PMID- 30670696
OWN - NLM
STAT- In-Process
LR  - 20190129
IS  - 2041-1723 (Electronic)
IS  - 2041-1723 (Linking)
VI  - 10
IP  - 1
DP  - 2019 Jan 22
TI  - Structural consequence of the most frequently recurring cancer-associated
      substitution in DNA polymerase epsilon.
PG  - 373
LID - 10.1038/s41467-018-08114-9 [doi]
AB  - The most frequently recurring cancer-associated DNA polymerase epsilon (Pol
      epsilon) mutation is a P286R substitution in the exonuclease domain. While
      originally proposed to increase genome instability by disrupting exonucleolytic
      proofreading, the P286R variant was later found to be significantly more
      pathogenic than Pol epsilon proofreading deficiency per se. The mechanisms
      underlying its stronger impact remained unclear. Here we report the crystal
      structure of the yeast orthologue, Pol epsilon-P301R, complexed with DNA and an
      incoming dNTP. Structural changes in the protein are confined to the exonuclease 
      domain, with R301 pointing towards the exonuclease site. Molecular dynamics
      simulations suggest that R301 interferes with DNA binding to the exonuclease
      site, an outcome not observed with the exonuclease-inactive Pol
      epsilon-D290A,E292A variant lacking the catalytic residues. These results reveal 
      a distinct mechanism of exonuclease inactivation by the P301R substitution and a 
      likely basis for its dramatically higher mutagenic and tumorigenic effects.
FAU - Parkash, Vimal
AU  - Parkash V
AUID- ORCID: 0000-0003-4365-6213
AD  - Department of Medical Biochemistry and Biophysics, Umea University, Umea,
      SE-90187, Sweden.
FAU - Kulkarni, Yashraj
AU  - Kulkarni Y
AUID- ORCID: 0000-0002-7643-9867
AD  - Department of Chemistry - BMC, Uppsala University, Box 576, Uppsala, S-751 23,
      Sweden.
FAU - Ter Beek, Josy
AU  - Ter Beek J
AUID- ORCID: 0000-0003-4165-9277
AD  - Department of Medical Biochemistry and Biophysics, Umea University, Umea,
      SE-90187, Sweden.
FAU - Shcherbakova, Polina V
AU  - Shcherbakova PV
AD  - Eppley Institute for Research in Cancer and Allied Diseases, Fred & Pamela
      Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, 68198,
      USA.
FAU - Kamerlin, Shina Caroline Lynn
AU  - Kamerlin SCL
AUID- ORCID: 0000-0002-3190-1173
AD  - Department of Chemistry - BMC, Uppsala University, Box 576, Uppsala, S-751 23,
      Sweden. lynn.kamerlin@kemi.uu.se.
FAU - Johansson, Erik
AU  - Johansson E
AUID- ORCID: 0000-0002-8526-6224
AD  - Department of Medical Biochemistry and Biophysics, Umea University, Umea,
      SE-90187, Sweden. erik.tm.johansson@umu.se.
LA  - eng
GR  - R01 ES015869/ES/NIEHS NIH HHS/United States
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, N.I.H., Extramural
DEP - 20190122
PL  - England
TA  - Nat Commun
JT  - Nature communications
JID - 101528555
PMC - PMC6342957
EDAT- 2019/01/24 06:00
MHDA- 2019/01/24 06:00
CRDT- 2019/01/24 06:00
PHST- 2018/04/19 00:00 [received]
PHST- 2018/12/12 00:00 [accepted]
PHST- 2019/01/24 06:00 [entrez]
PHST- 2019/01/24 06:00 [pubmed]
PHST- 2019/01/24 06:00 [medline]
AID - 10.1038/s41467-018-08114-9 [doi]
AID - 10.1038/s41467-018-08114-9 [pii]
PST - epublish
SO  - Nat Commun. 2019 Jan 22;10(1):373. doi: 10.1038/s41467-018-08114-9.