Alexander M. Ishov

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Nuclear domain 10 (ND10), also referred to as nuclear bodies, are discrete interchromosomal accumulations of several proteins including promyelocytic leukemia protein (PML) and Sp100. In this study, we investigated the mechanism of ND10 assembly by identifying proteins that are essential for this process using cells lines that lack individual(More)
After DNA viruses enter the nucleus, they initiate a transcriptional cascade which is followed by replication. We investigated whether these processes take place at specific nuclear sites or, as suggested by the mode of entry, randomly throughout the nucleus. Three distinct nuclear domains, nuclear factor-1 sites, coiled bodies, and nuclear domain 10(More)
The development of an induced transcript environment was investigated at the supramolecular level through comparative localization of the human cytomegalovirus immediate early (IE) transcripts and specific nuclear domains shortly after infection. Compact aggregates of IE transcripts form only adjacent to nuclear domain 10 (ND10), and the viral protein IE86(More)
BACKGROUND Functional and morphological studies of tandem DNA repeats, that combine high portion of most genomes, are mostly limited due to the incomplete characterization of these genome elements. We report here a genome wide analysis of the large tandem repeats (TR) found in the mouse genome assemblies. RESULTS Using a bioinformatics approach, we(More)
Current theories suggest that mitotic checkpoint proteins are essential for proper cellular response to taxanes, a widely used family of chemotherapeutic compounds. We recently showed that absence or depletion of protein Daxx increases cellular taxol (paclitaxel) resistance-a common trait of patients diagnosed with several malignancies, including breast(More)
A large number of patients are resistant to taxane-based chemotherapy. Functional mitotic checkpoints are essential for taxane sensitivity. Thus, mitotic regulators are potential markers for therapy response and could be targeted for anticancer therapy. In this study, we identified a novel function of ubiquitin (Ub)-specific processing protease-7 (USP7)(More)
USP7 (Ubiquitin Specific processing Protease-7) is a deubiquitinase which, over the past decade emerged as a critical regulator of cellular processes. Deregulation of USP7 activity has been linked to cancer, making USP7 inhibition an appealing anti-cancer strategy. The identification of novel USP7 substrates and additional USP7-dependent cellular activities(More)
The death domain-associated protein (DAXX) collaborates with accessory proteins to deposit the histone variant H3.3 into mouse telomeric and pericentromeric repeat DNA. Pericentromeric repeats are the main genetic contributor to spatially discrete, compact, constitutive heterochromatic structures called chromocentres. Chromocentres are enriched in the(More)
Nuclear domains 10 (ND10) were first detected occasionally using antibodies to an antigen of unknown nature (Ascoli, Maul, 1991). Further on it was shown that ND10 were sites of locality of the number of proteins (PML, Sp 100, pRB) (Sterndorf et al., 1992; Kamitani et al., 1998), the majority of which are modified with ubiquitin-like small(More)