5V8F image
Deposition Date 2017-03-21
Release Date 2017-05-10
Last Version Date 2024-10-09
Entry Detail
PDB ID:
5V8F
Keywords:
REPLICATION
Title:
Structural basis of MCM2-7 replicative helicase loading by ORC-Cdc6 and Cdt1
Biological Source:
Source Organism:
Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Taxon ID: 559292)
synthetic construct (Taxon ID: 32630)
Host Organism:
Saccharomyces cerevisiae
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
3.90 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
5V8F 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:868
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P29469 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:971
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P24279 Pfam ID:PF14551, PF17207, PF00493, PF17855, PF22207
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA replication licensing factor MCM4
Gene (Uniprot):MCM4
Chain IDs:C (auth: 4)
Chain Length:933
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P30665 Pfam ID:PF14551, PF17207, PF00493, PF17855, PF21128
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Minichromosome maintenance protein 5
Gene (Uniprot):MCM5
Chain IDs:D (auth: 5)
Chain Length:775
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P29496 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:1017
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P53091 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:800
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P38132 Pfam ID:PF14551, PF17207, PF00493, PF17855
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Cell division cycle protein CDT1
Gene (Uniprot):TAH11
Chain IDs:G (auth: 8)
Chain Length:604
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P47112 Pfam ID:PF16679
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Cell division control protein 6
Gene (Uniprot):CDC6
Chain IDs:H (auth: 9)
Chain Length:513
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P09119 Pfam ID:PF13401, PF22606, PF09079
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Origin recognition complex subunit 1
Gene (Uniprot):ORC1
Chain IDs:I (auth: A)
Chain Length:913
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P54784 Pfam ID:PF01426, PF00004, PF17872, PF21312
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Origin recognition complex subunit 2
Gene (Uniprot):ORC2
Chain IDs:J (auth: B)
Chain Length:620
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P32833 Pfam ID:PF04084
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Origin recognition complex subunit 3
Gene (Uniprot):ORC3
Chain IDs:K (auth: C)
Chain Length:616
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P54790 Pfam ID:PF07034, PF18137
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Origin recognition complex subunit 4
Gene (Uniprot):ORC4
Chain IDs:M (auth: D)
Chain Length:529
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P54791 Pfam ID:PF14629
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Origin recognition complex subunit 5
Gene (Uniprot):ORC5
Chain IDs:L (auth: E)
Chain Length:479
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P50874 Pfam ID:PF13191, PF21639, PF14630
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Origin recognition complex subunit 6
Gene (Uniprot):ORC6
Chain IDs:N (auth: F)
Chain Length:435
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
UniProt ID:P38826 Pfam ID:PF05460
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (39-MER)
Chain IDs:O (auth: M)
Chain Length:39
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (39-MER)
Chain IDs:P (auth: N)
Chain Length:39
Number of Molecules:1
Biological Source:synthetic construct
Ligand Molecules
AGS
Primary Citation
Structural basis of Mcm2-7 replicative helicase loading by ORC-Cdc6 and Cdt1.
Nat. Struct. Mol. Biol. 24 316 324 (2017)
PMID: 28191893 DOI: 10.1038/nsmb.3372

Abstact

To initiate DNA replication, the origin recognition complex (ORC) and Cdc6 load an Mcm2-7 double hexamer onto DNA. Without ATP hydrolysis, ORC-Cdc6 recruits one Cdt1-bound Mcm2-7 hexamer, thus forming an ORC-Cdc6-Cdt1-Mcm2-7 (OCCM) helicase-loading intermediate. Here we report a 3.9-Å structure of Saccharomyces cerevisiae OCCM on DNA. Flexible Mcm2-7 winged-helix domains (WHDs) engage ORC-Cdc6. A three-domain Cdt1 configuration embraces Mcm2, Mcm4, and Mcm6, thus comprising nearly half of the hexamer. The Cdt1 C-terminal domain extends to the Mcm6 WHD, which binds the Orc4 WHD. DNA passes through the ORC-Cdc6 and Mcm2-7 rings. Origin DNA interaction is mediated by an α-helix within Orc4 and positively charged loops within Orc2 and Cdc6. The Mcm2-7 C-tier AAA+ ring is topologically closed by an Mcm5 loop that embraces Mcm2, but the N-tier-ring Mcm2-Mcm5 interface remains open. This structure suggests a loading mechanism of the first Cdt1-bound Mcm2-7 hexamer by ORC-Cdc6.

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Disease

Primary Citation of related structures
5V8F