7PFO image
Deposition Date 2021-08-11
Release Date 2021-11-10
Last Version Date 2025-07-09
Entry Detail
PDB ID:
7PFO
Keywords:
REPLICATION
Title:
Core human replisome
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Trichoplusia ni
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.20 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
7PFO validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication licensing factor MCM2
Gene (Uniprot):MCM2
Chain IDs:A (auth: 2)
Chain Length:904
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P49736 Pfam ID:PF12619, PF14551, PF17207, PF00493, PF17855
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication licensing factor MCM3
Gene (Uniprot):MCM3
Chain IDs:B (auth: 3)
Chain Length:808
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P25205 Pfam ID:PF14551, PF17207, PF00493, PF17855
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication licensing factor MCM4
Gene (Uniprot):MCM4
Chain IDs:C (auth: 4)
Chain Length:863
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P33991 Pfam ID:PF14551, PF17207, PF00493, PF17855
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication licensing factor MCM5
Gene (Uniprot):MCM5
Chain IDs:D (auth: 5)
Chain Length:734
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P33992 Pfam ID:PF14551, PF17207, PF00493, PF17855, PF21933
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication licensing factor MCM6
Gene (Uniprot):MCM6
Chain IDs:E (auth: 6)
Chain Length:821
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q14566 Pfam ID:PF14551, PF17207, PF00493, PF17855, PF18263
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication licensing factor MCM7
Gene (Uniprot):MCM7
Chain IDs:F (auth: 7)
Chain Length:719
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P33993 Pfam ID:PF14551, PF17207, PF00493, PF17855
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA polymerase epsilon subunit 2
Gene (Uniprot):POLE2
Chain IDs:G (auth: A)
Chain Length:527
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P56282 Pfam ID:PF12213, PF04042 EC:2.7.7.7
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA polymerase epsilon catalytic subunit A
Gene (Uniprot):POLE
Chain IDs:H (auth: B)
Chain Length:2286
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q07864 Pfam ID:PF03104, PF22634, PF08490, PF22912 EC:2.7.7.7
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Cell division control protein 45 homolog
Gene (Uniprot):CDC45
Chain IDs:I (auth: C)
Chain Length:569
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:O75419 Pfam ID:PF02724
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication complex GINS protein PSF1
Gene (Uniprot):GINS1
Chain IDs:J (auth: D)
Chain Length:196
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q14691 Pfam ID:PF05916
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication complex GINS protein PSF2
Gene (Uniprot):GINS2
Chain IDs:K (auth: E)
Chain Length:185
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9Y248 Pfam ID:PF05916
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication complex GINS protein PSF3
Gene (Uniprot):GINS3
Chain IDs:L (auth: F)
Chain Length:216
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9BRX5 Pfam ID:PF22466, PF05916
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication complex GINS protein SLD5
Gene (Uniprot):GINS4
Chain IDs:M (auth: G)
Chain Length:262
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9BRT9 Pfam ID:PF05916, PF16922
Protein Blast
Polymer Type:polypeptide(L)
Molecule:WD repeat and HMG-box DNA-binding protein 1
Gene (Uniprot):WDHD1
Chain IDs:N (auth: H), O (auth: I), P (auth: J)
Chain Length:1161
Number of Molecules:3
Biological Source:Homo sapiens
UniProt ID:O75717 Pfam ID:PF00400, PF12894, PF12341, PF20946
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Protein timeless homolog
Gene (Uniprot):TIMELESS
Chain IDs:Q (auth: K)
Chain Length:1209
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9UNS1 Pfam ID:PF04821, PF05029
Protein Blast
Polymer Type:polypeptide(L)
Molecule:TIMELESS-interacting protein
Gene (Uniprot):TIPIN
Chain IDs:R (auth: L)
Chain Length:301
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9BVW5 Pfam ID:PF07962
Polymer Type:polydeoxyribonucleotide
Molecule:Leading strand DNA
Chain IDs:S (auth: M)
Chain Length:85
Number of Molecules:1
Biological Source:Homo sapiens
Polymer Type:polydeoxyribonucleotide
Molecule:Lagging Strand DNA
Chain IDs:T (auth: N)
Chain Length:54
Number of Molecules:1
Biological Source:Homo sapiens
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Claspin
Gene (Uniprot):CLSPN
Chain IDs:U (auth: Q)
Chain Length:1371
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9HAW4
Ligand Molecules
ANP
MG
SO4
ZN
Primary Citation
Structure of a human replisome shows the organisation and interactions of a DNA replication machine.
Embo J. 40 e108819 e108819 (2021)
PMID: 34694004 DOI: 10.15252/embj.2021108819

Abstact

The human replisome is an elaborate arrangement of molecular machines responsible for accurate chromosome replication. At its heart is the CDC45-MCM-GINS (CMG) helicase, which, in addition to unwinding the parental DNA duplex, arranges many proteins including the leading-strand polymerase Pol ε, together with TIMELESS-TIPIN, CLASPIN and AND-1 that have key and varied roles in maintaining smooth replisome progression. How these proteins are coordinated in the human replisome is poorly understood. We have determined a 3.2 Å cryo-EM structure of a human replisome comprising CMG, Pol ε, TIMELESS-TIPIN, CLASPIN and AND-1 bound to replication fork DNA. The structure permits a detailed understanding of how AND-1, TIMELESS-TIPIN and Pol ε engage CMG, reveals how CLASPIN binds to multiple replisome components and identifies the position of the Pol ε catalytic domain. Furthermore, the intricate network of contacts contributed by MCM subunits and TIMELESS-TIPIN with replication fork DNA suggests a mechanism for strand separation.

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Primary Citation of related structures
7PFO