We sequenced the NH2 terminus of the large and small subunits of the periplasmic hydrogenase from the sulfate-reducing bacterium Desulfovibrio vulgaris (Hildenborough) and found that the small subunit lacks a region of 34 NH4-terminal amino acids coded by the gene for the small subunit (G. Voordouw and S. Brenner, Eur. J. Biochem. 148:515-520, 1985). We suggest that this region constitutes a signal peptide based on comparison with known procaryotic signal peptides.
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http://dx.doi.org/10.1128/jb.167.2.722-725.1986 | DOI Listing |
J Agric Food Chem
January 2025
Department of Plant Breeding, Swedish University of Agricultural Sciences, Box 190, Lomma SE-23422, Sweden.
In this study, the impact of the varying environments, wet-cool (2017), dry-hot (2018), and fluctuating (2019), on two spring wheat genotypes, Diskett and Bumble, grown in field conditions in southern Sweden was studied. From harvested grains, polymeric gluten proteins were fractionated and collected using SE-HPLC and then analyzed with LC-MS/MS. Proteins and peptides identified through searches against the protein sequences of (taxon 4565) from the UniProtKB database showed 7 high molecular weight glutenin subunits (HMW-GS) and 24 low molecular weight glutenin subunits (LMW-GS) with different enrichment levels for both genotypes.
View Article and Find Full Text PDFInt J Syst Evol Microbiol
January 2025
National Fungal Culture Collection of India (NFCCI), Biodiversity and Palaeobiology Group, MACS-Agharkar Research Institute, Pune, India.
Yeast strains representing a novel asexual ascomycetous species were isolated from seven flowers. Sequencing of the chromosomal regions coding for the D1/D2 domains of the large subunit ribosomal RNA, the ITS1-5.8S-ITS2 segments and parts of the gene coding for the small subunit ribosomal RNA showed that the isolates were conspecific.
View Article and Find Full Text PDFJ Cell Biol
February 2025
Department of Biochemistry, University of Colorado, Boulder, CO, USA.
Cajal bodies are essential sites for the biogenesis of small nuclear and nucleolar ribonucleoproteins. In this issue, Courvan and Parker discuss new work from Neugebauer and colleagues (https://doi.org/10.
View Article and Find Full Text PDFBackground: Non-invasive biofluid and MRI measures of blood-brain-barrier (BBB) dysfunction may aid early detection of cerebral small vessel disease (cSVD). Plasma markers of astrocytic function and injury, such as S100 calcium-binding protein B (S100b), have gained increased attention in relation to BBB integrity and cognition. Here we explored the inter-relationships between plasma S100b levels, an MRI measure of water exchange rate across the BBB (kw), and cognitive performance among older adults.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of California, San Francisco, San Francisco, CA, USA.
Background: An optimized 6 amino acid peptide (NLSYYT; herein YΦ) derived from the C-terminus of h19S proteasome activator Rpt5 has been shown to activate the 20S proteasome and promote tau degradation. Further analysis of this peptide has identified the highly conserved leucine in position 5 (P5) as a key part of the 20S activation mechanism to drive degradation of tau monomers in the absence of proteasome activator complexes.
Method: Recombinant peptides were used to identify key amino acids required for binding and activating the h20S proteasome.
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