High impact information on Acidianus

• Redox-linked transient deprotonation at the binuclear site in the aa(3)-type quinol oxidase from Acidianus ambivalens: implications for proton translocation [1].
• We have investigated the kinetic and thermodynamic properties of carbon monoxide binding to the fully reduced quinol oxidase (cytochrome aa(3)) from the hyperthermophilic archaeon Acidianus ambivalens [2].
• Key role of cysteine residues in catalysis and subcellular localization of sulfur oxygenase-reductase of Acidianus tengchongensis [3].
• The ferredoxin from the thermoacidophile Acidianus ambivalens is a representative of the archaeal family of di-cluster [3Fe-4S][4Fe-4S] ferredoxins [4].
• Acyl coenzyme A carboxylase (acyl-CoA carboxylase) was purified from Acidianus brierleyi [5].

Biological context of Acidianus

• Active site structure of the aa3 quinol oxidase of Acidianus ambivalens [6].

Associations of Acidianus with chemical compounds

• Acidianus ambivalens type-II NADH dehydrogenase: genetic characterisation and identification of the flavin moiety as FMN [7].
• Analysis of known sulfur oxygenase-reductases (SORs) and the SOR-like sequences identified from public databases indicated that they all possess three cysteine residues within two conserved motifs (V-G-P-K-V-C(31) and C(101)-X-X-C(104); numbering according to the Acidianus tengchongensis numbering system) [3].
• A fully operative minimal version of Acidianus ambivalens respiratory system was successfully reconstituted into artificial liposomes, using three basic components isolated from the organism: the type-II NADH dehydrogenase, caldariella quinone, the organism-specific quinone, and the aa3 type quinol oxidase [8].
• The autotrophic CO2 fixation pathway in Acidianus brierleyi, a facultatively anaerobic thermoacidophilic archaebacterium, was investigated by measuring enzymatic activities from autotrophic, mixotrophic, and heterotrophic cultures [9].
• Metallosphaera sedula, Acidianus ambivalens and Sulfolobus sp. strain VE6 ( Sulfolobaceae) contained key enzymes of a 3-hydroxypropionate cycle [10].

Gene context of Acidianus

• Domain structure, GTP-hydrolyzing activity and 7S RNA binding of Acidianus ambivalens ffh-homologous protein suggest an SRP-like complex in archaea [11].
• An iron-containing superoxide dismutase (SOD; EC 1.15.1.1) of the hyperthermophilic archaeon Acidianus ambivalens (Aa-SOD) has been purified and characterized and the gene has been cloned and sequenced [12].
• The unusual iron sulfur composition of the Acidianus ambivalens succinate dehydrogenase complex [13].

Analytical, diagnostic and therapeutic context of Acidianus

• The hyperthermophilic archaeon Acidianus ambivalens expresses a membrane-bound aa(3)-type quinol oxidase, when grown aerobically, that we have studied by resonance Raman spectroscopy [1].
• A hydrogenase-sulfur reductase (SR) complex was purified from membrane preparations of the extremely thermophilic, acidophilic archaeon Acidianus ambivalens using a combination of sucrose density gradient centrifugation and column chromatography (FPLC) [14].

References