6P1T

Pre-catalytic ternary complex of human DNA Polymerase Mu with 1-nt gapped substrate containing template 8OG and bound CMPCPP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Unexpected behavior of DNA polymerase Mu opposite template 8-oxo-7,8-dihydro-2'-guanosine.

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

(2019) Nucleic Acids Res 47: 9410-9422

  • DOI: 10.1093/nar/gkz680
  • Primary Citation of Related Structures:  
    6P1M, 6P1N, 6P1O, 6P1P, 6P1Q, 6P1R, 6P1S, 6P1T, 6P1U, 6P1V, 6P1W

  • PubMed Abstract: 
  • DNA double-strand breaks (DSBs) resulting from reactive oxygen species generated by exposure to UV and ionizing radiation are characterized by clusters of lesions near break sites. Such complex DSBs are repaired slowly, and their persistence can have severe consequences for human health ...

    DNA double-strand breaks (DSBs) resulting from reactive oxygen species generated by exposure to UV and ionizing radiation are characterized by clusters of lesions near break sites. Such complex DSBs are repaired slowly, and their persistence can have severe consequences for human health. We have therefore probed DNA break repair containing a template 8-oxo-7,8-dihydro-2'-guanosine (8OG) by Family X Polymerase μ (Pol μ) in steady-state kinetics and cell-based assays. Pol μ tolerates 8OG-containing template DNA substrates, and the filled products can be subsequently ligated by DNA Ligase IV during Nonhomologous end-joining. Furthermore, Pol μ exhibits a strong preference for mutagenic bypass of 8OG by insertion of adenine. Crystal structures reveal that the template 8OG is accommodated in the Pol μ active site with none of the DNA substrate distortions observed for Family X siblings Pols β or λ. Kinetic characterization of template 8OG bypass indicates that Pol μ inserts adenosine nucleotides with weak sugar selectivity and, given the high cellular concentration of ATP, likely performs its role in repair of complex 8OG-containing DSBs using ribonucleotides.


    Organizational Affiliation

    Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC 27709, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA-directed DNA/RNA polymerase muA354Homo sapiensMutation(s): 0 
Gene Names: POLMpolmu
EC: 2.7.7.7
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NP87 (Homo sapiens)
Explore Q9NP87 
Go to UniProtKB:  Q9NP87
PHAROS:  Q9NP87
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NP87
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
DNA (5'-D(*CP*GP*GP*CP*(8OG)P*TP*AP*CP*G)-3')B [auth T]9Homo sapiens
Protein Feature View
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
DNA (5'-D(*CP*GP*TP*A)-3')C [auth P]4Homo sapiens
Protein Feature View
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  • Reference Sequence

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Entity ID: 4
MoleculeChainsLengthOrganismImage
DNA (5'-D(P*GP*CP*CP*G)-3')D4Homo sapiens
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2TM (Subject of Investigation/LOI)
Query on 2TM

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E [auth A]5'-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]methyl}phosphoryl]cytidine
C10 H18 N3 O13 P3
STGUOVSTMBLHFT-ZOQUXTDFSA-N
 Ligand Interaction
EPE
Query on EPE

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L [auth A]4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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M [auth A],
N [auth A]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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I [auth A],
J [auth A],
K [auth A]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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F [auth A],
G [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

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H [auth A],
O [auth T]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.805α = 90
b = 68.715β = 90
c = 110.434γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data reduction
HKL-3000data 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 ES 102645

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-04
    Type: Initial release
  • Version 1.1: 2019-10-09
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-18
    Changes: Author supporting evidence