Complexation of uranium(VI) with glycerol 1-phosphate

Koban, Astrid; Bernhard, Gert

doi:10.1016/j.poly.2004.04.022

Cited by 20 publications

(15 citation statements)

References 17 publications

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“…1 ) and uranyl-adenosine monophosphate ( Table 2 ). In addition, very similar TRLFS data were obtained in studies investigating the U(VI) complexation by isolated bacterial cell wall compounds ( Table 2 ), such as glycerol-1-phosphate [36] as well as o -phosphoethanolamine (NH 3 CH 2 CH 2 OPO 3 − ) and 1,2-dimyristoyl-sn-glycero-3-phosphate (DMGP) [37] that represent the polar head and the non-polar tail of phospholipids, the major components of cell membranes. Time-resolved analyses revealed a bi-exponential luminescence decay ( Table 3 ) with luminescence lifetimes of around 3 µs (τ 1 ) and 30 µs (τ 2 ) in all samples incubated at pH 2 and pH 3.…”

Section: Resultssupporting

confidence: 66%

Decrease of U(VI) Immobilization Capability of the Facultative Anaerobic Strain Paenibacillus sp. JG-TB8 under Anoxic Conditions Due to Strongly Reduced Phosphatase Activity

et al. 2014

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Interactions of a facultative anaerobic bacterial isolate named Paenibacillus sp. JG-TB8 with U(VI) were studied under oxic and anoxic conditions in order to assess the influence of the oxygen-dependent cell metabolism on microbial uranium mobilization and immobilization. We demonstrated that aerobically and anaerobically grown cells of Paenibacillus sp. JG-TB8 accumulate uranium from aqueous solutions under acidic conditions (pH 2 to 6), under oxic and anoxic conditions. A combination of spectroscopic and microscopic methods revealed that the speciation of U(VI) associated with the cells of the strain depend on the pH as well as on the aeration conditions. At pH 2 and pH 3, uranium was exclusively bound by organic phosphate groups provided by cellular components, independently on the aeration conditions. At higher pH values, a part (pH 4.5) or the total amount (pH 6) of the dissolved uranium was precipitated under oxic conditions in a meta-autunite-like uranyl phosphate mineral phase without supplying an additional organic phosphate substrate. In contrast to that, under anoxic conditions no mineral formation was observed at pH 4.5 and pH 6, which was clearly assigned to decreased orthophosphate release by the cells. This in turn was caused by a suppression of the indigenous phosphatase activity of the strain. The results demonstrate that changes in the metabolism of facultative anaerobic microorganisms caused by the presence or absence of oxygen can decisively influence U(VI) biomineralization.

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Section: Resultssupporting

confidence: 66%

Decrease of U(VI) Immobilization Capability of the Facultative Anaerobic Strain Paenibacillus sp. JG-TB8 under Anoxic Conditions Due to Strongly Reduced Phosphatase Activity

et al. 2014

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“…The red-shift of the peak maxima of about 8 nm, caused by the complexing agents phosphocholine, O-phosphoethanolamine, and O-phosphoserine, is comparable to the shift caused by some other phosphonates like glycerol 1-phosphate (phosphoglycerol) [17], O-phospho-L-threonine [33], fructose 6-phosphate [34], and adenosine 5 0 -triphosphate (ATP) [35]. As a consequence, organic uranyl phosphonate complexes are clearly distinguishable from inorganic uranyl phosphates, which show a stronger redshift of about 10 nm [21,22,32] (see Table 1).…”

Section: Phosphonatesmentioning

confidence: 72%

“…However, it is obvious that O-phosphoserine has the strongest complex behavior of the phosphonates investigated in this study. Only the recently studied phosphoglycerol, which also plays an important role both as polar head group and basic unit of phospholipids, seems to be a stronger complexing agent for the uranyl ion (see Table 2) [17].…”

Section: Phosphonatesmentioning

confidence: 99%

“…The phospholipids can be separated formally into the apolaric site, consisting of various fatty acids bounded to glycerin, and of the polar head group, consisting in several phosphorylated alcohols (phosphonates, R-O-PO 2À 3 Þ such as phosphoglycerol, phosphocholine, O-phosphoethanolamine, or O-phosphoserine. The complex behavior of the phosphoglycerol-uranyl system has been described recently [17].…”

Section: Introductionmentioning

confidence: 99%

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Uranium(VI) complexes with phospholipid model compounds – A laser spectroscopic study

Koban

Bernhard

2007

Journal of Inorganic Biochemistry

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“…2 at 320 nm excitation. The fluorescent spectrum reflects the symmetrical vibration of the U-O bond, similar to other uranyl-containing materials [15][16][17][18][19][20][21][22][23][24]. The observed emission bands correspond to the electronic transition S 10 !…”

mentioning

confidence: 53%

An organic–inorganic hybrid uranyl nicotinate molybdate polymer and its fluorescent property

Kong¹,

Ren²,

Liu³

et al. 2007

Inorganic Chemistry Communications

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Complexation of uranium(VI) with glycerol 1-phosphate

Cited by 20 publications

References 17 publications

Decrease of U(VI) Immobilization Capability of the Facultative Anaerobic Strain Paenibacillus sp. JG-TB8 under Anoxic Conditions Due to Strongly Reduced Phosphatase Activity

Decrease of U(VI) Immobilization Capability of the Facultative Anaerobic Strain Paenibacillus sp. JG-TB8 under Anoxic Conditions Due to Strongly Reduced Phosphatase Activity

Uranium(VI) complexes with phospholipid model compounds – A laser spectroscopic study

An organic–inorganic hybrid uranyl nicotinate molybdate polymer and its fluorescent property

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