Zobrazeno 1 - 10
of 29
pro vyhledávání: '"T A, Krulwich"'
Publikováno v:
Journal of molecular microbiology and biotechnology. 3(2)
Tet(L) and Tet(K) are specific antibiotic-resistance determinants. They catalyze efflux of a tetracycline(Tc)-divalent metal complex in exchange for protons, as do other Tet efflux proteins. These Tet proteins also catalyze Na+ and K+ exchange for pr
Publikováno v:
Novartis Foundation symposium. 221
Monovalent cation/proton antiporters that catalyse electrogenic uptake of H+ in exchange for cytoplasmic K+ and/or Na+ are centrally involved in bacterial pH homeostasis under alkaline challenge. Systematic attempts have identified some, but not yet
Publikováno v:
Advances in microbial physiology. 40
The challenge of maintaining a cytoplasmic pH that is much lower than the external pH is central to the adaptation of extremely alkaliphilic Bacillus species to growth at pH values above 10. The success with which this challenge is met may set the up
Publikováno v:
The Journal of biological chemistry. 269(44)
The chromosomal tetB(L) gene of Bacillus subtilis encodes a transporter that catalyzes Na+/H+ antiport even more actively than tetracycline/H+ antiport, as shown by assays of membrane antiporter activity upon transformation of Na+/H+ antiporter-defic
Oxidative phosphorylation by ADP + P(i)-loaded membrane vesicles of alkaliphilic Bacillus firmus OF4
Autor:
A A, Guffanti, T A, Krulwich
Publikováno v:
The Journal of biological chemistry. 269(34)
ATP synthesis in ADP + P(i)-loaded membrane vesicles of the facultative alkaliphile Bacillus firmus OF4 at an external pH of 10.5 did not depend upon the presence of cell wall polymers, e.g. as a proton barrier or sequestration device. Upon energizat
Autor:
D M, Ivey, A A, Guffanti, J, Zemsky, E, Pinner, R, Karpel, E, Padan, S, Schuldiner, T A, Krulwich
Publikováno v:
The Journal of biological chemistry. 268(15)
DNA libraries from alkaliphilic Bacillus firmus OF4 had been screened earlier (Ivey, D.M., Guffanti, A.A., Bossewitch, J. S., Padan, E., and Krulwich, T. A. (1991) J. Biol. Chem. 266, 23483-23489) for clones that would functionally complement a strai
Publikováno v:
The Journal of biological chemistry. 268(1)
We have cloned and sequenced the DNA of alkaliphilic Bacillus firmus OF4 encompassing the cta operon that encodes a pH-regulated cytochrome caa3 oxidase. The gene organization is identical with that of the homologous Bacillus subtilis caa3 oxidase lo
Autor:
A A, Guffanti, T A, Krulwich
Publikováno v:
The Journal of biological chemistry. 267(14)
Oxidative phosphorylation by extremely alkaliphilic Bacillus species violates two major predictions of the chemiosmotic hypothesis: the magnitude of the chemiosmotic driving force, the delta p (electrochemical proton gradient), is too low to account
Publikováno v:
The Journal of biological chemistry. 266(34)
A gene has been cloned from a DNA library from alkaliphilic Bacillus firmus OF4 that functionally complements a mutant strain of Escherichia coli, NM81, that carries a deletion for one of that strain's Na+/H+ antiporter genes (delta nhaA). The cloned
Autor:
D B, Hicks, T A, Krulwich
Publikováno v:
The Journal of biological chemistry. 265(33)
The F1F0-ATP synthase from the alkaliphilic Bacillus firmus OF4 was purified in a reconstitutively active form, in good yield and with a high specific ATPase activity when appropriately activated. The purification procedure involved octyl glucoside e