Cited by 75DNA Repair MechanismsEnzyme Structure and FunctionDNA and Nucleic Acid Chemistry

Structural characterization of human 8-oxoguanine DNA glycosylase variants bearing active site mutations

Open access
Radom, Christopher T., Banerjee, Anirban, Verdine, Gregory L.·2007·Journal of Biological Chemistry

Abstract

The human 8-oxoguanine DNA glycosylase (hOGG1) protein is responsible for initiating base excision DNA repair of the endogenous mutagen 8-oxoguanine. Like nearly all DNA glycosylases, hOGG1 extrudes its substrate from the DNA helix and inserts it into an extrahelical enzyme active site pocket lined with residues that participate in lesion recognition and catalysis. Structural analysis has been performed on mutant versions of hOGG1 having changes in catalytic residues but not on variants having altered 7,8-dihydro-8-oxoguanine (oxoG) contact residues. Here we report high resolution structural analysis of such recognition variants. We found that Ala substitution at residues that contact the phosphate 5' to the lesion (H270A mutation) and its Watson-Crick face (Q315A mutation) simply removed key functionality from the contact interface but otherwise had no effect on structure. Ala substitution at the only residue making an oxoG-specific contact (G42A mutation) introduced torsional stress into the DNA contact surface of hOGG1, but this was overcome by local interactions within the folded protein, indicating that this oxoG recognition motif is "hardwired." Introduction of a side chain intended to sterically obstruct the active site pocket (Q315F mutation) led to two different structures, one of which (Q315F(*149)) has the oxoG lesion in an exosite flanking the active site and the other of which (Q315F(*292)) has the oxoG inserted nearly completely into the lesion recognition pocket. The latter structure offers a view of the latest stage in the base extrusion pathway yet observed, and its lack of catalytic activity demonstrates that the transition state for displacement of the lesion base is geometrically demanding.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1074/jbc.m608989200

Cites

43 of 43 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 2

  1. Rosenquist, T. A., Zharkov, D. O., and Grollman, A. P. (1997) Proc. Natl. Acad. Sci. U. S. A. 94, 7429 -7434
  2. Banerjee, A., and Verdine, G. L. (2006) Proc. Natl. Acad. Sci. U. S. A. 103, 15020 -15025

Cited by

Sorted by citations

Authors
Radom, C. T., Banerjee, A., & Verdine, G. L.
Affiliations
Harvard University (US)
Corresponding author
Verdine, Gregory L.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2007-03
Volume
282
Issue
12
Pages
9182-9194
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2103089225
Cited by
75
References
43
Citations by year
2026: 5 · 2025: 1 · 2024: 4 · 2023: 1 · 2022: 3 · 2021: 1 · 2020: 6 · 2019: 4 · 2018: 2 · 2017: 6 · 2016: 2 · 2015: 2 · 2014: 6 · 2013: 4 · 2012: 6
FWCI
2.17
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Energy (31-109-ENG-38, DEAC-02-98CH10886, -AC02-98 CH 10886, DE-AC02-)
  • National Institutes of Health (DE-AC02-98CH10886, W-31-109-ENG-38)
  • Office of Science (DE-AC-02-98CH10886, DE-AC02, 31-109-ENG-38)
  • National Cancer Institute (CA 100742, R01CA100742)
  • Basic Energy Sciences (DE-AC02, DEAC0298CH10886, AC02-98CH10886)
  • Biological and Environmental Research (W-31-109-ENG, DE-AC02-98CH10886, W-31-109-ENG-38)
  • Argonne National Laboratory (DE-AC02)
  • Brookhaven National Laboratory (AC-02-98CH10886, DE-AC02- 98CH10886)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
OGG1, DNA base excision repair, 8-oxoguanine, lesion recognition, active site pocket, catalytic residues, torsional stress, exosite
MeSH terms
Alanine, Binding Sites, Catalysis, Cloning, Molecular, Cross-Linking Reagents, Humans, Models, Chemical, Models, Molecular, Molecular Conformation, Mutation, Protein Conformation, Protein Structure, Tertiary, Crystallography, X-Ray, Amino Acid Motifs, DNA Glycosylases

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review