Purification and characterization of a DNA polymerase gamma from human trophoblast tissue by Scott W. Wong

Cover of: Purification and characterization of a DNA polymerase gamma from human trophoblast tissue | Scott W. Wong

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  • DNA polymerases.

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Statementby Scott W. Wong.
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Pagination[8], 66 leaves, bound :
Number of Pages66
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Open LibraryOL15074811M

Download Purification and characterization of a DNA polymerase gamma from human trophoblast tissue

DNA polymerase gamma has been purified ofold from human trophoblast tissue. Purification was achieved through successive chromatographies on phosphocellulose, DEAE-cellulose, DNA-cellulose, and high pressure gel exclusion through Fractogel TSK HWAuthor: Scott W.

Wong. PURIFICATION AND CHARACTERIZATION OF A DNA POLYMERASE GAMMA FROM HUMAN TROPHOBLAST TISSUE INTRODUCTION Eukaryotic cells contain at least three distinct classes of DNA polymerases which have been named sit, 4 and Y ().

The three classes can be differentiated from one another by their chromato. Grosse F, Krauss G. Purification of a 9S DNA polymerase alpha species from calf thymus. Biochemistry.

Sep 15; 20 (19)– Wong SW, Paborsky LR, Fisher PA, Wang TS, Korn D. Structural and enzymological characterization of immunoaffinity-purified DNA polymerase primase complex from KB by: 7.

Overproduction and purification of the p55 accessory subunit of pol γ. The full-length human p55 without its mitochondrial targeting sequence was originally cloned, expressed and purified from Escherichia coli as an N-terminal (His) 6-tagged protein in a pQE improve expression and quantity of protein, several rare codons in the cDNA were modified and the (His) 6-tag Cited by: Human mtDNA is replicated by DNA polymerase gamma (Pol ␥), minimally together with Twinkle helicase and single-stranded DNA-binding protein (SSB) (18).

Human Pol ␥ is a heterotrimer. The protein-coding region of DINB1, the human ortholog of DNA pol IV, was fused to glutathione S-transferase and expressed in insect cells. The purified fusion protein was shown to be a template-directed DNA polymerase that we propose to designate pol kappa.

DNA polymerases of rabbit mammary gland: Partial purification, characterization and changes in DNA polymerase activities as a function of physiological state.

International Journal of Biochemistry. Abstract. The human mitochondrial genome encodes a variety of genes required for oxidative phosphorylation, and loss of these essential gene functions induces a multitude of severe metabolic disorders (1, 2, 3, 4).Mitochondrial DNA (mtDNA) is replicated by the nuclear encoded DNA polymerase γ (), and pol γ is the only replicative eukaryotic DNA polymerase to display sensitivity to a wide.

INTRODUCTION. DNA polymerase activity is indispensable for genome replication and organism propagation across all biological domains ().Since its initial characterization (), the ability to harness DNA polymerase activity in vitro has become a fundamental tool in the field of molecular biology research ().Above and beyond its established importance in research, in vitro measurement of DNA.

DNA polymerase specifically involved in DNA repair. Plays an important role in translesion synthesis, where the normal high-fidelity DNA polymerases cannot proceed and DNA synthesis stalls.

Depending on the context, it inserts the correct base, but causes frequent base transitions, transversions and frameshifts.

Lacks 3'-5' proofreading exonuclease activity. THE JOURNAL OF BIOLOGICAL CHEMISTRY Vol. No. 5, Issue of March pp.Printed in U.S.A. Purification and Characterization of DNA Polymerase ’ IDENTIFICATION OF 7 AS A SUBUNIT OF THE DNA POLYMERASE I11 HOLOENZYME* (Received for. Purification and Characterization ofthe DNA-DependentRNA Polymerase from Clostridium acetobutylicum ANDREASPICHANDHUBERTBAHL* InstitutfurMikrobiologie, Georg-August-Universitat Gottingen, Grisebachstrasse 8, W Gottingen, FederalRepublic ofGermany Received 5 September /Accepted 27 December The DNA-dependent RNApolymerase (EC The four human DNA polymerase gene and protein families (A, B, X and Y) are colour coded, and were originally defined on the basis of conserved sequence motifs in their catalytic subunits.

