6PTN

Structure of Ctf4 trimer in complex with two CMG helicases

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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Literature

Ctf4 organizes sister replisomes and Pol alpha into a replication factory.

Yuan, Z., Georgescu, R., Santos, R.L.A., Zhang, D., Bai, L., Yao, N.Y., Zhao, G., O'Donnell, M.E., Li, H.

(2019) Elife 8

  • DOI: 10.7554/eLife.47405
  • Primary Citation of Related Structures:  
    6PTJ, 6PTO, 6PTN

  • PubMed Abstract: 

    • The current view is that eukaryotic replisomes are independent. Here we show that Ctf4 tightly dimerizes CMG helicase, with an extensive interface involving Psf2, Cdc45, and Sld5. Interestingly, Ctf4 binds only one Pol α-primase. Thus, Ctf4 may have evol ...

    The current view is that eukaryotic replisomes are independent. Here we show that Ctf4 tightly dimerizes CMG helicase, with an extensive interface involving Psf2, Cdc45, and Sld5. Interestingly, Ctf4 binds only one Pol α-primase. Thus, Ctf4 may have evolved as a trimer to organize two helicases and one Pol α-primase into a replication factory. In the 2CMG-Ctf4 3 -1Pol α-primase factory model, the two CMGs nearly face each other, placing the two lagging strands toward the center and two leading strands out the sides. The single Pol α-primase is centrally located and may prime both sister replisomes. The Ctf4-coupled-sister replisome model is consistent with cellular microscopy studies revealing two sister forks of an origin remain attached and are pushed forward from a protein platform. The replication factory model may facilitate parental nucleosome transfer during replication.

    Organizational Affiliation: 

    Structural Biology Program, Van Andel Institute, Grand Rapids, United States.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase alpha-binding protein E, F, G927Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: CTF4, CHL15, POB1, YPR135W, P9659.7
Find proteins for Q01454 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF1 A, a208Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: PSF1, YDR013W, PZA208, YD8119.18
Find proteins for Q12488 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF2 B, b213Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: PSF2, YJL072C, HRF213, J1086
Find proteins for P40359 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF3 C, c194Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: PSF3, YOL146W
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein SLD5 D, d294Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: SLD5, YDR489W
Find proteins for Q03406 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division control protein 45 H, h650Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: CDC45, SLD4, YLR103C, L8004.11
Find proteins for Q08032 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM2 2, i868Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM2, YBL023C, YBL0438
EC: 3.6.4.12
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM3 3, j971Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM3, YEL032W, SYGP-ORF23
EC: 3.6.4.12
Find proteins for P24279 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 9
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DNA replication licensing factor MCM4 4, k933Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM4, CDC54, HCD21, YPR019W, YP9531.13
EC: 3.6.4.12
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Minichromosome maintenance protein 5 5, l775Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM5, CDC46, YLR274W, L9328.1
EC: 3.6.4.12
Find proteins for P29496 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 11
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DNA replication licensing factor MCM6 6, m1017Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM6, YGL201C
EC: 3.6.4.12
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Entity ID: 12
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DNA replication licensing factor MCM7 7, n845Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM7, CDC47, YBR202W, YBR1441
EC: 3.6.4.12
Find proteins for P38132 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesGM111472
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesOD12272
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesGM45436

Revision History 

  • Version 1.0: 2019-11-20
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Author supporting evidence