7M0A

Incomplete in crystallo incorporation by DNA Polymerase Lambda bound to blunt-ended DSB substrate and incoming dTTP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Analysis of diverse double-strand break synapsis with Pol lambda reveals basis for unique substrate specificity in nonhomologous end-joining.

Kaminski, A.M.Chiruvella, K.K.Ramsden, D.A.Bebenek, K.Kunkel, T.A.Pedersen, L.C.

(2022) Nat Commun 13: 3806-3806

  • DOI: https://doi.org/10.1038/s41467-022-31278-4
  • Primary Citation of Related Structures:  
    7M07, 7M09, 7M0A, 7M0B, 7M0D, 7M0E

  • PubMed Abstract: 

    DNA double-strand breaks (DSBs) threaten genomic stability, since their persistence can lead to loss of critical genetic information, chromosomal translocations or rearrangements, and cell death. DSBs can be repaired through the nonhomologous end-joining pathway (NHEJ), which processes and ligates DNA ends efficiently to prevent or minimize sequence loss. Polymerase λ (Polλ), one of the Family X polymerases, fills sequence gaps of DSB substrates with a strict specificity for a base-paired primer terminus. There is little information regarding Polλ's approach to engaging such substrates. We used in vitro polymerization and cell-based NHEJ assays to explore the contributions of conserved loop regions toward DSB substrate specificity and utilization. In addition, we present multiple crystal structures of Polλ in synapsis with varying biologically relevant DSB end configurations, revealing how key structural features and hydrogen bonding networks work in concert to stabilize these tenuous, potentially cytotoxic DNA lesions during NHEJ.


  • Organizational Affiliation

    Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, 111 TW Alexander Dr., Bldg. 101, Research Triangle Park, NC, 27709, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA polymerase lambda346Homo sapiensMutation(s): 0 
Gene Names: POLL
EC: 2.7.7.7 (PDB Primary Data), 4.2.99 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UGP5 (Homo sapiens)
Explore Q9UGP5 
Go to UniProtKB:  Q9UGP5
PHAROS:  Q9UGP5
GTEx:  ENSG00000166169 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UGP5
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
DNA (5'-D(*CP*GP*GP*CP*A)-3')B [auth T]5synthetic construct
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (5'-D(*CP*AP*GP*TP*GP*CP*T)-3')C [auth P]7synthetic construct
Sequence Annotations
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  • Reference Sequence

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Entity ID: 4
MoleculeChains LengthOrganismImage
DNA (5'-D(P*GP*CP*CP*G)-3')4synthetic construct
Sequence Annotations
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  • Reference Sequence

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Entity ID: 5
MoleculeChains LengthOrganismImage
DNA (5'-D(*GP*CP*AP*CP*TP*G)-3')E [auth U]6synthetic construct
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
TTP (Subject of Investigation/LOI)
Query on TTP

Download Ideal Coordinates CCD File 
F [auth A]THYMIDINE-5'-TRIPHOSPHATE
C10 H17 N2 O14 P3
NHVNXKFIZYSCEB-XLPZGREQSA-N
PPV
Query on PPV

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G [auth A]PYROPHOSPHATE
H4 O7 P2
XPPKVPWEQAFLFU-UHFFFAOYSA-N
GOL
Query on GOL

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Q [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
CA
Query on CA

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I [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL
Query on CL

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N [auth A],
O [auth A],
P [auth A]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG (Subject of Investigation/LOI)
Query on MG

Download Ideal Coordinates CCD File 
H [auth A],
J [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
NA
Query on NA

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K [auth A],
L [auth A],
M [auth A]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.83 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.768α = 90
b = 59.573β = 90
c = 140.726γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)United States1ZIA ES102645
National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS)United StatesZ01 ES065070

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-16
    Type: Initial release
  • Version 1.1: 2023-02-15
    Changes: Database references
  • Version 1.2: 2023-10-25
    Changes: Data collection, Refinement description