DNA polymerase of P. falciparum mitochondria was characterized as a gamma-like DNA polymerase based on its sensitivity to the inhibitors aphidicolin, N-ethylmaleimide and 9-beta-D. Polymerase chain reaction (PCR) technique is widely used in many experimental conditions, and Taq DNA polymerase is critical in PCR process.

In this article, the Taq DNA polymerase expression plasmid is reconstructed and the protein product is obtained by rapid purification, (“Rapid purification of high-activity Taq DNA polymerase” (Pluthero, ), “Single-step purification of a. Human Embryonic Stem Cell Protocols.

Human Embryonic Stem Cell Protocols pp | Cite as. The Analysis of Mitochondria and Mitochondrial DNA in Human Embryonic Stem Cells.

Abstract. Previous studies have identified human breast tumor particles possessing many of the features characteristic of RNA tumor viruses. In addition to the expected size ( S) and density ( g/ml) these include possession of an outer membrane and an inner one surrounding a "core" containing a DNA polymerase and a large-molecular-weight (70S) RNA possessing detectable homology to the.

Reverse transcriptase activity of human acute leukaemic cells: purification of the enzyme, response to AMV 70S RNA, and characterization of the DNA product.

Nat New Biol. Nov 15; (98)– Schlabach A, Fridlender B, Bolden A, Weissbach A. DNA-dependent DNA polymerases from HeLa cell nuclei. Template and substrate utilization.

DNA polymerase has been purified abfold from the thermoacidophilic archaebacterium Sulfolobus acidocaldarjus. On SDS-PAGE the enzyme was observed to have a molecular weight of kDa and to be about 90% pure. The native molecular weight was kDa indicating that the enzyme is composed of a single polypeptide.

No DNA polymerase activity was detectable in the flow-through fraction of any of the three column chromatography steps, and the overall increase in specific activity resulting from these three purification steps was typically more than fold ().Attempts to further purify the cyanelle enzyme on single stranded DNA cellulose were unsuccessful, since no DNA polymerase activity could be.

Purification and Characterization of polk, a DNA Polymerase Encoded by the Human DINB1 Gene* Received for publication,and in revised form, October 4, Published, JBC Papers in Press, October 6,DOI /jbc.M Basic Isolation Procedure.

There are five basic steps of DNA extraction that are consistent across all the possible DNA purification chemistries: 1) disruption of the cellular structure to create a lysate, 2) separation of the soluble DNA from cell debris and other insoluble material, 3) binding the DNA of interest to a purification matrix, 4) washing proteins and other contaminants away from.

Hübscher U, Kuenzle CC, Spadari S. Identity of DNA polymerase gamma from synaptosomal mitochondria and rat-brain nuclei. Eur J Biochem. Dec 1; 81 (2)– Kalf GF, Maguire RF, Metrione RM, Koszalka TR.

DNA replication by isolated rat trophoblast nuclei. Characterization of the system and the product. The present study assessed high-level expression of the KOD DNA polymerase in Pichia pastoris.

Thermococcus kodakaraensis KOD1 is a DNA polymerase that is widely used in PCR. The DNA coding sequence of KOD was optimized based on the codon usage bias of P. pastoris and synthesized by overlapping PCR, and the nonspecific DNA-binding protein Sso7d from the.

DNA polymerase gamma, a mitochondrial replication enzyme of yeasts and animals, is not present in photosynthetic eukaryotes. Recently, DNA polymerases with distant homology to bacterial DNA. A thermophilic DNA polymerase has been purified to near homogeneity from the archaebacterium Thermoplasma is of the purified enzyme by sodium dodecyl sulfate gel electrophoresis revealed a single polypeptide of 88 kDa which co‐sediments with the DNA polymerase activity on sucrose gradients.

Regulation of expression. DNA polymerase beta maintains genome integrity by participating in base excision pression of POLB mRNA has been correlated with a number of cancer types, whereas deficiencies in POLB results in hypersensitivity to alkylating agents, induced apoptosis, and chromosomal ore, it is essential that POLB expression is tightly regulated.

