Advanced searches left 3/3

Atp Synthase - Astrophysics Data System

Summarized by Plex Scholar
Last Updated: 10 October 2022

* If you want to update the article please login/register

The c-ring stoichiometry of ATP synthase is adapted to cell physiological requirements of alkaliphilic Bacillus pseudofirmus OF4

The number of ions transferred during enzyme fermentation is determined by c-ring stoichiometry, which has a direct influence on cell bioenergetics' ion-to-ATP ratio, a defining characteristic of cell bioenergetics. Mutants with alanine-to-glycine transformations altering our alanine-to-glycine transformations were discovered to have smaller c 12 rings compared to the WT c 13. The c 12 mutants' molar growth yields of B. pseudofirmus OF4 cells on malate were even smaller than expected on limiting malate at elevated pH, according to the molar growth yields. The mutant ATP synthases with either c 12 or c 13 can promote ATP synthesis, but also highlight the critical importance of an alanine motif with c 13 ring stoichiometry for optimal growth at pH > 10.

Source link: https://ui.adsabs.harvard.edu/abs/2013PNAS..110.7874P/abstract


Subunit rotation of ATP synthase embedded in membranes: a or β subunit rotation relative to the c subunit ring

We engineered F o F 1 to check the rotation of the catalytic F 1 0. u03b2 or membrane sector F o a subunit, when the F o c subunit was immobilized; a biotin-tag was added to the u03b2 or a subunit; and a His-tag was attached to the c subunit's ring; and a His-tag was attached to the c subunit a subunit ring Fragments of the engineered F o F 1 were extracted from Escherichia coli cells containing the recombinant plasmid for the engineered F o F 1 and were immobilized on a glass surface and were etched on a glass surface.

Source link: https://ui.adsabs.harvard.edu/abs/2002PNAS...9913448N/abstract


Structure of the ATP synthase from Mycobacterium smegmatis provides targets for treating tuberculosis

Humans with TB, other common infectious diseases, such as tuberculosis, are among those in the global fight, and those with TB are more likely to die from COVID-19 infections. However, BD-resistant M. tuberculosis strains have emerged. Potentially these characteristics can be exploited in the development of new anti-TB drugs unrelated to BD to prevent and cure TB by inhibiting the pathogen's production of ATP.

Source link: https://ui.adsabs.harvard.edu/abs/2021PNAS..11811899M/abstract


The structure of the membrane extrinsic region of bovine ATP synthase

At a resolution of 3. 2 u00e5, the configuration of the complex involving bovine mitochondrial F 1 -ATPase and a stator subcomplex has been established. The stator is linked to F 1 ATPase by the OSCP's N-terminal domain, according to u03b1-helical contacts with the N-terminal area of subunit u03b1 E. Subunit b extends as a continuous 160-u00e5-helix from residue 188 back to residue 79 near to the outer mitochondrial membrane's surface. The linker region between the two domains of the OSCP also appears to be flexible, allowing the stator to change its shape as it passes through the changing profile of the F1 domain during a catalytic cycle. The cellular extrinsic portion of bovine ATP synthase's membrane extrinse synthase is now complete.

Source link: https://ui.adsabs.harvard.edu/abs/2009PNAS..10621597R/abstract


The product of uncI gene in F 1 F o -ATP synthase operon plays a chaperone-like role to assist c-ring assembly

F 1 F o ATP synthase enzymes contain uncI gene that encodes a function-unknown small hydrophobic protein. When we created a hybrid F1 F o in Escherchia coli cells, we discovered that uncI obtained from P. modestum was vital to produce active enzyme; without uncI, c-subunits in F 1 F o existed as monomers but not as effective c 11 ring. When uncI was released from another plasmid at the same time, a working F 1 F o with c 11 rings was produced.

