HOME >> BIOLOGY >> NEWS
Green plants share bacterial toxin

A toxin that can make bacterial infections turn deadly is also found in higher plants, researchers at UC Davis, the Marine Biology Laboratory at Woods Hole, Mass. and the University of Nebraska have found. Lipid A, the core of endotoxin, is located in the chloroplasts, structures that carry out photosynthesis within plant cells.

The lipid A in plant cells is evidently not toxic. The human intestine contains billions of Gram-negative bacteria, but lipid A does not become a problem unless bacteria invade the bloodstream.

"We've no idea what it's doing, but it must be something important because it's been retained for a billion years of evolution of plant chloroplasts," said Peter Armstrong, professor of molecular and cellular biology at UC Davis and senior author on the paper.

Endotoxin is better known to bacteriologists and physicians as part of the outer coat of Gram-negative bacteria such as E. coli. The lipid A core of bacterial endotoxin activates the immune system and can cause septic shock, a major cause of death from infection. It is distinct from the toxin found in E. coli strain 0157, responsible for the recent outbreak of food poisoning tied to spinach.

Bacteria were thought to be the only source of lipid A. However, R.L. Pardy, professor at the University of Nebraska-Lincoln, recently found a similar molecule in Chlorella, a single-celled relative of more advanced plants. Armstrong's lab at UC Davis developed methods to visualize lipid A in cells, using a protein from the immune system of the horseshoe crab, and the researchers began collaborating.

"It was one of those celebratory moments, when I looked in the microscope and saw these gloriously stained algal cells," Armstrong said, describing their first experiment. The group has now found lipid A in chloroplasts of garden pea plants as well as green algae, and Armstrong suspects that it is present in all higher plants with chloroplasts.

That idea i
'"/>

Contact: Andy Fell
ahfell@ucdavis.edu
530-752-4533
University of California - Davis
6-Nov-2006


Page: 1 2

Related biology news :

1. Green tea boosts production of detox enzymes, rendering cancerous chemicals harmless
2. Greenlands ancient forests shed light on stability of ice sheet
3. Green Junta
4. Green Nanotechnology: Its Easier Than You Think
5. Green tea and COX-2 inhibitors combine to slow growth of prostate cancer
6. Stevens Center for Science Writings honors Edward O. Wilson with Green Book Award
7. Green payments are the future of agricultural support
8. Green Chemical Reactor Engineering -- XI
9. Climate changes are linked between Greenland and the Antarctic
10. Mary Frances Lyon to receive Rockefellers Pearl Meister Greengard Prize
11. Green sturgeon receives threatened status

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/17/2018)... CASTLE ROCK, Colo. (PRWEB) , ... August 16, 2018 , ... ... for facioscapulohumeral muscular dystrophy (FSHD), announced that its Colorado Chapter will be holding its ... event, scheduled for September 8th at the Philip S. Miller Park, advocates for public ...
(Date:8/15/2018)... ... ... The Florida Chiropractic Association’s National Meeting on August 16th-19th in Orlando, ... U.S. will gain firsthand insights into the new laser’s advancements and superior treatment abilities. ... trial that has resulted in the granting of an FDA 510(k) market clearance for ...
(Date:8/14/2018)... ... 13, 2018 , ... NRD, LLC – NRD® is showcasing ... Gun. , The ionizing gun features ergonomic design and rugged construction. The ... and electropolished OSHA-compliant tip. This can be cleanroom packaged (P-2021-5502) or normally packaged ...
Breaking Biology News(10 mins):
(Date:8/31/2018)... ... 2018 , ... A recent expedition led by Dr. Blair ... of Industrial Science, the University of Tokyo, demonstrated how the use of autonomous ... of hard to reach deep sea ecosystems, like intermittently active methane seeps. Thanks ...
(Date:8/29/2018)... ... August 28, 2018 , ... CEO and founder of VetStem ... performed on an allogeneic (donor derived) stem cell product for osteoarthritis in canines ... in September. He is also the organizer of Breakout Session 4: Practitioner Primer ...
(Date:8/23/2018)... ... 22, 2018 , ... Crucial Data Solutions, Inc. announces the ... first fully-featured app for electronic data capture (EDC) and electronic participant reported outcomes ... percent of the market share for mobile devices worldwide; in turn, this enables ...
(Date:8/17/2018)... ... August 16, 2018 , ... ... pleased to announce the expansion of their team. Dr. Dawn Dufield, Ph.D., joins ... an innovative large molecule LC-MS/MS group that will specialize in developing quantitative LC-MS/MS ...
Breaking Biology Technology:
Cached News: