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  • 1995-1999  (4)
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Material
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  • 1
    Electronic Resource
    Electronic Resource
    formation for phenylethylamine oxidase expressed in Escherichia coli K-12 (1995)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 133 (1995), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Arthrobacter globiformis amine oxidase produced by Escherichia coli cells grown in copper-depleted media was reported to undergo activation due to formation of its topaquinone cofactor in a copper-dependent autocatalytic reaction. Likewise, a mutated E. coli amine oxidase located in the cytoplasm was reported to form topaquinone autocatalytically in an EDTA-sensitive reaction. Here we show unequivocally that formation of an amine oxidase lacking topaquinone is primarily a consequence of the location of the enzyme in the cytoplasm rather than the level of copper in the growth medium. For E. coli, insertion of copper into apoamine oxidase and subsequent topaquinone formation occur after export of the apoenzyme into the periplasm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1995.tb07896.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Rhombohedral crystals of 2-dehydro-3-deoxygalactarate aldolase from Escherichia coli (1999)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 55 (1999), S. 1368-1369 
    Details
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: 2-Dehydro-3-deoxygalactarate (DDG) aldolase (E.C. 4.1.2.20) catalyzes the reversible aldol cleavage of DDG and 2-dehydro-3-deoxyglucarate to pyruvate and tartronic semialdehyde. Rhombohedral crystals of recombinant DDG aldolase from Escherichia coli K-12 were obtained. The crystals belong to space group R32 with unit-cell parameters a = 93 Å, α = 85°. The crystals diffract to beyond 1.8 Å resolution on a Cu Kα rotating-anode generator. The asymmetric unit is likely to contain two molecules, corresponding to a packing density of 1.34 Å3 Da−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0907444999006502
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    On the amine oxidases of Klebsiella aerogenes strain W70 (1997)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 146 (1997), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Klebsiella aerogenes W70 was reported previously to produce a membrane-associated tyramine oxidase (TynA) that did not act on 2-phenylethylamine. Subsequently, a gene cloned from K. aerogenes W70 produced a soluble amine oxidase (MaoA) that acted readily on 2-phenylethylamine and tyramine. This enzyme appeared to be equivalent to a 2-phenylethylamine oxidase of Escherichia coli K-12 (MaoA) but was assumed to be the originally described K. aerogenes W70 tyramine oxidase (TynA). However, as described here, whole cells and cell-free extracts of K. aerogenes W70 showed only the tyramine oxidase (TynA) that is inactive against 2-phenylethylamine and not the maoA gene product. It seems that the organism has two amine oxidase genes, tynA and maoA, but only tynA is expressed. Hence, data relating to the expression of the K. aerogenes W70 tynA gene cannot be assumed to apply to the maoA gene of E. coli K-12 because they encode different enzymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1997.tb10175.x
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  • 4
    Electronic Resource
    Electronic Resource
    Experimental observations of high-energy electron degradation in argon (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 6385-6389 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Pulse radiolysis and emission spectroscopy techniques have been used to examine the production of the 2p1 state of Ar and the 4p 2P1/2 and 4p 2D5/2 states of Ar+ at gas pressures below 1 Torr. The rate of formation of these states has been compared with the results from calculations using the time-dependent Spencer–Fano theory of high-energy electron degradation. It is found that the theory successfully predicts the time scale of events in pulse-irradiated argon gas. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.473628
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    Paper (German National Licenses)
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