Source link: https://ui.adsabs.harvard.edu/abs/2007PNAS..10420776S/abstract


14-3-3 protein is a regulator of the mitochondrial and chloroplast ATP synthase

Mitochondrial and chloroplast ATP synthases are two primary enzymes in plant metabolism, providing cells with ATP, the universal energy currency. ATP synthases are synthese by a transmembrane electrochemical proton gradient, which promotes ATP synthesis. Here we discuss a role for 14-3-3 proteins in the regulation of ATP synthases. We recently discovered 14-3-3 proteins in chloroplasts, and we show here that plant mitochondria harbor 14-3-3s are present within the inner mitochondrial-membrane compartment. The rapid decline in chloroplast ATPase activity during dark adaptation was blocked by a phosphopeptide with the 14-3-3 interaction motif, indicating a role for endogenous 14-3-3 in the down-regulation of the CF o F 1's downregulation. We conclude that controlling the ATP synthases by 14-3-3 represents a means for plant adaptation to environmental changes such as light/dark transitions, anoxia in roots, and fluctuations in nutrient supply.

Source link: https://ui.adsabs.harvard.edu/abs/2001PNAS...98.4249B/abstract


F 1 -dependent translation of mitochondrially encoded Atp6p and Atp8p subunits of yeast ATP synthase

The yeast mitochondria synthase is made of 17 different subunit polypeptides. According to our findings, translation of Atp6p and Atp8p is started by F1 ATPase. In mitochondrial DNA, F1 mutants are also unable to express ARG8 m when this normally nuclear gene is substituted for ATP6 or ATP8. In the absence of F1, translational activation by F1 is also supported by the fact that ATP22, an Atp6p-specific translation factor, has the ability to restore Atp6p and to a lesser degree Atp8p synthesis in the absence of F1.

Source link: https://ui.adsabs.harvard.edu/abs/2009PNAS..10618509R/abstract


Aqueous access pathways in subunit a of rotary ATP synthase extend to both sides of the membrane

Subunit A's role in encouraging proton transfer and rotary motion in the Escherichia coli F1 F o ATP synthase is unclear. Aqueous access paths have been traced to surfaces of aTMH4-edited subunit c. In the membrane-bound F o sector of the enzyme, H+ binding and release occur at Asp-61 in the middle of the second transmembrane helix of subunit c. During the H+ transport cycle, a swiveling of helices in this bundle's interior may be able to separate cytoplasmic and periplasmic half channels, exposing cytoplasmic and periplasmic half channels to cAsp-61.

Source link: https://ui.adsabs.harvard.edu/abs/2003PNAS..10013179A/abstract


ATP-driven stepwise rotation of F o F 1 -ATP synthase

ATP synthase is a motor enzyme that couples ATP synthesis/hydrolysis with a transmembrane proton translocation. The F 1, a water-soluble ATPase portion of F o F 1's, reverses by repeating ATP-waiting dwell, 8001b0 substep rotation, catalytic dwell, and 40u00b0-substep rotation. Comparison with F1's rotation, the F o F 1's rotation has yet to be fully understood, and here we explored ATP-driven rotations of F o F 1. In the immobile F o F 1, an 80-nm bead was attached to the ring of c subunits and caught with a sub-second fast camera. F o F 1's rotational pattern mimics that of F1. This finding shows that "friction" in F o motor is negligible during the ATP-driven rotation, according to this report.

Source link: https://ui.adsabs.harvard.edu/abs/2005PNAS..102.1333U/abstract


Endothelial cell surface F 1 -F O ATP synthase is active in ATP synthesis and is inhibited by angiostatin

Although the mechanism of angiostatin action is unclear, the identification of F1-F O ATP synthase as the key angiostatin-binding site on the endothelial cell surface suggests that ATP metabolism may have a role in angiostatin response. Previous studies revealing the presence of F1 ATP synthase subunits on endothelial cells and certain cancer cells did not determine whether this enzyme was active in ATP synthesis, but not determine whether this enzyme was active in ATP synthesis. All components of the F1 ATP synthalytic core are present on the endothelial cell surface, where they colocalize into distinct punctate structures. Both ATP synthase and ATPase activities of the enzyme are impeded by angiostatin and antibodies directed against the u03b1- and u03b2-subunits of ATP synthase in cell-based and biochemical assays.

Source link: https://ui.adsabs.harvard.edu/abs/2001PNAS...98.6656M/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions