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  • 1
    Digitale Medien
    Digitale Medien
    Synthesis of Hemolymph High-Density Lipoprotein β-Glucan Binding Protein by Penaeus vannamei Shrimp Hepatopancreas (2000)
    Springer
    Marine biotechnology 2 (2000), S. 485-492 
    Details
    ISSN: 1436-2236
    Schlagwort(e): Key words:β-glucan binding protein, hepatopancreas, high-density lipoprotein, Penaeus vannamei, shrimp
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Abstract: It was recently shown that the shrimp high-density lipoprotein (HDL) and the β-1,3-glucan binding protein (BGBP) are identical, implying dual functions for the same protein: lipid transport and involvement in the defense system. Because this protein is present in plasma, and the hepatopancreas is a major lipid storage gland, we investigated the presence of the HDL/BGBP polypeptide and its messenger RNA in this tissue using a monospecific antibody against HDL/BGBP. Hepatopancreas crude protein extracts, as well as polypeptides produced by poly(A)+ RNA in vitro translation, were recognized by the anti-HDL/BGBP. Furthermore, a specific pattern was revealed in hepatopancreas thin sections by immunodetection. Strong recognition was seen in the epithelial cells of hepatopancreatic tubules, probably related to the secretion process of this protein.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s101260000030
    Standort Signatur Einschränkungen Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 2
    Digitale Medien
    Digitale Medien
    Intercistronic group III introns in polycistronic ribosomal protein operons of chloroplasts (1991)
    Springer
    Molecular genetics and genomics 228 (1991), S. 183-192 
    Details
    ISSN: 1617-4623
    Schlagwort(e): Euglena gracilis ; Chloroplast ; Intercistronic ; Intron ; Ribosomal protein
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary A novel ribosomal protein operon in the Euglena gracilis chloroplast genome was characterized. It encodes the genes for ribosomal proteins S4 and S11 (rps4 and rps11). The coding region of the rps11 gene is interrupted by two introns of 107 and 100 bp. The introns belong to a distinct class known as group III introns. The major transcript from this operon was characterized as a fully spliced dicistronic rps4-rps11 mRNA by RNA blot analysis, primer extension sequencing, and cDNA cloning and sequencing. An additional 95 nucleotide (nt) group III intron was identified in the 123 nt rps4-rps11 intercistronic region. The identification of the intercistronic intron between the rps4 and rps11 genes was unexpected. Other RNA transcripts from regions of the genome that could potentially contain intercistronic introns were re-examined and two other intercistronic, group III introns were found. These are located in a large ribosomal protein operon between the genes for the ribosomal proteins L23 and L2, and between L14 and L5. There are at least 50 group III introns in the E. gracilis chloroplast genome. All but 6 are found in genes encoding protein components of the transcriptional and translational apparatus. The distribution of group III introns and the unusual location of intercistronic group III introns may reflect some aspect of gene expression, or provide some insight into the mechanism of their splicing.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00282464
    Standort Signatur Einschränkungen Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 3
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    Twenty years of the ‘Preparation for Oxidative Stress’ (POS) theory: Ecophysiological advantages and molecular strategies (2019)
    In:  EPIC3Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 234, pp. 36-49, ISSN: 10956433
    Details
    Publikationsdatum: 2019-10-10
    Beschreibung: Freezing, dehydration, salinity variations, hypoxia or anoxia are some of the environmental constraints that many organisms must frequently endure. Organisms adapted to these stressors often reduce their metabolic rates to maximize their chances of survival. However, upon recovery of environmental conditions and basal metabolic rates, cells are affected by an oxidative burst that, if uncontrolled, leads to (oxidative) cell damage and eventually death. Thus, a number of adapted organisms are able to increase their antioxidant defenses during an environmental/functional hypoxic transgression; a strategy that was interpreted in the 1990s as a "preparation for oxidative stress" (POS). Since that time, POS mechanisms have been identified in at least 83 animal species representing different phyla including Cnidaria, Nematoda, Annelida, Tardigrada, Echinodermata, Arthropoda, Mollusca and Chordata. Coinciding with the 20th anniversary of the postulation of the POS hypothesis, we compiled this review where we analyze a selection of examples of species showing POS-mechanisms and review the most recent advances in understanding the underlying molecular mechanisms behind those strategies that allow animals to survive in harsh environments.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Standort Signatur Einschränkungen Verfügbarkeit
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