For use in anti-DNA assays, DNA can be purified (through standard DNA purification protocols) from tissue (e.g., calf thymus), (eukaryotic) cells, bacteria, or bacteriophages.

In particular, the DNA from bacteriophage PM2 (which can easily be grown on its host, the bacterium Pseudomonas BAL31) has been shown to be very useful, since it can be.

DNA polymerases have various roles from DNA replication to tolerating DNA damage through a process known as translesion DNA synthesis. This Review discusses the function of the DNA polymerase. A DNA polymerase activity from mitochondria of the dicotyledonous angiosperm Chenopodium album L.

was purified almost fold by successive column chromatography steps on DEAE cellulose, heparin agarose and ssDNA cellulose.

The enzyme was characterized as a gamma-class polymerase, based on its resistance to inhibitors of the nuclear DNA polymerase alpha and its preference for poly(rA).(dT) Cardiac muscle of neonatal rats contains at least two molecular species of DNA polymerase: a S DNA polymerase that can be extracted from nuclei with m potassium phosphate and a 6 to 8 S.

Description The simplest DNA Polymerase known in both size and catalysis Replication enzyme involved in initiation of DNA replication in eukaryotes A multi-subunit complex, which inhibits DNA polymerase and primase Nucleic Acid Purification Kits.

DNA/RNA Purification Kits; Emulsion PCR (ePCR) Kits Human DNA Polymerase Gamma. Price From. Mitochondrial enzyme used for testing the toxicity of drugs on critical human oxidative functions and testing replication of mitochondrial DNA Unit Definition One unit is the amount of enzyme required to incorporate 1 pmole of total nucleotide into acid-insoluble form in 60 minutes at 37°C.

Isolation of DNA Polymerase. Purification of the DNA polymerase was a difficult and demanding task. The enzyme was present in relatively small amounts even in rapidly growing E.

coli (about molecules/cell). Fortunately, a fermentor for the large scale growth of E. coli that had been installed in the department supplied hundreds of grams of log phase E.

coli. For purification of up to µg total RNA from cells/tissues using gDNA Eliminator columns. The recombinant DNA polymerase containing a polyhistidine tag at the N-terminus was isolated in a single step by Ni2+ affinity chromatography. The purified recombinant enzyme, showing high polymerase activity contained 43 additional amino-acid residues (including a cluster of six histidine residues inserted for purification of the recombinant.

DNA polymerase gamma (Polγ) is a nuclear-encoded, mitochondrially active DNA replication and repair enzyme that is essential for the survival of. DNA polymerase is an enzyme that synthesizes DNA molecules from deoxyribonucleotides, the building blocks of enzymes are essential for DNA replication and usually work in pairs to create two identical DNA strands from a single original DNA molecule.

During this process, DNA polymerase "reads" the existing DNA strands to create two new strands that match the existing ones. The principal function of DNA polymerases is to copy DNA using one of its strands as a template and employing small fragments of DNA or RNA as primers for elongation from the 5' end to the 3'-OH end.

Purification of Taq DNA polymerase. Large scale preparations of the Taq DNA polymerase were done from liter batches of cells. Preparation cell lysates was performed by minor modifications of a previously described method (7).

LB media plus ampicillin was in- noculated with 1 ml of a saturated overnight culture. Reactions (25 μL) contained 1X PCR Master Mix (KAPA and Competitor Q) or 1X PCR Buffer, 3 mM MgCl2, mM of each dNTP and 1 U of hot-start Taq DNA Polymerase (home brew multiplex reagents, with Competitor I).

Human genomic DNA was used as template ( – 2 ng per reaction), and primers were supplied at μM each.Description. Simplest DNA polymerase known in both size and catalysis (1) Applications.

Repair polymerase able to synthesize DNA beyond the end of a gap or nick with simultaneous displacement of the non-replicated strand (2). Purification and functional characterization of human mitochondrial DNA polymerase gamma harboring disease mutations. Methods51 (4), DOI: /

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