6CTJ

Ternary complex crystal structure of DNA polymerase Beta with a dideoxy terminated primer with CHCH3, beta, gamma dTTP analogue


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mapping Functional Substrate-Enzyme Interactions in the pol beta Active Site through Chemical Biology: Structural Responses to Acidity Modification of Incoming dNTPs.

Batra, V.K.Oertell, K.Beard, W.A.Kashemirov, B.A.McKenna, C.E.Goodman, M.F.Wilson, S.H.

(2018) Biochemistry 57: 3934-3944

  • DOI: 10.1021/acs.biochem.8b00418
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • We report high-resolution crystal structures of DNA polymerase (pol) β in ternary complex with a panel of incoming dNTPs carrying acidity-modified 5'-triphosphate groups. These novel dNTP analogues have a variety of halomethylene substitutions replac ...

    We report high-resolution crystal structures of DNA polymerase (pol) β in ternary complex with a panel of incoming dNTPs carrying acidity-modified 5'-triphosphate groups. These novel dNTP analogues have a variety of halomethylene substitutions replacing the bridging oxygen between Pβ and Pγ of the incoming dNTP, whereas other analogues have alkaline substitutions at the bridging oxygen. Use of these analogues allows the first systematic comparison of effects of 5'-triphosphate acidity modification on active site structures and the rate constant of DNA synthesis. These ternary complex structures with incoming dATP, dTTP, and dCTP analogues reveal the enzyme's active site is not grossly altered by the acidity modifications of the triphosphate group, yet with analogues of all three incoming dNTP bases, subtle structural differences are apparent in interactions around the nascent base pair and at the guanidinium groups of active site arginine residues. These results are important for understanding how acidity modification of the incoming dNTP's 5'-triphosphate can influence DNA polymerase activity and the significance of interactions at arginines 183 and 149 in the active site.


    Organizational Affiliation

    Genome Integrity and Structural Biology Laboratory , National Institute of Environmental Health Sciences, National Institutes of Health , 111 T. W. Alexander Drive , Research Triangle Park , North Carolina 27709 , United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase beta
A
335Homo sapiensMutation(s): 0 
Gene Names: POLB
EC: 2.7.7.7, 4.2.99.-
Find proteins for P06746 (Homo sapiens)
Go to Gene View: POLB
Go to UniProtKB:  P06746
Entity ID: 1
MoleculeChainsLengthOrganism
DNA (5'-D(*CP*CP*GP*AP*CP*AP*GP*CP*GP*CP*AP*TP*CP*AP*GP*C)-3')T16Homo sapiens
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*GP*CP*TP*GP*AP*TP*GP*CP*GP*(DOC))-3')P10Homo sapiens
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(P*GP*TP*CP*GP*G)-3')D5Homo sapiens
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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Download CCD File 
A, P
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
FDV
Query on FDV

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A
5'-O-[(R)-hydroxy({(R)-hydroxy[(1S)-1-phosphonoethyl]phosphoryl}oxy)phosphoryl]thymidine
C12 H21 N2 O13 P3
UWVKVMOYWXUGRK-AXTSPUMRSA-N
 Ligand Interaction
MG
Query on MG

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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
DOC
Query on DOC
P
DNA LINKINGC9 H14 N3 O6 PDC
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.191 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 48.469α = 90.00
b = 76.947β = 103.88
c = 55.014γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXrefinement
HKL-2000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-06-20
    Type: Initial release
  • Version 1.1: 2018-07-11
    Type: Data collection, Database references