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Mitochondrial localization of Dictyostelium discoideum dUTPase mediated by its N-terminus

Journal Article · · BMC Research Notes
 [1];  [2];  [3];  [4];  [3]
  1. Univ. of Nebraska, Lincoln, NE (United States). School of Biological Sciences; DOE/OSTI
  2. Univ. of Alabama, Huntsville, AL (United States). Dept. of Biological Sciences; iXpressGenes Inc, Hudson Alpha Inst. for Biotechnology, Huntsville, AL (United States)
  3. Univ. of Nebraska, Lincoln, NE (United States). School of Biological Sciences
  4. Dartmouth College, Hanover, NH (United States). Geisel School of Medicine. Dept. of Molecular and System Biology

Objective: The nuclear and mitochondrial genomes of Dictyostelium discoideum, a unicellular eukaryote, have relatively high A+T-contents of 77.5% and 72.65%, respectively. To begin to investigate how the pyrimidine biosynthetic pathway fulflls the demand for dTTP, we determined the catalytic properties and structure of the key enzyme deoxyuridine triphosphate nucleotidohydrolase (dUTPase) that hydrolyzes dUTP to dUMP, the precursor of dTTP. Results: The annotated genome of D. discoideum identifes a gene encoding a polypeptide containing the fve conserved motifs of homotrimeric dUTPases. Recombinant proteins, comprised of either full-length or core polypeptides with all conserved motifs but lacking residues 1-37 of the N-terminus, were active dUTPases. Crystallographic analyses of the core enzyme indicated that the C-termini, normally flexible, were constrained by interactions with the shortened N-termini that arose from the loss of residues 1-37. This allowed greater access of dUTP to active sites, resulting in enhanced catalytic parameters. A tagged protein comprised of the N-terminal forty amino acids of dUTPase fused to green fluorescent protein (GFP) was expressed in D. discoideum cells. Supporting a prediction of mitochondrial targeting information within the N-terminus, localization and subcellular fractionation studies showed GFP to be in mitochondria. N-terminal sequencing of immunoprecipitated GFP revealed the loss of the dUTPase sequence upon import into the organelle.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1629663
Alternate ID(s):
OSTI ID: 1833655
Journal Information:
BMC Research Notes, Journal Name: BMC Research Notes Journal Issue: 1 Vol. 13; ISSN 1756-0500
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English

References (39)

One Stop Shop for Everything Dictyostelium: dictyBase and the Dicty Stock Center in 2012 book January 2013
Processing of mitochondrial presequences journal September 2012
Purification, functional characterization, and cDNA sequencing of mitochondrial porin from Dictyostelium discoideum. journal October 1992
Human dUTP pyrophosphatase: uracil recognition by a β hairpin and active sites formed by three separate subunits journal September 1996
Global analysis of protein expression in yeast journal October 2003
Structure of ATP citrate lyase and the origin of citrate synthase in the Krebs cycle journal April 2019
Full-length transcriptome analysis of multiple organs and identification of adaptive genes and pathways in Mikania micrantha journal February 2022
Characterization of Distinct Nuclear and Mitochondrial Forms of Human Deoxyuridine Triphosphate Nucleotidohydrolase journal March 1996
Identification of a Consensus Cyclin-dependent Kinase Phosphorylation Site Unique to the Nuclear Form of Human Deoxyuridine Triphosphate Nucleotidohydrolase journal March 1996
Kinetic Characterization of dUTPase from Escherichia coli journal September 1996
Developmental Regulation of dUTPase in Drosophila melanogaster journal May 2004
The prediction of organelle-targeting peptides in eukaryotic proteins with Grammatical-Restrained Hidden Conditional Random Fields journal February 2013
Protein sequence comparisons show that the ‘pseudoproteases’ encoded by poxviruses and certain retroviruses belong to the deoxyuridine triphosphatase family journal January 1990
Dictyostelium acetoacetyl-CoA thiolase is a dual-localizing enzyme that localizes to peroxisomes, mitochondria and the cytosol journal July 2015
Fumarase: a paradigm of dual targeting and dual localized functions: Fumarase: dual targeting and dual localized functions journal October 2011
Structural insights into the mechanism defining substrate affinity in Arabidopsis thaliana dUTPase: the role of tryptophan 93 in ligand orientation journal December 2015
Tissue-specific G1-phase cell-cycle arrest prior to terminal differentiation in Dictyostelium journal June 2004
Live imaging of the Dictyostelium cell cycle reveals widespread S phase during development, a G2 bias in spore differentiation and a premitotic checkpoint journal March 2008
Phosphorylated peptide of G protein-coupled receptor induces dimerization in activated arrestin text January 2020
Homotrimeric dUTPases; Structural Solutions for Specific Recognition and Hydrolysis of dUTP journal December 2001
Flexible glycine rich motif ofEscherichia coli deoxyuridine triphosphate nucleotidohydrolase is important for functional but not for structural integrity of the enzyme journal August 1997
Dictionary of protein secondary structure: Pattern recognition of hydrogen-bonded and geometrical features journal December 1983
Purification, functional characterization, and cDNA sequencing of mitochondrial porin from Dictyostelium discoideum. journal October 1992
Transmembrane domains in the functions of Fc receptors journal December 2002
Human dUTP pyrophosphatase: uracil recognition by a β hairpin and active sites formed by three separate subunits journal September 1996
Keeping Uracil Out of DNA: Physiological Role, Structure and Catalytic Mechanism of dUTPases journal January 2009
Global analysis of protein localization in budding yeast journal October 2003
The genome of the social amoeba Dictyostelium discoideum journal May 2005
BaCelLo: a Balanced subCellular Localization predictor. journal March 2007
Systematic discovery of pseudomonad genetic factors involved in sensitivity to tailocins journal March 2021
Mitochondrial DNA replication but no nuclear DNA replication during development of Dictyostelium. journal June 1995
The Human dUTPase Gene Encodes both Nuclear and Mitochondrial Isoforms journal July 1997
Developmental Regulation of dUTPase in Drosophila melanogaster journal May 2004
MitoFates: Improved Prediction of Mitochondrial Targeting Sequences and Their Cleavage Sites journal February 2015
BaCelLo: a balanced subcellular localization predictor journal July 2006
MAFFT Multiple Sequence Alignment Software Version 7: Improvements in Performance and Usability journal January 2013
Gapped BLAST and PSI-BLAST: a new generation of protein database search programs journal September 1997
A series of PDB-related databanks for everyday needs journal October 2014
Computational Method to Predict Mitochondrially Imported Proteins and their Targeting Sequences journal November 1996


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