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Mechanistic studies of ATP-dependent proteolysis demonstrate that substrate unfolding is a prerequisite for processive peptide bond hydrolysis. We show that mitochondrial Lon also degrades folded proteins and initiates substrate cleavage non-processively. Two mitochondrial substrates with known or homology-derived three-dimensional structures were used: the(More)
We found a new variant of the streptogramin A resistance gene, vga(A)LC, in clinical isolates of Staphylococcus haemolyticus resistant to lincomycin and clindamycin but susceptible to erythromycin and in which no relevant lincosamide resistance gene was detected. The gene vga(A)LC, differing from the gene vga(A) at the protein level by seven amino acid(More)
High occurrence of the non-macrolide-lincosamide-streptogramin B resistance genes msrA (53%) and linA/linA' (30%) was found among 98 methicillin-resistant coagulase-negative staphylococci additionally resistant to macrolides and/or lincosamides. The gene msrA predominated in Staphylococcus haemolyticus (43 of 62 isolates). In Staphylococcus epidermidis, it(More)
PURPOSE OF THE STUDY To analyze our results of screening for developmental dysplasia of the hip (DDH) in the Liberec region between 1984 and 2005 MATERIAL AND METHODS The study comprised 30,010 infants screened for DDH without any primary selection between 1984 and 2005.The infants were clinically examined on the basis of a three-step screening system(More)
In the biosynthesis of lincosamide antibiotics lincomycin and celesticetin, the amino acid and amino sugar units are linked by an amide bond. The respective condensing enzyme lincosamide synthetase (LS) is expected to be an unusual system combining nonribosomal peptide synthetase (NRPS) components with so far unknown amino sugar related activities. The(More)
The LmbB1 protein, participating in the biosynthesis of lincomycin, was heterologously expressed in Escherichia coli, purified in its active form, and characterized as a dimer of identical subunits. Methods for purification and analysis of the LmbB1 reaction product were developed. Molecular mass and fragmentation pattern of the product revealed by(More)
A cosmid bearing an insert of 38 217 bp covering the gene cluster and its flanking regions of type strain Streptomyces lincolnensis ATCC 25466 was sequenced. Two relatively extensive sequence changes and several hundred point mutations were identified if compared with the previously published sequence of the lincomycin (Lin) industrial strain S.(More)
An all atomic, non-restrained molecular dynamics (MD) simulation in explicit water was used to study in detail the structural features of the highly conserved glycine-rich loop (GRL) of the α-subunit of the yeast mitochondrial processing peptidase (MPP) and its importance for the tertiary and quaternary conformation of MPP. Wild-type and GRL-deleted MPP(More)
Acetolactate synthase small subunit encoding ilvN genes from the parental Streptomyces cinnamonensis strain and mutants resistant either to valine analogues or to 2-ketobutyrate were cloned and sequenced. The wild-type IlvN from S. cinnamonensis is composed of 175 amino acid residues and shows a high degree of similarity with the small subunits of other(More)
BACKGROUND Despite improving results, exocrine complications remain a major challenge in clinical pancreas transplantation. The etiology of posttransplantation pancreatitis relates almost certainly to cold ischemia/reperfusion-induced microvascular injury with an imbalance of vasoconstricting and vasodilating mediators due to endothelial dysfunction. We(More)