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  • Yeast  (2)
  • infrared  (2)
  • Crystal structure
  • Iron
  • 2000-2004  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Crystal structure and spectroscopy of the low-spin iron(II) compound: tris(bipyrimidine)iron(II) bis(triflate), [Fe(bipym)33](CF3SO3)2 (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 441-444 
    Details
    ISSN: 1572-8854
    Keywords: 2,2′-Bipyrimidine ; low-spin ; iron ; crystal structure ; infrared
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The compound [Fe(bipym)33](CF3SO3)2 (in which bipym = 2,2′-bipyrimidine) crystallizes in the space group P21/c, with a = 13.7641(11), b = 18.7557(19), c = 12.3627(11) Å, β = 103.085(8)° and Z = 4. The low-spin Fe(II) atom is octahedrally surrounded by six nitrogen atoms of three bipyrimidine groups with Fe—N distances that vary from 1.968(4) to 1.975(4) å. In the far-infrared region the Fe—N vibrations are observed at 359 and 372 cm-1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1011339214337
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis, spectroscopy, and X-ray structure of the polymer catena-[bis(azido-N)-copper(II)-μ-bis(2-benzimidazolyl)butane] (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 69-72 
    Details
    ISSN: 1572-8854
    Keywords: azido ; crystal structure ; copper(II) ; infrared ; polymeric
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The title compound, catena-[bis(azido-N)-copper(II)-μ(bis(2-benzimidazolyl)butane), [Cu(C18H18N4)(N3)2]n, was obtained from the reaction of the ligand bis(2-benzimidazolyl)butane and Cu(N3)2. The x-ray crystal structure is reported. The compound crystallizes in the monoclinic space group P21/c with a = 8.2524(10), b = 12.765(5), c = 9.1125(15) Å, β = 106.423(12)°, Z = 2. The Cu(II) ions are square-planar coordinated with trans-oriented end-on binding azido ligands. The structure is a polynuclear chain with the benzimidazole bridging at each end. In addition a N(ligand)-H···N(azido) H-bridge [N(ligand)···N(azido) = 2.994(7) Å] is present, resulting in a pseudo 2-dimensional lattice. The characteristic azido infrared vibrations are found at 2060 and 2077 cm−1 (νas(N3)) and 1284 and 1297 cm−1 (ν(N3)).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009506418398
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  • 3
    Electronic Resource
    Electronic Resource
    Mss51p, a putative translational activator of cytochrome c oxidase subunit-1 (COX1) mRNA, is required for synthesis of Cox1p in Saccharomyces cerevisiae (2000)
    Springer
    Current genetics 37 (2000), S. 213-220 
    Details
    ISSN: 1432-0983
    Keywords: Key words MSS51 ; Mitochondrial translation ; Yeast ; Cytochrome c oxidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Mutants of Saccharomyces cerevisiae that lack a functional MSS51 gene are respiratory deficient due to the absence of cytochrome c oxidase subunit 1 (Cox1p). It has been previously suggested, but not formally proven, that Mss51p is required for translational activation of COX1 mRNA, rather than being involved in a subsequent step in the synthesis of Cox1p or its assembly into cytochrome c oxidase. Pulse-chase labelling experiments now show that the absence of detectable levels of Cox1p in mss51-null strains is indeed due to the lack of synthesis of Cox1p, and is not caused by reduced stability of the protein. To gain more insight into the exact function of Mss51p, we determined the subcellular localization of the protein. We were able to show that an epitope-tagged version of Mss51p (Mss51HA) complements the mutation and can be localized in mitochondria, where it is firmly associated with the mitochondrial inner membrane. In addition, we characterized the previously identified mutant allele mss51-3. Sequence analysis revealed the presence of a short open reading frame upstream of MSS51 resulting from the creation of an extra ATG startcodon.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002940050522
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  • 4
    Electronic Resource
    Electronic Resource
    Isolation and RNA-binding analysis of NAD+-isocitrate dehydrogenases from Kluyveromyces lactis and Schizosaccharomyces pombe (2000)
    Springer
    Current genetics 38 (2000), S. 87-94 
    Details
    ISSN: 1432-0983
    Keywords: Key words Mitochondrial translation ; RNA binding ; Isocitrate dehydrogenase ; Yeast
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Krebs cycle NAD+-isocitrate dehydrogenase (Idh) binds to the 5-UTRs of all mitochondrial mRNAs in Saccharomyces cerevisiae. We hypothesize that this leader-binding activity plays a role in translational regulation, thereby linking mitochondrial biogenesis to the need for respiratory function. Analysis of effects of leader binding on mitochondrial translation is complicated by the involvement of the enzyme in mitochondrial metabolism. We have therefore searched for an Idh altered in RNA binding, but retaining full enzyme activity. Idh from Kluyveromyces lactis and Schizosaccharomyces pombe was partially purified and examined for the ability to bind Cox2 mRNA. Sch. pombe Idh, like the S. cerevisiae enzyme, has high affinity for both its own, K. lactis and S. cerevisiaeCOX2 leaders. In contrast, Idh purified from K. lactis shows only low affinity for all mRNAs tested. To determine what distinguishes K. lactis Idh from S. cerevisiae Idh, genes encoding the two subunits of Idh in K. lactis were cloned and sequenced. Sequence comparison revealed high levels of similarity throughout the proteins, in particular in regions involved in enzyme activity, co-factor and regulator binding. Non-conserved residues between the subunits from the two yeasts are candidates for involvement in the interaction with RNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002940000132
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