Survival tactics in bacteria - environmental conditions fit for mankind

Scientists from Imperial College, London, have made an important evolutionary link between the two powerhouse protein complexes that drive photosynthesis. This shared evolutionary adaptation may have been crucial for the establishment of environmental conditions required for the emergence of humankind.

For decades, scientists have debated whether there is a common evolutionary origin for the different photosynthetic (1) organisms present today.

Reporting in todays Nature journal, scientists from the Wolfson Laboratories, Department of Biological Sciences, Imperial College, now provide evidence for a link.

They have discovered a new protein supercomplex in the photosynthetic pathway that links two major proteins that were previously thought to work autonomously.

The key proteins Photosystem I (PSI) and Photosystem II (PSII), work together in the photosynthetic pathway to produce oxygen, and energy for plants to grow (2).

The Imperial researchers investigated the possibility of this link using cyanobacteria, a major photosynthetic producer in the worlds oceans. Tom Bibby and colleagues were investigating the role of a PSII-like protein that is produced by cyanobacteria in conditions of low-iron availability (3). They expected this protein to interact with PSII, due to its DNA sequence similarity with one of its proteins.

By recreating 'iron-stress response' conditions in cyanobacteria, the team found that this PSII-like protein interacts, surprisingly, with PSI, by forming a light harvesting antenna of 18 chlorophyll molecules around the protein complex.

The presence of the antenna increases the light harvesting ability by approximately 72 per cent compared with that of the normal PSI alone.

This means that cyanobacteria can produce oxygen even in low iron conditions. This adaptation would have global environmental significance - both for creating the levels of oxygen in the atmosphere that allowed the

Contact: Taslima Khan
Imperial College London

Page: 1 2

Related biology news :

1. Survival strategies in nature
2. Survival of the fastest: scientists selectively breed winning Formula One cars
3. Ecology lab aids Turtle Survival Alliance
4. Survival of quaking aspen groves a complex problem
5. Study Suggests Vaccine Increases Survival In Ovarian And Breast Cancer Patients Following High-Dose Chemotherapy And Autologous Stem Cell Transplant
6. Survival Of The Yellowstone Grizzlies, Ferns As Forest Filters And The Role Of Worms In Climate Change: The April Edition Of Ecology Is Now Available
7. A Versatile Signal In Vertebrate Embryogenesis: Wnt-4 Regulates Kidney Development, Sex Organ Differentiation, Neuronal Survival And Axonal Guidance
8. Dietary Vitamin A Supplements Improve Maternal Survival In South Asia
9. Cell Suicide Prevented By Survival Signals
10. Oxygen-Carrying Myoglobin Not Necessary For Survival
11. Combination Therapy For Brain Tumors Holds Promise For Longer Survival After Surgery

Post Your Comments:

(Date:11/27/2019)... ... November 27, 2019 , ... ... device, equipped with surface electromyography (sEMG) sensors that measure and display muscle activity ... the specific muscles being targeted for treatment. Both patient and therapist can see ...
(Date:11/19/2019)... ... November 19, 2019 , ... The inaugural Cell & Gene Therapy ... York City. The one-day event will be chaired by Dr Aiman Shalabi, VP R&D, ... space. , “We are witnessing significant innovation in cell and gene therapies, and ...
(Date:11/12/2019)... ... November 12, 2019 , ... ... the design and manufacturer of technical ergonomic seating solutions, announced this week ... with Healthier Hospital Initiative guidelines. Established by Practice Greenhealth, a health care ...
Breaking Biology News(10 mins):
(Date:11/6/2019)... ... 2019 , ... Diversified Technologies, Inc. has introduced a PEF production ... to improve processing. , The DTI Industrial PEF Unit can pre-treat whole pieces of ... yields by up to 50% and achieve up to an 80% reduction of drying ...
(Date:11/5/2019)... TORONTO (PRWEB) , ... November 05, 2019 , ... ... cancer technology, announced it has received CE Mark for its Fusion Bx 2.0 ... semi-robotic arm and user-friendly interface, the Fusion Bx 2.0 will give urologists across ...
(Date:11/2/2019)... TORONTO (PRWEB) , ... October 31, 2019 , ... ... at Adaptive Biotechnologies in a live webinar on Friday, ... application in immuno-oncology. , Immunosequencing, the science of profiling T-cell receptors (TCRs) ...
(Date:10/30/2019)... ... October 30, 2019 , ... Western University of Health Sciences ... technology play in educating the next generation of health care providers. , The ... by WesternU administrators and representatives of companies working with the University on a ...
Breaking Biology Technology:
Cached News: