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Mre11-Rad50 (MR) proteins are encoded by bacteriophage, eubacterial, archeabacterial and eukaryotic genomes, and form a complex with a remarkable protein architecture. This complex is capable of tethering the ends of DNA molecules, possesses a variety of DNA nuclease, helicase, ATPase and annealing activities, and performs a wide range of functions within cells. It is required for meiotic recombination, double-strand break repair, processing of mis-folded DNA structures and maintaining telomere length. This article reviews current knowledge of the structure and enzymatic activities of the MR complex and attempts to integrate biochemical information with the roles of the protein in a cell.
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http://dx.doi.org/10.1016/s0968-0004(02)02144-8 | DOI Listing |
J Orthop Res
February 2025
Department of Mechanical and Biomedical Engineering, Boise State University, Boise, Idaho, USA.
Vertebral body tethering (VBT) uses a flexible tether affixed across the curve convexity with tension applied at each segment to treat scoliosis. Intraoperative tether tension may be achieved directly with a counter-tensioner or with an extension spring tube. The purpose of this study was to quantify the force generated with and without the extension spring tube using current FDA-approved VBT instrumentation, to understand the variation between surgeons using the same instrumentation, and to define the force range that is generated intra-operatively.
View Article and Find Full Text PDFSpine J
December 2018
Department of Orthopaedic Surgery, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands. Electronic address:
Background Context: One of the characteristics of reported observations in adolescent idiopathic scoliosis (AIS) is that the thoracic spine is longer anteriorly than posteriorly, more pronounced around the apex than the transitional zones. This reversal of the normal kyphotic anatomy of the thoracic spine is related to questions of etiopathogenesis of AIS. The changes in the anatomy of the anterior column have been described rather in detail; however, the role of the posterior spinal column and the laminae has so far not been elucidated.
View Article and Find Full Text PDFNat Commun
February 2018
Section Cell Biology, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.
Recycling endosomes maintain plasma membrane homeostasis and are important for cell polarity, migration, and cytokinesis. Yet, the molecular machineries that drive endocytic recycling remain largely unclear. The CORVET complex is a multi-subunit tether required for fusion between early endosomes.
View Article and Find Full Text PDFTraffic
December 2015
Department of Cell Biology and Institute of Biomembranes, Center for Molecular Medicine, University Medical Center Utrecht, Heidelberglaan 100, 3584CX, Utrecht, The Netherlands.
Lysosomes are the main degradative compartments of eukaryotic cells. The CORVET and HOPS tethering complexes are well known for their role in membrane fusion in the yeast endocytic pathway. Yeast Vps33p is part of both complexes, and has two mammalian homologues: Vps33A and Vps33B.
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February 2013
Department of Cell Biology, University Medical Center Utrecht, Heidelberglaan 100, 3584, CX Utrecht, The Netherlands.
The homotypic fusion and protein sorting (HOPS) complex is a multisubunit tethering complex that in yeast regulates membrane fusion events with the vacuole, the yeast lysosome. Mammalian homologs of all HOPS components have been found, but little is known about their function. Here, we studied the role of hVps41 and hVps39, two components of the putative human HOPS complex, in the endo-lysosomal pathway of human cells.
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