Tag: "photoreceptor" at biology news
Scientists Discover How Genes Work Together To Control Neural Development
...figure out which genes regulate the development of photoreceptor
neurons,which convert light signals into chemical ...enes to become eitherlight-filtering cone cells or photoreceptor
neurons. "That's whenwe dissect the eyes to look at them under the microscope," Lai says. External ...
Blindness Linked To The Cytoskeleton?
...tors and neurons. There are two main classes of photoreceptor
cells: rods and cones. Rods are responsible for...ion. RP leads to a preferential loss of the rod photoreceptor
cells and night blindness is one of the first clinical symptoms. During disease progression, c...
Two Brandeis Scientists Shed Light On The First Photoreceptor Known To Set
...says cryptochrome is almost certainly not the sole photoreceptor
atwork in setting circadian rhythms. "Cryptochrome harnesses the energy ofincoming blue light, but other molecules are probably needed to absorb light ofother colors," he says. Cryptochrome's penchant for blue light suggests itresets biological clock...
(Blue) Light At The End Of The Tunnel?
...veisolated the protein that is the UV-A/blue light photoreceptor
forphototropism the process whereby plants grow in...hromophore. Hence, they concluded that NPH1was the photoreceptor
for the phosphorylation reaction, as no otherplant proteins were present to play the role. Since the...
Researchers Find Fas Ligand Is Important In Blinding Disease
...tinal pigment epithelium (RPE). These cellsnourish photoreceptor
cells that convert light impulses into vision. If asurgeon removes abnormal vessels along with the RPE layer, the surgery probablywill not restore vision. The search for a different treatment for the disease led Kaplan, aretina surgeon, to T...
Mice show function of gene that causes two types of blindness
...ies the moleculetransported by RmP in the retina's photoreceptor
cells. When a mutation occursin ABCR, then RmP dys... RPE, which then cannot perform its role ofkeeping photoreceptor
cells healthy. The unhealthy cells begin to die, causingblindness. The lipofuscin accumulation seen ...
Photoreceptor gene mutations cause degenerative eye disease
...ffected individuals showed mutations in NR2E3 , a photoreceptor
gene that is also known as PNR (photoreceptor-sp...speculate that ESCS is caused by mistakes early in photoreceptor
development that cause an overabundance of blue cones relative to the number of red and green cones....
Light receptor may be key in how animals use Earth's magnetic field
Champaign, Ill. -- A blue-light photoreceptor
found in nerve layers of the eyes and brains has caught the attention of University of Illinois researchers who are seeking the magnetic compass that lets migratory birds and many other creatures find home using the magnetic field of Earth. The recep...
Researchers identify unique circadian rhythm photoreceptor
...that the fly cryptochrome dCRY is perhaps the only photoreceptor
molecule through which light regulates the fly's c...s to prove that dCRY is the major circadian rhythm photoreceptor
in this organism because there are no other photoreceptors that can pick up the light signal and dri...
Sightless cavefish may offer clues to eye growth, Science authors report
...tina of the eye with the implanted lens showed rod photoreceptor
cells, which are absent or rare in the degenerate cavefish eye. This shows that "the lens is able to stimulate the development of eye parts that have been lost during the past million or so years of cavefish evolution," Jeffery says. When the experim...
In gene therapy first, scientists restore vision to dogs born blind
...a child is 10 or 15 years old, the light-sensitive photoreceptor
cells are usually gone. At that point, putting in this gene isn't going to restore vision. So there almost certainly is going to be a window of treatability for LCA patients -- probably the younger the better." In their next phase of animal testing...
Spinach protein could offer new hope for the blind
...act in people with these diseases, their eyes lack photoreceptor
activity," said Eli Greenbaum of ORNLs Chemical Te...e possible to use Photosystem I protein to restore photoreceptor
activity. Experiments by Greenbaums team showed that Photosystem I protein can capture photon energy...
Illuminating how plants adapt to light
...e of known laboratory-induced mutants in the plant photoreceptor
molecules, called phytochromes. It was important t...rmal molecule by only a single amino acid. If this photoreceptor
is working properly, excitation by light induces a turnover of the protein. But with the LM-2 allele...
Comprehensive set of vision genes discovered: Identification could help in diagnosing and treating blinding diseases
...ople over age 75. The discovery of the full set of photoreceptor
genes expressed in the retinal cells, which was ma...ject, the researchers identified approximately 300 photoreceptor
genes five times the number that were previously known. Two hundred sixty four of these were newly ...
Dog 'model' for studying inherited human blindness
...man inherited vision disorders involve the loss of photoreceptor
cells in the eye's retina responsible for black-an...hich compromises the function and viability of the photoreceptor
cells. Since this mutation pattern in the RPGR gene is the same in humans and dogs, the study provi...
New way found to see light through novel protein identified by Dartmouth geneticists
...light and, subsequently, that WC-1 is actually the photoreceptor
protein. WC-1 is a transcription factor that partners with WC-2, and binds to DNA of light-regulated genes. Transcription factors are proteins whose role is to regulate expression of genes; they bind to DNA and turn on genes, Dunlap explains. "Thi...
40-year search is over: UT Southwestern researchers identify key photoreceptor in fungi
... July 4, 2002 After 40 years of searching for the photoreceptor
that controls multiple vital processes in fungi, r...t that the protein White Collar 1, or WC-1, is the photoreceptor
for light responses in fungi, which encompass yeast and mold. Fungi share with bacteria the importan...
Dartmouth researchers identify multi-tasking circadian protein
...s that a protein called White Collar-1 is both the photoreceptor
and the mechanism that turns on the frequency gene...of organisms, have already begun to understand how photoreceptor
proteins perceive light at the molecular level and then pass on this information through a complex s...
Dinosaur ancestor's vision possibly nocturnal
...the rest of the signal transduction cascade in the photoreceptor
cell; in other words, it interacted with the "second messenger," the G protein transducin. "Using a technique that measures the increase of fluorescence in the G protein transducin upon activation, we found, strikingly, that the archosaur rhodopsin ...
Scientists at the Scripps Research Institute discover how a plant times its flowering cycle
...ther genes as needed. For instance, plants use two photoreceptor
proteins--the blue light photoreceptor, "cryptochrome," and the red light photoreceptor
"phytochrome"--to control other genes. Like solar-powered clocks, phytochromes and cryptochromes are...
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