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Microbiology News
Tue, 03 May 2016 13:13:59 EDT
Scientists reveal how cell corrects errors made in gene transcription
The dynamics of the RNA polymerase II (Pol II) backtracking process is poorly understood. Scientists have now built a Markov State Model from extensive molecular dynamics simulations to identify metastable intermediate states and the dynamics of backtracking at atomistic detail. The results reveal that Pol II backtracking occurs in a stepwise mode where two intermediate states are involved.
Tue, 03 May 2016 13:05:34 EDT
Algae use their 'tails' to gallop and trot like quadrupeds
Species of single-celled algae use whip-like appendages called flagella to coordinate their movements and achieve a remarkable diversity of swimming gaits.
Tue, 03 May 2016 10:44:37 EDT
Biophysics of bacterial cell division: Closing the ring
How bacterial cells divide in two is not fully understood. Physicists now show that, at high concentrations, a crucial protein can assemble into ring-shaped filaments that constrict the cell, giving rise to two daughter cells.
Tue, 03 May 2016 10:41:45 EDT
Bacteria use traffic-cop-like mechanism to infect gut
A study has found that a cellular syringe-like device used to invade intestinal cells also acts as a traffic cop -- directing bacteria where to go and thereby enabling them to efficiently carry out infection. This mechanism is critical to a pathogen's success.
Tue, 03 May 2016 09:17:52 EDT
Perfect imperfection: Researchers develop method for cross-species comparison of biological surfaces
One thing is obvious: moth's eyes and snake's skin are entirely different. Researchers have taken a closer look, however, and have now brought the supposed 'apples and oranges' to a common denominator. They have opened up a completely new, comparative view of biological surfaces using a newly developed method, and have thus come closer to the solution of how these surfaces work.
Mon, 02 May 2016 21:57:07 EDT
Antibiotics allow gut pathogens to 'breathe'
The chain of events that occur within the gut lumen after antibiotic treatment that allow 'bad' bugs to flourish is now better understood, thanks to new research.
Mon, 02 May 2016 16:11:08 EDT
Methane production reduced in ruminants
Livestock farming is responsible for 18 percent of the world's greenhouse gases, and ruminants such as cattle, sheep and goats generate 35 percent of one of these gases -- methane, and according to experts they make a significant contribution to climate change.
Mon, 02 May 2016 16:10:58 EDT
Earth may be home to one trillion species
Earth could contain nearly 1 trillion species, with only one-thousandth of 1 percent now identified, according to a study from biologists. The estimate is based on the intersection of large datasets and universal scaling laws.
Mon, 02 May 2016 13:15:07 EDT
Endangered venomous mammal predates dinosaurs' extinction, study confirms
Biologists have completely sequenced the mitochondrial genome for the Hispaniolan solenodon, filling in the last major branch of placental mammals on the tree of life. The study confirmed that the venomous mammal diverged from all other living mammals 78 million years ago, long before an asteroid wiped out the dinosaurs.
Mon, 02 May 2016 13:10:06 EDT
How DNA can take on the properties of sand or toothpaste
When does DNA behave like sand or toothpaste? When the genetic material is so densely packed within a virus, it can behave like grains of sand or toothpaste in a tube.That's essentially what biophysicists discovered when they began closely examining the physical properties of DNA jammed inside viruses.
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