DNA polymerase β: analysis of the contributions of tyrosine-271 and asparagine-279 to substrate specificity and fidelity of DNA replication by pre-steady-state kinetics

VS KRAYNOV, BG WERNEBURG, X ZHONG… - Biochemical …, 1997 - portlandpress.com
DNA polymerase β (pol β) from rat brain, overexpressed in Escherichia coli, was used as a
model to study the factors responsible for substrate specificity [k pol, K d (app) and k pol/K d …

DNA polymerase β: pre-steady-state kinetic analysis and roles of arginine-283 in catalysis and fidelity

BG Werneburg, J Ahn, X Zhong, RJ Hondal… - Biochemistry, 1996 - ACS Publications
DNA polymerase β (pol β) is the smallest and least complex DNA polymerase. The structure
of the enzyme is well understood, but little is known about its catalytic properties, particularly …

[HTML][HTML] DNA structure and aspartate 276 influence nucleotide binding to human DNA polymerase β: implication for the identity of the rate-limiting conformational …

BJV Berg, WA Beard, SH Wilson - Journal of Biological Chemistry, 2001 - ASBMB
Structures of DNA polymerase (pol) β bound to single-nucleotide gapped DNA had revealed
that the lyase and pol domains form a" doughnut-shaped" structure altering the dNTP …

DNA polymerase β: effects of gapped DNA substrates on dNTP specificity, fidelity, processivity and conformational changes

J AHN, VS KRAYNOV, X ZHONG… - Biochemical …, 1998 - portlandpress.com
Pre-steady-state kinetic analysis was used to compare the catalytic properties of DNA
polymerase β (Pol β) for single-base gap-filling and regular duplex DNA synthesis. The rate …

[HTML][HTML] Kinetic analysis of nucleotide incorporation by mammalian DNA polymerase δ

HJ Einolf, FP Guengerich - Journal of Biological Chemistry, 2000 - ASBMB
The kinetics of nucleotide incorporation into 24/36-mer primer/template DNA by purified fetal
calf thymus DNA polymerase (pol) δ was examined using steady-state and pre-steady-state …

DNA polymerase β: Contributions of template-positioning and dNTP triphosphate-binding residues to catalysis and fidelity

VS Kraynov, AK Showalter, J Liu, X Zhong… - Biochemistry, 2000 - ACS Publications
The specific catalytic roles of two groups of DNA polymerase β active site residues identified
from crystal structures were investigated: residues possibly involved in DNA template …

DNA polymerase β: structure− fidelity relationship from pre-steady-state kinetic analyses of all possible correct and incorrect base pairs for wild type and R283A …

J Ahn, BG Werneburg, MD Tsai - Biochemistry, 1997 - ACS Publications
The kinetic parameters (k pol,) for all possible correct and incorrect pairing between the A, T,
G, and C bases were determined for wild-type (WT) rat DNA polymerase β (pol β) and the …

Insight into the Catalytic Mechanism of DNA Polymerase β:  Structures of Intermediate Complexes,

JW Arndt, W Gong, X Zhong, AK Showalter, J Liu… - Biochemistry, 2001 - ACS Publications
The catalytic reaction mediated by DNA polymerases is known to require two Mg (II) ions,
one associated with dNTP binding and the other involved in metal ion catalysis of the …

Enzymatic properties of rat DNA polymerase β mutants obtained by randomized mutagenesis

A Skandalis, LA Loeb - Nucleic acids research, 2001 - academic.oup.com
We have used random sequence mutagenesis to generate mutants of DNA polymerase β in
an effort to identify amino acid residues important for function, catalytic efficiency and fidelity …

DNA polymerase β: pre-steady-state kinetic analyses of dATPαS stereoselectivity and alteration of the stereoselectivity by various metal ions and by site-directed …

J Liu, MD Tsai - Biochemistry, 2001 - ACS Publications
The first pre-steady-state kinetic analysis of the stereoselectivity of a DNA polymerase, Pol β
from rat brain, toward Rp and Sp isomers of dATPαS, and alteration of the stereoselectivity …