DNA Replication News and Research

RSS

DNA replication, the basis for biological inheritance, is a fundamental process occurring in all living organisms to copy their DNA. This process is "semiconservative" in that each strand of the original double-stranded DNA molecule serves as template for the reproduction of the complementary strand. Hence, following DNA replication, two identical DNA molecules have been produced from a single double-stranded DNA molecule. Cellular proofreading and error-checking mechanisms ensure near perfect fidelity for DNA replication.

Unstable leukemia stem cells may predispose patients to drug resistance

The BCR-ABL gene in chronic myeloid leukemia stem cells has a tendency to quickly mutate, and this may help explain why patients are predisposed to resistance to drugs like imatinib that target that gene, according to a study in the May 2 Journal of the National Cancer Institute.

2 May 2007

Unusual protein helps cell bypass damage when making new DNA

Scientists have discovered how an unusual protein helps a cell bypass damage when making new DNA, thereby averting the cell's self-destruction.

3 Apr 2007

Novel pathway for antibiotic-induced cell death

Scientists have identified unforeseen mechanisms by which quinolones - a family of broad-spectrum antibiotics among the most widely prescribed - induce bacterial cell death.

13 Mar 2007

Scientists step closer to understanding the relationship between aging and cancer

Wielding a palette of chromosome paints, scientists at the Salk Institute for Biological Studies have taken a step closer to understanding the relationship between aging and cancer by visualizing chromosomes of cells from patients with a heritable premature aging disease known as Werner Syndrome.

6 Feb 2007

Researchers identifiy how immune system contributes to nerve fiber damage caused by multiple sclerosis

Researchers have identified how the body's own immune system contributes to the nerve fiber damage caused by multiple sclerosis, a finding that can potentially aid earlier diagnosis and improved treatment for this chronic disease.

16 Oct 2006

Morphotek granted two European technology patents

Morphotek has announced that the European Patent Office has given a "Decision of Grant" regarding the Company's US Patent 6,921,666 entitled "Methods for Generating Hypermutable Yeast" and US Patent 6,737,268 entitled "A Method for Generating Genetically Altered Antigens."

30 Aug 2006

New novel protein-genome interaction mapping technology

Fred Hutchinson Cancer Research Center, The Netherlands Cancer Institute (NKI) and Cancer Research Technology Limited (CRT) today have released details of the development and commercialisation of a powerful protein-genome interaction mapping technology termed 'DamID.'

14 Aug 2006

DNA overwinds when stretched

Most of us are familiar with the winding staircase image of DNA, the repository of a biological cell's genetic information. But few of us realize just how tightly that famous double helix is wound.

8 Aug 2006

Gene family expansion can begin even before a gene is duplicated

Theoretical biologist Stephen Proulx studies gene families to explore how genomes become diverse and evolve.

6 Aug 2006

Researchers determine structure of an important smallpox virus enzyme and how it binds to DNA

Researchers at the University of Pennsylvania School of Medicine have determined the structure of an important smallpox virus enzyme and how it binds to DNA.

4 Aug 2006

Genetic mutations may be responsible for schizophrenia

The higher risk of schizophrenia among offspring of expectant mothers living through famine could help us understand the genetic basis for that debilitating mental disorder.

2 Aug 2006

Potential new diagnostic test and treatment for lung cancer

University of York spinout company, Cizzle Biotechnology, has secured venture capital funding from the White Rose Technology Seedcorn Fund to continue its development of a potential new diagnostic test and treatment for lung cancer.

17 Jul 2006

Environmentally damaged DNA may contribute to human genetic diversity

In this month's issue of the leading scientific journal Genome Research, scientists from Kyushu University report how environmentally damaged DNA may contribute to human genetic diversity.

2 May 2006

WRN exonuclease structure and molecular mechanism imply an editing role in DNA end processing

A team of scientists from Lawrence Berkeley National Laboratory and the Scripps Research Institute has determined the crystal structure and molecular mechanisms of a key part of WRN, a protein that protects humans from premature aging and cancer.

23 Apr 2006

A genomic signature of 254 genes predicting clinical outcome in Primary Cutaneous Melanoma identified

EORTC Melanoma Group researchers have identified a genomic signature predicting clinical outcome in Primary Cutaneous Melanoma, after patients having undergone standard treatment.

6 Apr 2006

Discovery in yeast opens door to new source of information on DNA damage, repair, and cancer

The discovery in yeast cells of a genetic network that guards against lethal DNA damage is a first step in the creation of a database of disease-causing combinations of mutated human genes, according to researchers at The Johns Hopkins University School of Medicine led by Jef. D. Boeke, Ph.D.

15 Mar 2006

Morphotek issued patent covering the use of chemical inhibitors of mismatch repair

Morphotek Inc. announced today the issuance of United States Patent 6,982,169 covering the use of chemical inhibitors to enhance evolution of target host cell genomes by reversibly regulating mismatch repair (MMR) in vivo.

23 Jan 2006

DinB DNA polymerase is a key player in DNA repair

A quarter century after they discovered it, researchers have identified the job of one of the most common DNA-damage response proteins. The enzyme has puzzled scientists because it is present in nearly every organism, which suggests that it is crucial to life, and yet, in laboratory experiments, its function has remained a mystery.

11 Jan 2006

Importance of telomeres in preserving genome integrity and preventing cancer development

Researchers at the Salk Institute for Biological Studies discovered that cells co-opted the machinery that usually repairs broken strands of DNA to protect the integrity of chromosomes.

7 Dec 2005

Artificial mammalian origin of replication

A collaboration of researchers from Harvard Medical School and the University of Virginia, led by Dr. Anindya Dutta, has created an artificial mammalian origin of replication that will facilitate the future study of mammalian DNA replication.

2 Dec 2005