Title |
Evolution of vacuolar proton pyrophosphatase domains and volutin granules: clues into the early evolutionary origin of the acidocalcisome
|
---|---|
Published in |
Biology Direct, October 2011
|
DOI | 10.1186/1745-6150-6-50 |
Pubmed ID | |
Authors |
Manfredo J Seufferheld, Kyung Mo Kim, James Whitfield, Alejandro Valerio, Gustavo Caetano-Anollés |
Abstract |
Volutin granules appear to be universally distributed and are morphologically and chemically identical to acidocalcisomes, which are electron-dense granular organelles rich in calcium and phosphate, whose functions include storage of phosphorus and various metal ions, metabolism of polyphosphate, maintenance of intracellular pH, osmoregulation and calcium homeostasis. Prokaryotes are thought to differ from eukaryotes in that they lack membrane-bounded organelles. However, it has been demonstrated that as in acidocalcisomes, the calcium and polyphosphate-rich intracellular "volutin granules (polyphosphate bodies)" in two bacterial species, Agrobacterium tumefaciens, and Rhodospirillum rubrum, are membrane bound and that the vacuolar proton-translocating pyrophosphatases (V-H+PPases) are present in their surrounding membranes. Volutin granules and acidocalcisomes have been found in organisms as diverse as bacteria and humans. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 1 | 100% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Scientists | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 4 | 6% |
United Kingdom | 3 | 4% |
Portugal | 1 | 1% |
Germany | 1 | 1% |
Unknown | 61 | 87% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 25 | 36% |
Student > Ph. D. Student | 13 | 19% |
Student > Bachelor | 6 | 9% |
Student > Doctoral Student | 4 | 6% |
Professor > Associate Professor | 4 | 6% |
Other | 12 | 17% |
Unknown | 6 | 9% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 36 | 51% |
Biochemistry, Genetics and Molecular Biology | 13 | 19% |
Earth and Planetary Sciences | 4 | 6% |
Computer Science | 3 | 4% |
Environmental Science | 2 | 3% |
Other | 5 | 7% |
Unknown | 7 | 10% |