Tag: "nucleus" at biology news
Regulating the nuclear architecture of the cell
... called the nucleolus resides deep within the cell nucleus
and performs one of the cell's most critical funct...ncer. The organization of structures in the cell's nucleus
has profound effects on such essential functions as how and when genes are expressed. When regulatio...
Dartmouth researchers find that low doses of arsenic have broad impact on hormone activity
...y of the hormone-activated receptor to move to the nucleus
of the cell or to bind to DNA to initiate gene expression. Yet, somehow arsenic still strongly affects the ability of these hormone-activated receptors to regulate gene expression. There's still a lot more to learn." The study also looked into the ...
University of Alberta researchers discover hummingbird secret
...s smaller than a fingertip. "We reasoned that this nucleus
helps the hummingbird stay stationary in space, ev...ummingbirds track visual motion while watching the nucleus
to see how it reacts....
Protein shown to rally biological clock
...ological clock, an area called the suprachiasmatic nucleus
(SCN), located at the base of the brain right across the optic nerve, keep 24-hour time and are normally highly synchronized. The SCN is composed of 10,000 neurons on one side of the hypothalamus, and 10,000 on the other. Together these neurons ar...
Yale Cell Biologist Joel Rosenbaum, to receive Prestigious Wilson Award
...re missing or ineffective, a signal is sent to the nucleus
and the tubule cells divideand continue to divide. PKD is, therefore, a cancer of the kidney, where cells that should not be dividing start to divide because of a defect in a signaling pathway starting at the cilium This sensory role of primary non...
Finding a cure for cancer: The holy grail of science
...arch carried out in the field of genetics and cell nucleus
architecture. A greater understanding of the body's building blocks might ultimately lead to a better understanding of human disease. Understanding DNA damage Jiri Bartek from the Danish Cancer Society in Copenhagen in Denmark, is one step closer...
Neanderthal genome sequencing yields surprising results and opens a new door to future studies
...NA (mtDNA), genetic material that lies outside the nucleus
of the cell. Although mtDNA tends to remain preserved longer than nuclear DNA, it provides limited biological information. The vast majority of the genome is comprised of nuclear DNA, which contains almost all of the genes. "Nuclear DNA is where ...
Nanoscale microscope sheds first light on gene repair
...hysical structures in various processes within the nucleus
can now be visualized. "The general application... been known how H2AX is distributed throughout the nucleus
or why its conversion to gamma-H2AX is limited to within a short distance of a break site. By using ...
Drug that interrupts a key stage of cell division shows promise for advanced solid tumors
...ulate the different steps in mitosis when the cell nucleus
divides into two identical cells. The enzymes help the dividing cell to share its genetic material between the daughter cells, and they are essential for cell proliferation. Aurora proteins are over-expressed in cancer and this causes unequal distr...
Stem cells engage in dialogue with the cells that regulate their futures
...ns are freed inside the cell to travel to the cell nucleus
and turn on various genes. According to Ruohula-Baker, the Notch pathway plays an important role in many stem-cell niches, including those in the blood system, gut, breasts, and muscles. However, in many cases it hasn't been clear which cells send ...
HHMI awards $19 million to Latin American, Canadian scientists
...lian researcher who is studying how calcium in the nucleus
of cells regulates cell growth. She hopes to determine whether growth factors stimulate cell growth specifically by activating calcium signaling pathways in the cell's nucleus. Her work could provide important insights for the regeneration of liver c...
High-tech research shows cocaine changes proteins and brain function
...e investigators analyzed protein expression in the nucleus
accumbens, a part of the brain involved in the addictive effects of drugs, in 10 cocaine-overdose victims and 10 drug-free individuals. Analysis of thousands of proteins revealed differences between the two groups in the amounts of approximately 50 ...
Scientists prove that parts of cell nuclei are not arranged at random
of a mammal cell is made up of component parts arr... this discovery that parts of the inside of a cell nucleus
are not arranged at random will give greater insight into how cells work and could eventually lead t...
Earliest fungi may have found multiple solutions to propagation on land, new study infers
...ving complex cellular architectures that include a nucleus
-- fungi are the only ones that can digest food outside their bodies, he said. "They release enzymes to do that and then absorb the nutrients," he said. "That's why they are the primary decomposers in land-based ecosystems, and many are also decomp...
Vax and Pax: Taking turns to build an eye
... Both proteins bind DNA and function in a cell's nucleus
to switch genes on and off. Pax6 regulates the dev...erve gets built. Finding both proteins in the same nucleus
would make about as much sense as having runners for the Giants and the Dodgers on base at the same ...
Molecular 'signature' protects cells from viruses
...DNA-like substance, the RNA. Via pores in the cell nucleus
it reaches the cell plasma. The individual parts o...r: they show that the instructions from the cell's nucleus
carry a kind of 'signature', which is missing in the virus commands. RNA is like a long string. In v...
Hopkins researchers uncover critical player in cell communication
...iment and the abundance of TFII-I outside the cell nucleus
led us to suspect that this protein must be doing more than regulate gene expression," says Desiderio. Under normal conditions, calcium does not flow freely into and out of cells until a demand for it - such as a muscle contraction or nerve functio...
Researchers discover misfolded protein clumps common to dementia, Lou Gehrig's disease
...scribing and regulating genetic information in the nucleus
of the cell. "There is much more to learn about how this nuclear protein is clumped in the cytoplasm of cells and about the mechanism by which it is implicated in two distinctly different diseases," says Stephen Snyder, Ph.D., program director, etio...
Columbia University awards 2006 Horwitz Prize to biologist who explained gene transcription
...NA. The messenger RNA is later shipped outside the nucleus
where the next steps occur. Much of Dr. Kornberg's work over the last 30 years has revealed the identity of many of the molecules in the RNA polymerase II complex and many others that interact with the complex. In a technical tour de force he also d...
News tips from the Journal of Neuroscience
...y of histaminergic neurons in the tuberomammillary nucleus
(TMN) of mice during sleep and wake cycles. These ...entral chemoreceptor neurons in the retrotrapezoid nucleus
and a connected chain of neurons that relay information from peripheral chemoreceptors to the centra...
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