Navigation Links
Amoeba may offer key clue to photosynthetic evolution
Date:2/27/2012

on identifying organisms for which the events that resulted in the conversion of a bacterium into a host-dependent organelle occurred more recently.

Nowack and Grossman focused their research on a type of amoeba called Paulinella chromatophora, which contains two photosynthetic compartments that also originated from an endosymbiotic cyanobacterium, but that represent an earlier stage in the formation of a fully evolved organelle.

These compartments, called chromatophores, transferred more than 30 of the original cyanobacterial genes to the nucleus of the host organism. While gene transfer has been observed for other bacterial endosymbionts, the function of the transferred genes has been unclear, since it does not appear that the endosymbionts (in contrast to organelles) are equipped to recapture those proteins, because they do not have appropriate protein import machineries.

The Carnegie team honed in on three of the P. chromatophora transferred genes, which encode proteins involved in photosynthesis, a process localized to the chromatophore. They set out to determine whether these proteins are synthesized in the cytoplasm of the amoeba and whether the mature proteins became localized to the chromatophore.

Using an advanced array of research techniques, they were able to determine that these three proteins are synthesized in the cytoplasm and then transported into chromatophores, where they assemble together with other, internally encoded proteins into working protein complexes that are part of the photosynthetic process.

Interestingly, the process by which these proteins are transported into chromatophores may also be novel and involve transit through an organelle called the Golgi apparatus, prior to becoming localized to the chromatophore. This suggests the occurrence of an initial, rudimentary process for proteins to cross the envelope membrane of the nascent chloroplast. This process ultimately evolved into one t
'/>"/>

