRCGN NTDTLTLIAD NTPDSIILLF EDTKKDRIAE YSLKLMDIDA DFLKIEELQY DSTLSLPSSE FSKIVRDLSQ L SDSINIMI TKETIKFVAD GDIGSGSVII KPFVDMEHPE TSIKLEMDQP VDLTFGAKYL LDIIKGSSLS DRVGIRLSSE AP ALFQFDL KSGFLQFFLA PKFNDEE

UniProtKB: Proliferating cell nuclear antigen

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Macromolecule #7: DNA - Primer

MacromoleculeName: DNA - Primer / type: dna / ID: 7 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 7.429794 KDa
SequenceString:
(DG)(DG)(DG)(DA)(DC)(DG)(DC)(DA)(DC)(DG) (DC)(DG)(DG)(DC)(DA)(DT)(DT)(DC)(DA)(DA) (DG)(DG)(DA)(DC)

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Macromolecule #8: DNA - Template

MacromoleculeName: DNA - Template / type: dna / ID: 8 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 15.417887 KDa
SequenceString:
(DT)(DT)(DG)(DT)(DG)(DG)(DG)(DT)(DA)(DG) (DA)(DT)(DA)(DA)(DA)(DT)(DA)(DC)(DA)(DG) (DA)(DC)(DC)(DT)(DA)(DA)(DG)(DT)(DC) (DC)(DT)(DT)(DG)(DA)(DA)(DT)(DG)(DC)(DC) (DG) (DC)(DG)(DT)(DG)(DC)(DG)(DT)(DC) (DC)(DC)

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Macromolecule #9: DNA - non primer

MacromoleculeName: DNA - non primer / type: dna / ID: 9 / Number of copies: 1 / Classification: DNA
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 6.027929 KDa
SequenceString:
(DC)(DT)(DG)(DT)(DA)(DT)(DT)(DT)(DA)(DT) (DC)(DT)(DA)(DC)(DC)(DC)(DA)(DC)(DA)(DA)

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Macromolecule #10: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER

MacromoleculeName: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / type: ligand / ID: 10 / Number of copies: 3 / Formula: AGS
Molecular weightTheoretical: 523.247 Da
Chemical component information

ChemComp-AGS:
PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / ATP-gamma-S, energy-carrying molecule analogue*YM

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Macromolecule #11: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 11 / Number of copies: 4 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #12: ADENOSINE-5'-DIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 12 / Number of copies: 2 / Formula: ADP
Molecular weightTheoretical: 427.201 Da
Chemical component information

ChemComp-ADP:
ADENOSINE-5'-DIPHOSPHATE / ADP, energy-carrying molecule*YM / Adenosine diphosphate

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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

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS TALOS
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.0 µm
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Average electron dose: 45.0 e/Å2

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Image processing

Particle selectionNumber selected: 797499
Startup modelType of model: EMDB MAP
EMDB ID:

25617

Initial angle assignmentType: RANDOM ASSIGNMENT / Software - Name: RELION
Final 3D classificationSoftware - Name: RELION
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 130421
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7tid


Chain - Source name: PDB / Chain - Initial model type: experimental model
Output model

PDB-7u1a:
RFC:PCNA bound to dsDNA with a ssDNA gap of six nucleotides

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