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Abstract Ribonuclease P, the ubiquitous endonuclease required for generating mature tRNA 5 ends, is a ribonucleoprotein in most organisms and organelles, with the exception of mitochondria and chloroplasts of multicellular organisms. The cyanelle of the primitive alga Cyanophora paradoxa is the...
Abstract Human Tear Lipocalin/von Ebners gland protein (TL) is a member of the lipocalin superfamily. The protein is secreted by a number of serous glands and tissues and is overproduced under conditions of stress, infection and inflammation. In addition to its typical affinity for lipophilic...
Abstract A serine endopeptidase with a molecular mass of 25 kDa has been purified from the culture filtrate of Trichoderma viride to electrophoretic homogeneity. The isoelectric point was determined at 7.3. Two carboxyl sites at Arg22 and Lys29 of the oxidized insulin Bchain were cleaved, and...
Abstract Two ferredoxin genes, fdA and fdB, from the extremely thermoacidophilic crenarchaeon Acidianus ambivalens have been sequenced; the sequences share 86% similarity. Whereas the deduced protein sequence of the ferredoxin FdA clearly contains a zincbinding motif, the corresponding sequence...
Abstract tRNA CCAtermini are generated and maintained by tRNA nucleotidyltransferases. Together with poly(A) polymerases and other enzymes they belong to the nucleotidyltransferase superfamily. However, sequence alignments within this family do not allow to distinguish between CCAadding enzymes...
Abstract In monolayer cultures human rheumatoid synovial fibroblasts (HRSF) secrete gelatinase A (MMP-2) and, unlike other human fibroblasts, to a minor extent also gelatinase B (MMP-9) as inactive proenzymes. In this regard HRSF resemble the fibrosarcoma cell line HT-1080. Unlike HT-1080,...
Abstract Bradykinin released by the endothelium is thought to play an important local role in cardiovascular regulation. However, the molecular identity of endothelial proteases liberating bradykinin from its precursors remained unclear. Using RTPCR and Southern blotting techniques we detected...
Abstract The brainspecific GDP/GTP exchange factor collybistin interacts with the receptoranchoring protein gephyrin and activates the Rholike GTPase Cdc42, which is known to regulate actin cytoskeleton dynamics. Alternative splicing creates two collybistin variants, I and II. In coexpression...
Abstract In this study we show that activation of p38MAPKby IL-6 acts as an inhibitory signal on IL-6-mediated activation of STAT and the α2-macroglobulin promoter. We analyzed the role of MKK6/p38MAPKfor IL-6 signal transduction and transcriptional activation of the suppressor of cytokine...
Abstract New analogs of dUMP, dTMP and 5-fluorodUMP, including the corresponding 5thiophosphates (dUMPS, dTMPS and FdUMPS), 5dithiophosphates (dUMPS2, dTMPS2 and FdUMPS2), 5Hphospho nates (dUMPH, dTMPH and FdUMPH) and 5S thiosulfates (dUSSO3, dTSSO3 and FdUSSO3), have been synthesized and their...
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