The Rho factor is a member of the hexameric helicase superfamily of enzymes - ring-shaped proteins made up of six independent subunits or "cylinders." Hexameric helicases are found in all organisms and are involved in unwinding and moving DNA and RNA strands around the cell. There are two subfamilies of hexameric helicase enzymes: AAA+ and RecA. Rho belongs to the RecA family, which is most common in bacteria. AAA+ motors are predominantly found in eukaryotes, including humans, as well as some human pathogens, such as the papillomavirus.
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Scientists have crystallised a protein that may help gut bacteria bind to the gastrointestinal tract. The protein could be used by probiotic producers to identify strains that are likely to be of real benefit to people.
SALT LAKE CITY—Researchers at Huntsman Cancer Institute, in collaboration with a worldwide group of physicians and scientists, have discovered a remarkable treatment for a rare, yet debilitating, skin condition.
The study, published online November 24 in Molecular Therapy describes a new treatment for pachyonychia congenita, an ultra-rare genetic skin condition caused by mutations in a gene called keratin. The disorder is characterized by painful, blistering calluses on the feet and limbs that limit a patient's ability to walk. Other skin and nail problems also occur.
Many people who are overweight or obese develop insulin resistance and type 2 diabetes at some stage in their lives. A European research team has now discovered that obese people have large amounts of the molecule CXCL5, produced by certain cells in fatty tissue.
Researchers at the University of Granada have found a suicide gene, called 'gene E', which leads to the death of tumour cells derived from breast, lung and colon cancer, and prevents their growth. The importance of this new gene is that its use to fight cancer can reduce the potent drugs that are currently used, so that could mean more effective treatment for cancer.
The presence of increased body fat, and therefore higher levels of inflammatory substances in the blood, hinders the loss and maintenance of body weight; as shown by a research project of the University of Navarra conducted by Estíbaliz Goyenechea Soto, a scientist at the School of Pharmacy.
What constitutes fish food is a matter of debate. A high-profile study a few years ago suggested that fish get almost 50 percent of their carbon from trees and leaves, evidence for a very close link between the terrestrial and aquatic ecosystems.
But new research from the University of Washington shows this is not likely to be true. Algae provide a much richer diet for fish and other aquatic life, according to research published this week in the Proceedings of the National Academy of Sciences.
WASHINGTON, D.C. November 18, 2009 -- A team of researchers at the University of California, San Diego and Stanford University has developed a way to simulate blood flow on the computer to optimize surgical designs. It is the basis of a new tool that may help surgeons plan for a life-saving operation called the "Fontan" surgery, which is performed on babies born with severe congenital heart defects.
Typically conducted in richer, developed countries but now increasingly done in the developing world, genome wide association (GWA) studies raise a host of ethical issues that must be addressed, argues a Policy Forum article published this week in PLoS Medicine. Among the most pressing ethical issues is the release of data, says Michael Parker of the University of Oxford and his colleagues, who highlight the importance of developing policies and procedures for data release appropriate to GWA studies in developing countries.
"Poverty in material terms is inextricably linked with poverty of [health] data" argues Peter Byass (Umeå Centre for Global Health Research, Sweden) this week in the Magazine section of open access journal, PLoS Medicine.
In this week's PLoS Medicine, the journal's editors call for concerted international action to address the crisis of malaria drug shortages across Africa.
Blacksburg, Va. – Cell fragments called platelets are essential to promote blood clotting. Virginia Tech faculty members and students have discovered novel molecular interactions at the surface of platelets that control blood clotting.
The smoking ban in Wales has not displaced secondhand smoke from public places into the home. A study of 3500 children from 75 primary schools in Wales, published in the open access journal BMC Public Health, found that they were exposed to similar amounts of secondhand smoke before and after legislation, which should reassure those worried that exposure to smoking at home could increase following the ban.
A menopause-cardiology consensus statement has called for direct action to prevent cardiovascular disease (CVD) in menopausal women. The statement also concludes that there is little evidence of increased CVD risk in taking HRT.
NEW YORK (Nov. 23, 2009) -- A first-of-its-kind consensus statement on diabetes surgery is published online today in the Annals of Surgery. The report illustrates the findings of the first international consensus conference -- Diabetes Surgery Summit (DSS) -- where an international group of more than 50 scientific and medical experts agreed on a set of evidence-based guidelines and definitions that are meant to guide the use and study of gastrointestinal surgery to treat type 2 diabetes.