3PZP

Human DNA polymerase kappa extending opposite a cis-syn thymine dimer

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.34 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 

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Literature

Role of human DNA polymerase kappa in extension opposite from a cis-syn thymine dimer.

Vasquez-Del Carpio, R., Silverstein, T.D., Lone, S., Johnson, R.E., Prakash, L., Prakash, S., Aggarwal, A.K.

(2011) J Mol Biol 408: 252-261

  • DOI: 10.1016/j.jmb.2011.02.042
  • Primary Citation of Related Structures:  
    3PZP

  • PubMed Abstract: 

    • Exposure of DNA to UV radiation causes covalent linkages between adjacent pyrimidines. The most common lesion found in DNA from these UV-induced linkages is the cis-syn cyclobutane pyrimidine dimer. Human DNA polymerase κ (Polκ), a member of the Y-family of DNA polymerases, is unable to insert nucleotides opposite the 3'T of a cis-syn T-T dimer, but it can efficiently extend from a nucleotide inserted opposite the 3'T of the dimer by another DNA polymerase ...

    Exposure of DNA to UV radiation causes covalent linkages between adjacent pyrimidines. The most common lesion found in DNA from these UV-induced linkages is the cis-syn cyclobutane pyrimidine dimer. Human DNA polymerase κ (Polκ), a member of the Y-family of DNA polymerases, is unable to insert nucleotides opposite the 3'T of a cis-syn T-T dimer, but it can efficiently extend from a nucleotide inserted opposite the 3'T of the dimer by another DNA polymerase. We present here the structure of human Polκ in the act of inserting a nucleotide opposite the 5'T of the cis-syn T-T dimer. The structure reveals a constrained active-site cleft that is unable to accommodate the 3'T of a cis-syn T-T dimer but is remarkably well adapted to accommodate the 5'T via Watson-Crick base pairing, in accord with a proposed role for Polκ in the extension reaction opposite from cyclobutane pyrimidine dimers in vivo.

    Organizational Affiliation: 

    Department of Structural and Chemical Biology, Mount Sinai School of Medicine, Box 1677, 1425 Madison Avenue, New York, NY 10029, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase kappaA, B517Homo sapiensMutation(s): 0 
Gene Names: POLK, DINB1
EC: 2.7.7.7
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UBT6 (Homo sapiens)
Explore Q9UBT6 
Go to UniProtKB:  Q9UBT6
PHAROS:  Q9UBT6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UBT6
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
5'-D(*GP*GP*GP*GP*GP*AP*AP*GP*GP*AP*CP*CP*A)-3'C [auth P],
E [auth Q]		13N/A
Protein Feature View
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
5'-D(*TP*TP*CP*CP*(TTD)P*GP*GP*TP*CP*CP*TP*TP*CP*CP*CP*CP*C)-3'D [auth T],
F [auth U]		17N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.34 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.244 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.136α = 90
b = 154.476β = 90
c = 217.854γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-12-28
    Type: Initial release