Aquaporins
Mostrando 13-24 de 82 artigos, teses e dissertações.
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13. From genome to function: the Arabidopsis aquaporins
The aquaporins are membrane proteins that have been characterized as facilitators of water flux. The Arabidopsis genome contains 38 sequences with homology to aquaporin in four subfamilies. Using the A. thaliana genome sequence, aquaporin family structure and expression have been analyzed.
BioMed Central.
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14. The major intrinsic protein family of Arabidopsis has 23 members that form three distinct groups with functional aquaporins in each group.
Aquaporins, proteins that enhance the permeability of biological membranes to water, are widely distributed in living organisms. They are 26- to 29-kD proteins that belong to the major intrinsic protein (MIP) family of channels. By searching the Arabidopsis thaliana expressed sequence tag database and by using the polymerase chain reaction with oligonucleoti
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15. Overexpression of a Plasma Membrane Aquaporin in Transgenic Tobacco Improves Plant Vigor under Favorable Growth Conditions but Not under Drought or Salt Stress
Most of the symplastic water transport in plants occurs via aquaporins, but the extent to which aquaporins contribute to plant water status under favorable growth conditions and abiotic stress is not clear. To address this issue, we constitutively overexpressed the Arabidopsis plasma membrane aquaporin, PIP1b, in transgenic tobacco plants. Under favorable gr
American Society of Plant Biologists.
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16. PIP1 Aquaporins Are Concentrated in Plasmalemmasomes of Arabidopsis thaliana Mesophyll.
The PIP1 subfamily of water channel proteins (aquaporins) constitute about 1% of the plasma membrane (PM) proteins from Arabidopsis thaliana leaves. Immunogold electron microscopy has confirmed their localization at the PM of mesophyll cells. Very high labeling density at PM invaginations known as plasmalemmasomes was observed. Therefore, we suggest that the
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17. Plasma Membrane Aquaporins Play a Significant Role during Recovery from Water Deficit1
The role of plasma membrane aquaporins (PIPs) in water relations of Arabidopsis was studied by examining plants with reduced expression of PIP1 and PIP2 aquaporins, produced by crossing two different antisense lines. Compared with controls, the double antisense (dAS) plants had reduced amounts of PIP1 and PIP2 aquaporins, and the osmotic hydraulic conductivi
American Society of Plant Biologists.
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18. Architecture and Selectivity in Aquaporins: 2.5 Å X-Ray Structure of Aquaporin Z
Aquaporins are a family of water and small molecule channels found in organisms ranging from bacteria to animals. One of these channels, the E. coli protein aquaporin Z (AqpZ), has been shown to selectively conduct only water at high rates. We have expressed, purified, crystallized, and solved the X-ray structure of AqpZ. The 2.5 Å resolution structure of A
Public Library of Science.
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19. Plasma Membrane Aquaporins Are Involved in Winter Embolism Recovery in Walnut Tree1
In perennial plants, freeze-thaw cycles during the winter months can induce the formation of air bubbles in xylem vessels, leading to changes in their hydraulic conductivity. Refilling of embolized xylem vessels requires an osmotic force that is created by the accumulation of soluble sugars in the vessels. Low water potential leads to water movement from the
The American Society for Plant Biologists.
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20. Role of a Single Aquaporin Isoform in Root Water Uptake
Aquaporins are ubiquitous channel proteins that facilitate the transport of water across cell membranes. Aquaporins show a typically high isoform multiplicity in plants, with 35 homologs in Arabidopsis. The integrated function of plant aquaporins and the function of each individual isoform remain poorly understood. Matrix-assisted laser desorption/ionization
American Society of Plant Biologists.
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21. NEW EMBO MEMBER’S REVIEW: The importance of aquaporin water channel protein structures
The history of the water channel and recent structural and functional analyses of aquaporins are reviewed. These ubiquitous channels are important for bacteria, plants and animals, exhibit a pronounced sequence homology and share functional as well as structural similarities. Aquaporins allow water or small specific solutes to pass unhindered, but block the
Oxford University Press.
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22. Aquaporins and the respiratory system: advice for a lung investigator
American Society for Clinical Investigation.
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23. Aquaporins: the molecular basis of facilitated water movement through living plant cells?
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24. Aquaporins: translating bench research to human disease
There is considerable potential for translating knowledge of aquaporin structure, function and physiology to the clinic. One area is in aquaporin-based diagnostics. The discovery of AQP4 autoantibodies as a marker of the neuromyelitis optica form of multiple sclerosis has allowed precise diagnosis of this disease. Other aquaporin-based diagnostics are po
Company of Biologists.