H+-proton-pumping inorganic pyrophosphatase: a tightly membrane-bound family
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منابع مشابه
Proton pumping inorganic pyrophosphatase of endoplasmic reticulum-enriched vesicles from etiolated mung bean seedlings.
Endoplasmic reticulum (ER)-enriched vesicles from etiolated hypocotyls of mung bean seedlings (Vigna radiata) were successfully isolated using Ficoll gradient and two-phase (polyethylene glycol-dextran) partition. The ER-enriched vesicles contained inorganic pyrophosphate (PPi) hydrolysis and its associated proton translocating activities. Antiserum prepared against vacuolar H+-pyrophosphatase ...
متن کاملA proton pumping pyrophosphatase in acidocalcisomes of Herpetomonas sp.
Acidocalcisomes are acidic calcium storage organelles found in several microorganisms. They are characterized by their acidic nature, high electron density, high content of polyphosphates and several cations. Electron microscopy contrast tuned images of Herpetomonas sp. showed the presence of several electron dense organelles ranging from 100 to 300 nm in size. In addition, X-ray element mappin...
متن کاملA plant proton-pumping inorganic pyrophosphatase functionally complements the vacuolar ATPase transport activity and confers bafilomycin resistance in yeast.
V-ATPases (vacuolar H+-ATPases) are a specific class of multi-subunit pumps that play an essential role in the generation of proton gradients across eukaryotic endomembranes. Another simpler proton pump that co-localizes with the V-ATPase occurs in plants and many protists: the single-subunit H+-PPase [H+-translocating PPase (inorganic pyrophosphatase)]. Little is known about the relative contr...
متن کاملMembrane-bound proton-translocating pyrophosphatase of Syntrophus gentianae, a syntrophically benzoate-degrading fermenting bacterium.
Syntrophus gentianae is a strictly anaerobic bacterium which ferments benzoate to acetate, CO2 and H2 in the presence of hydrogen-utilizing partner bacteria. Benzoate is activated by a benzoyl CoA ligase enzyme which forms AMP and pyrophosphate as coproducts. Pyrophosphatase activity was found to be largely membrane bound. Pyrophosphate hydrolysis was associated with proton translocation across...
متن کاملCharacterization of plasma membrane bound inorganic pyrophosphatase from Leishmania donovani promastigotes and amastigotes.
BACKGROUND Currently, a major problem in the management of visceral leishmaniasis or kala-azar, especially in the Indian subcontinent, is the growing unresponsiveness to conventional antimonial therapy. Membrane bound pyrophophatase (PPases) do not exist in plasma membrane from mammals. Thus, H(+)-PPases from Leishmania plasma membrane might be potential target in rational chemotherapy of the d...
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ژورنال
عنوان ژورنال: FEBS Letters
سال: 1999
ISSN: 0014-5793
DOI: 10.1016/s0014-5793(99)00617-1