3U60

Structure of T4 Bacteriophage Clamp Loader Bound To Open Clamp, DNA and ATP Analog

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.34 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.246 

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Literature

How a DNA polymerase clamp loader opens a sliding clamp.

Kelch, B.A., Makino, D.L., O'Donnell, M., Kuriyan, J.

(2011) Science 334: 1675-1680

  • DOI: https://doi.org/10.1126/science.1211884
  • Primary Citation of Related Structures:  
    3U5Z, 3U60, 3U61

  • PubMed Abstract: 

    • Processive chromosomal replication relies on sliding DNA clamps, which are loaded onto DNA by pentameric clamp loader complexes belonging to the AAA+ family of adenosine triphosphatases (ATPases). We present structures for the ATP-bound state of the clamp loader complex from bacteriophage T4, bound to an open clamp and primer-template DNA ...

    Processive chromosomal replication relies on sliding DNA clamps, which are loaded onto DNA by pentameric clamp loader complexes belonging to the AAA+ family of adenosine triphosphatases (ATPases). We present structures for the ATP-bound state of the clamp loader complex from bacteriophage T4, bound to an open clamp and primer-template DNA. The clamp loader traps a spiral conformation of the open clamp so that both the loader and the clamp match the helical symmetry of DNA. One structure reveals that ATP has been hydrolyzed in one subunit and suggests that clamp closure and ejection of the loader involves disruption of the ATP-dependent match in symmetry. The structures explain how synergy among the loader, the clamp, and DNA can trigger ATP hydrolysis and release of the closed clamp on DNA.

    Organizational Affiliation: 

    Department of Molecular and Cell Biology and California Institute for Quantitative Biosciences, University of California, Berkeley, CA 94720, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase accessory protein 44A [auth B],
B [auth C],
C [auth D],
D [auth E]		324Tequatrovirus T4Mutation(s): 0 
Gene Names: 44, gp44
EC: 3.6.4
UniProt
Find proteins for P04526 (Enterobacteria phage T4)
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Go to UniProtKB:  P04526
Entity Groups  
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UniProt GroupP04526
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase accessory protein 62G [auth A]195Tequatrovirus T4Mutation(s): 0 
Gene Names: 62, gp62
UniProt
Find proteins for P04527 (Enterobacteria phage T4)
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Go to UniProtKB:  P04527
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UniProt GroupP04527
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase processivity componentH [auth G],
I [auth H],
J [auth F]		228Tequatrovirus T4Mutation(s): 0 
Gene Names: 45, gp45
UniProt
Find proteins for P04525 (Enterobacteria phage T4)
Explore P04525 
Go to UniProtKB:  P04525
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UniProt GroupP04525
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Entity ID: 2
MoleculeChainsLengthOrganismImage
Template DNA strandE [auth I]30N/A
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Entity ID: 3
MoleculeChainsLengthOrganismImage
Primer DNA strandF [auth J]20N/A
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
08T
Query on 08T
Download Ideal Coordinates CCD File 
K [auth B],
M [auth C],
O [auth D]		[[[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]oxy-oxidanyl-phosphoryl]oxy-tris(fluoranyl)beryllium
C10 H14 Be F3 N5 O10 P2
WOGYHYSOODLXII-KWIZKVQNSA-J		 Ligand Interaction
ADP
Query on ADP
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Q [auth E]ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N		 Ligand Interaction
MG
Query on MG
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L [auth B],
N [auth C],
P [auth D],
R [auth E]		MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE		H [auth G],
I [auth H],
J [auth F]		L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.34 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.246 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.518α = 90
b = 118.443β = 102.06
c = 133.078γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-01-04
    Type: Initial release