Contact: Eva Nowack
enowack@stanford.edu
650-739-4238
Carnegie Institution
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Human cells exhibit foraging behavior like amoebae and bacteria
2. Indigenous peoples at forefront of climate change offer lessons on plant biodiversity
3. Superbugs from space offer new source of power
4. Stem cell study in mice offers hope for treating heart attack patients
5. Padded headgear, boxing gloves may offer some protection for fighters
6. A bugs (sex) life: Diving beetles offer unexpected clues about sexual selection
7. Test and Treat model offers new strategy for eliminating malaria
8. Lungs clothed in fresh cells offer new hope for transplant patients
9. Maker of VSL#3 probiotic offers assistance program for ulcerative colitis and ileal pouch patients
10. Metadynamics technique offers insight into mineral growth and dissolution
11. SpringerLink now offers more than 50,000 eBooks
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/14/2015)... 2015 NXT-ID, Inc. (NASDAQ: NXTD ) ... on the growing mobile commerce market, announces that its ... New York Design Awards under the category  ,Product Design ... Design Awards are part of a global multi-disciplinary awards ... from the marketplace, industry and judging panel. Winners will ...
(Date:4/8/2015)... CHARLOTTE, N.C. , April 8, 2015 /PRNewswire/ ... technology solutions and services, and Morpho, a leading ... in partnership to produce the market,s most advanced ... Infinisource,s iSolved NXG time clock is setting ... attendance and labor data for the small and ...
(Date:4/2/2015)... , April 2, 2015 Fingerprint ... fingerprint sensor FPC1025 from the distributor World Peace Industrial ... during Q2 2015 although the major part of the ... will be used by smartphone manufacturers in ... is included in the communicated revenue guidance of + ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet Nominated for 2015 New York Design Awards in 'Product Design- Technology' 2NXT-ID's Wocket Smart Wallet Nominated for 2015 New York Design Awards in 'Product Design- Technology' 3iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 2iSolved Time Clock Offers Unmatched Accuracy due to Morpho Biometrics 3Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 110 Million 2
... throwing unwanted fish overboard from commercial boats could put one ... say researchers at the University of Leeds. , New research ... which gannets rely on unwanted fish and offal thrown from ... "The North Sea has undergone massive environmental changes over the ...
... Scientists at the Lombardi Comprehensive Cancer Center at Georgetown University ... to tease apart in the most comprehensive way ever ... cells in cancer development and treatment. This protein determines which ... and how she will fare during her treatment. The researchers, ...
... NEW YORK, March 22, 2010 The Juvenile ... for diabetes research worldwide, said today that it will ... Organization, and The Hebrew University of Jerusalem on drugs ... type 1 diabetes. The program, under the ...
Cached Biology News:Fishing discard ban could damage sea bird success, scientists warn 2Lombardi receives $7.5 million grant for Breast Cancer Center for Cancer Systems Biology 2Lombardi receives $7.5 million grant for Breast Cancer Center for Cancer Systems Biology 3JDRF, Pfizer, Hadassah Medical and the Hebrew University announce collaboration 2
(Date:4/24/2015)... San Diego, CA (PRWEB) April 24, 2015 ... San Diego and other San Diego area universities, including ... April 28 to judges from prominent local, national and ... seed funding in the 5th Annual Social Innovation ... finalists have proposed unique social venture ideas addressing a ...
(Date:4/24/2015)... , April 24, 2015 /PRNewswire/ - BioAmber Inc. ... Bayer MaterialScience as the supplier of bio-succinic acid ... bio-based polyurethanes for textile applications that Bayer MaterialScience ... has launched IMPRANIL ® eco, a series ... that reaches as high as 65%.  IMPRANIL ® ...
(Date:4/24/2015)... , April 24 , 2015 PAREXEL ... biopharmaceutical services provider, today announced that Partnerships in Clinical ... Product Management, the 2015 Clinical Innovator of the Year.  ... development team for the Company,s Perceptive MyTrials ® ... award Thursday night during the 2015 Partnership Awards in ...
(Date:4/23/2015)... Mount Dora, Florida (PRWEB) April 23, 2015 ... announced that it intends to conduct a groundbreaking ... can begin to be reversed in as little ... researchers—using the science of metabolic and nutritional medicine—will ... conditions that cripple and destroy our aging brain. ...
Breaking Biology Technology:5th Annual Social Innovation Challenge at University of San Diego - Students Pitch to Live Judging Panel to Take Home $75K 25th Annual Social Innovation Challenge at University of San Diego - Students Pitch to Live Judging Panel to Take Home $75K 3Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 2Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 3Bayer MaterialScience Names BioAmber As Its Supplier For New Product Line - Bio-succinic acid forms backbone of innovative new bio-based polyurethanes for textiles 4PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 2PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 3PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 4PAREXEL Honored With 2015 Clinical Innovator Of The Year Award From Partnerships In Clinical Trials 5New Study Looks to Reverse Alzheimer’s Disease 2New Study Looks to Reverse Alzheimer’s Disease 3
... standard to eradicate (100% kill) in seconds ... including MRSA and ... C. ... its Ygiene(TM) Hospital Grade antimicrobial against,antibiotic-resistant microorganisms and spore forms of ...
... With First Diagnostic Test Based on Company,s, microRNA Technology, Developed by Columbia University Medical Center, ... Approved for Clinical use Acquires CLIA-certified lab to Expedite ... microRNA-based Tests, Expands Pipeline ... ...
... VNUS(R) Medical,Technologies, Inc. (Nasdaq: VNUS ) ... year 2008 guidance. The Company has recorded adjustments,to ... sheet accounts,to record additional expenses related to stock-based ... since the adoption of Statement,of Financial Accounting Standard ...
Cached Biology Technology:BioNeutral's Ygiene(TM) New Hospital Grade Disinfectant Will Save Lives and Billions of Dollars Annually at Health Care Facilities Around the World 2BioNeutral's Ygiene(TM) New Hospital Grade Disinfectant Will Save Lives and Billions of Dollars Annually at Health Care Facilities Around the World 3BioNeutral's Ygiene(TM) New Hospital Grade Disinfectant Will Save Lives and Billions of Dollars Annually at Health Care Facilities Around the World 4Rosetta Genomics Reports Second Quarter 2008 Financial Results 2Rosetta Genomics Reports Second Quarter 2008 Financial Results 3Rosetta Genomics Reports Second Quarter 2008 Financial Results 4Rosetta Genomics Reports Second Quarter 2008 Financial Results 5Rosetta Genomics Reports Second Quarter 2008 Financial Results 6Rosetta Genomics Reports Second Quarter 2008 Financial Results 7Rosetta Genomics Reports Second Quarter 2008 Financial Results 8Rosetta Genomics Reports Second Quarter 2008 Financial Results 9Rosetta Genomics Reports Second Quarter 2008 Financial Results 10Rosetta Genomics Reports Second Quarter 2008 Financial Results 11Rosetta Genomics Reports Second Quarter 2008 Financial Results 12VNUS Corrects Second Quarter 2008 Results and Revises Full Year 2008 Guidance 2VNUS Corrects Second Quarter 2008 Results and Revises Full Year 2008 Guidance 3VNUS Corrects Second Quarter 2008 Results and Revises Full Year 2008 Guidance 4
Evolutionarily conserved signaling intermediate in Toll pathway...
Anti-MMP-25 (Membrane-type MMP-6, Mt6MMP), hinge region; rabbit host...
Sheep polyclonal to Streptomycin ( Abpromise for all tested applications). Antigen: Chemical / Small Molecule: Streptomycin conjugated to BSA....
Anti-ADAM-12 (Meltrin Alpha); amino terminal region; rabbit host...
Biology Products: