Navigation Links
New RNA polymerase discovered in plants

Biologists at Washington University in St. Louis have discovered an entirely new cellular "machine" in plants that plays a significant role in plant flowering and DNA methylation, a key chemical process essential for an organism's development.

A team headed by Craig Pikaard, Ph, D., Washington University professor of biology in Arts & Sciences, has discovered a fourth kind of RNA polymerase found only in plants and speculated to have been a plant feature for more than 200 million years.

RNA polymerase is an enzyme, or protein machine, essential for carrying out functions of cells and for expression of biological traits. It does its job by copying a template of DNA genetic information in order to make RNAs that encode proteins or that function directly in the cell.

Biologists have studied three kinds of RNA polymerase for decades in organisms ranging from brewer's yeast to humans. In all eukaryotes, the RNA polymerases Pol I, II, and III perform the same distinct , though separate, functions in different species.

But then along came Pol IV. Pikaard first noticed the evidence for a fourth polymerase when analyzing gene sequences after Arabidopsis thaliana , the "laboratory rat" of the plant world, was sequenced in 2001. It originally looked to him like an alternative form of either Polymerase I (Pol I), which makes the largest of the ribosomal RNAs, Pol II which makes RNAs for protein-coding genes, or Pol III, a specialist in making the shortest of the ribosomal RNAs and tRNAs.

The big 'subunit'

He and his colleagues looked specifically at two polypeptides that would be the key subunits if the fourth polymerase were functional, namely the largest and second largest subunits, what Pikaard refers to as the catalytic, or "business end" of any known polymerase.

"So, we took a reverse-genetics approach" said Pikaard. " We thought: 'What happens if we knock these genes out?' So, we knocked out the genes responsible
'"/>

Source:Washington University in St. Louis


Page: 1 2 3

Related biology news :

1. Newly-discovered class of genes determines ?and restricts ?stem cell fate
2. Newly discovered virus linked to childhood lung disorders and Kawasaki disease
3. New protein discovered by Hebrew University researchers
4. Newly discovered pathway might help in design of cancer drugs
5. New tumor-suppressor gene discovered
6. Newly discovered protein an important tool for sleeping sickness research
7. Function of new cancer genes discovered
8. Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils
9. Natural tumor suppressor in body discovered by UCSD medical researchers
10. Enzymes newly discovered role may make it target for arthritis treatment
11. Newly discovered genetic disease sheds light on bodys water balance
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: New RNA polymerase discovered plants

(Date:4/17/2014)... honored Clemson professor Rajendra Singh Thursday as a ... and expand solar deployment in the residential, commercial ... Banks Professor of Electrical and Computer Engineering and ... considered a local hero leading the charge across ... in solar power and driving policy changes at ...
(Date:4/17/2014)... honeybees in Europe, Asia and the United States are ... be impacting native honeybee populations at this time, according ... include including Nosema microsporidia and Varroa ... resilient to these invasive pests, which suggests to us ... Asia and the United States currently are not necessary ...
(Date:4/17/2014)... Researchers in France have hit on a novel ... receive the correct and most effective treatment possible., ... the western and developing world. If left untreated, ... to renal failure and other complications. In many ... problem. Clearly a more effective pathological approach to ...
Breaking Biology News(10 mins):White House honors Clemson professor as 'Champion of Change' for solar deployment 2East African honeybees are safe from invasive pests… for now 2East African honeybees are safe from invasive pests… for now 3
... throughout the world and ensuring safe water supplies would do ... any other possible measure, according to an analysis released today ... water and sanitation reduces poverty in three ways. ... entrepreneurs; , Significant savings are achieved in the ...
... Researchers have discovered a mechanism for the rapid growth seen ... The tumors, which are made up of proliferating blood ... descent, with girls more frequently afflicted than boys. The ... blood-red lump on the head or facethen grow rapidly in ...
... Missouri Botanical Garden in St. Louis operates one of ... and the second largest in the western hemisphere. With ... a gigantic new aroid species from Ecuador, the ... has reached a milestone of six million specimens. ...
Cached Biology News:Providing toilets, safe water is top route to reducing world poverty: UN University 2Providing toilets, safe water is top route to reducing world poverty: UN University 3Providing toilets, safe water is top route to reducing world poverty: UN University 4Providing toilets, safe water is top route to reducing world poverty: UN University 5Researchers identify Achilles heel of common childhood tumor 2Missouri Botanical Garden mounts milestone 6 millionth herbarium specimen 2Missouri Botanical Garden mounts milestone 6 millionth herbarium specimen 3
(Date:1/14/2014)... and BETHESDA, Md. , ... joining together with two institutes from the National Institutes ... tools for bringing safer, more effective treatments to patients ... National Center for Advancing Translational Sciences (NCATS) and the ...
(Date:1/14/2014)... , Jan. 14, 2014  RXi Pharmaceuticals Corporation ... developing and commercializing innovative therapies addressing major unmet ... it received the Notice of Allowance from the ... unique self-delivering RNAi compounds (sd-rxRNA®), for the treatment ...
(Date:1/14/2014)... Washington, USA, and Cardiff, UK (PRWEB) January 13, 2014 ... photonics technology development leader with more than 20 years ... society for optics and photonics . Hainsey will serve ... are delighted to have Dr. Hainsey join SPIE as ...
(Date:1/14/2014)... 2014 Independent publisher Bitingduck Press, with ... Canada, has big ideas for 2014 in production and ... are to produce high-quality, low-cost, DRM-free ebooks and to ... , The first major development will be bookstore ...
Breaking Biology Technology:Organovo Announces Collaboration with National Institutes of Health 2Organovo Announces Collaboration with National Institutes of Health 3RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3Photonics R&D Leader Bob Hainsey Joins SPIE Technical Staff 2Bitingduck Press Looks Forward to 2014 With Multimedia E-books 2
... Genzyme Corp. said on Wednesday it has agreed ... Wisconsin-Madison biotech spinoff, for $600 million in cash. , ,Bone ... more than $2 billion and almost 7,000 employees worldwide, plan ... companies recently reported healthy quarterly profits and revenues. Bone Care ...
... a new copy machine for $57,000. , ,The Z-Corp ... typical office copier: It makes three-dimensional models of small structures ... , ,Using white polymer powder and colored inks, the printer ... a time. Z-Corp is headquartered in Burlington, Massachusetts. , , ...
... can submit executive summaries of their businesses for angel ... May 9. , ,The Wisconsin Angel Network ... investor networks with entrepreneurs based on the investors' market ... a deal-flow pipeline, has been designed to be a ...
Cached Biology Technology:Massachusetts firm to buy UW spinoff Bone Care for $600 million 2Massachusetts firm to buy UW spinoff Bone Care for $600 million 3Start-ups, angels can connect on new state Web site 2Start-ups, angels can connect on new state Web site 3
...
... Multidizer is designed with a variety of ... - all in one unit. Shake, rock, ... operating compartments allow for hybridization and blotting ... , The upper chamber uses a ...
... sleek design loaded with class-leading features, the 1400 Series ... work is safe and consistent every time you use ... 1400 Series reduces power consumption by as much as ... over the life of the cabinet. Multiply this ...
... Concentrator, the SPD series takes the 'Classic' ... twist., The SPD121P SpeedVac comes equipped with ... runs; preventing samples from freezing; and allowing ... end-users preset level., Standard features on the ...
Biology Products: