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  • 1
    Electronic Resource
    Electronic Resource
    Phylogenetic analysis of the stress-70 protein family (1994)
    Springer
    Journal of molecular evolution 39 (1994), S. 80-86 
    Details
    ISSN: 1432-1432
    Keywords: Heat-shock proteins ; HSP70 ; Stress-70 ; Phylogenetic trees ; Protein families ; NLS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The eukaryotic cyto-/nucleoplasmatic 70-kDa heat-shock protein (HSP70) has homologues in the endoplasmic reticulum as well as in bacteria, mitochondria, and plastids. We selected a representative subset from the large number of sequenced stress-70 family members which covers all known branches of the protein family and calculated and manually improved an alignment. Here we present the consensus sequence of the aligned proteins and putative nuclear localization signals (NLS) in the eukaryotic HSP70 homologues. The phylogenetic relationships of the stress-70 group family members were estimated by use of different computation methods. We present a phylogenetic tree containing all known stress-70 subfamilies and demonstrate the usefulness of stress-70 protein sequences for the estimation of intertaxonic phylogeny.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00178252
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Phylogenetic relationships of HMG box DNA-binding domains (1993)
    Springer
    Journal of molecular evolution 37 (1993), S. 204-210 
    Details
    ISSN: 1432-1432
    Keywords: HMG box ; DNA-binding proteins ; High-mobility-group (HMG) proteins ; Phylogenetic trees ; Nuclear targeting sequences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract HMG boxes were initially identified as DNA-binding domains of the human RNA polymerase I (pol I) transcription factor hUBF and the animal high-mobility-group (HMG) protein family HMG1. Since then, numerous sequences of HMG-box-containing HMG proteins and other DNA-binding proteins from several species have become available. By sequence comparisons of a selected range of HMG boxes from these proteins and the construction of phylogenetic trees we show that the HMG box is highly conserved between DNA-binding proteins of organisms from all three eukaryotic kingdoms and that HMG boxes are linked by distinct evolutionary relationships. In addition, most HMG boxes display comparable hydropathy profiles and amino acid arrangements, which could serve as nuclear targeting sequences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02407357
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The presence of a nucleomorph hsp70 gene is a common feature of Cryptophyta and Chlorarachniophyta (1994)
    Springer
    Current genetics 26 (1994), S. 451-455 
    Details
    ISSN: 1432-0983
    Keywords: Chlorarachniophyta ; Cryptophyta ; Nucleomorph ; HSP 70
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cryptomonad algae and Chlorarachiniophyta are evolutionary chimaeras derived from the engulfment of an eukaryotic phototrophic endosymbiont by a eukaryotic host cell. Although much reduced, the endosymbiont's eukaryotic plasmatic compartment still contains a nucleus, the so-called nucleomorph. These nucleomorphs carry the smallest known eukaryotic genomes. We have characterized the genomes of several cryptomonads and a Chlorarachnion species by means of PFGE (pulsed-field gel electrophoresis). Hybridization studies with small subunit rDNA were used to identify the nucleomorph chromosomes. We also performed hybridization experiments with an hsp70 probe to estimate the distribution of this gene among the different algal species. The evolutionary, genetical, and physiological implications of our studies are discussed. A model on the possible function of the nucleomorph hsp70 gene products is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309933
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  • 4
    Electronic Resource
    Electronic Resource
    The smallest known eukaryotic genomes encode a protein gene: towards an understanding of nucleomorph functions (1994)
    Springer
    Molecular genetics and genomics 243 (1994), S. 600-604 
    Details
    ISSN: 1617-4623
    Keywords: Cryptomonads ; Periplastidal ; Hsp70 ; Transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cryptomonads are unicellular algae with plastids surrounded by four membranes. Between the two pairs of membranes lies a periplastidal compartment that harbours a DNA-containing organelle, termed the nucleomorph. The nucleomorph is the vestigial nucleus of a phototrophic, eukaryotic endosymbiont. Subcloning of parts of one nucleomorph chromosome revealed a gene coding for an Hsp70 protein. We demonstrate the expression of this nucleomorph protein-coding gene and present a model for protein transport from the host to the endosymbiont compartment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284209
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    Paper (German National Licenses)
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