PMID- 34359988 OWN - NLM STAT- MEDLINE DCOM- 20211026 LR - 20211026 IS - 2073-4409 (Electronic) IS - 2073-4409 (Linking) VI - 10 IP - 7 DP - 2021 Jul 19 TI - New Data on Organization and Spatial Localization of B-Chromosomes in Cell Nuclei of the Yellow-Necked Mouse Apodemus flavicollis. LID - 10.3390/cells10071819 [doi] LID - 1819 AB - The gene composition, function and evolution of B-chromosomes (Bs) have been actively discussed in recent years. However, the additional genomic elements are still enigmatic. One of Bs mysteries is their spatial organization in the interphase nucleus. It is known that heterochromatic compartments are not randomly localized in a nucleus. The purpose of this work was to study the organization and three-dimensional spatial arrangement of Bs in the interphase nucleus. Using microdissection of Bs and autosome centromeric heterochromatic regions of the yellow-necked mouse (Apodemus flavicollis) we obtained DNA probes for further two-dimensional (2D)- and three-dimensional (3D)- fluorescence in situ hybridization (FISH) studies. Simultaneous in situ hybridization of obtained here B-specific DNA probes and autosomal C-positive pericentromeric region-specific probes further corroborated the previously stated hypothesis about the pseudoautosomal origin of the additional chromosomes of this species. Analysis of the spatial organization of the Bs demonstrated the peripheral location of B-specific chromatin within the interphase nucleus and feasible contact with the nuclear envelope (similarly to pericentromeric regions of autosomes and sex chromosomes). It is assumed that such interaction is essential for the regulation of nuclear architecture. It also points out that Bs may follow the same mechanism as sex chromosomes to avoid a meiotic checkpoint. FAU - Karamysheva, Tatyana AU - Karamysheva T AUID- ORCID: 0000-0002-5140-4350 AD - Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia. FAU - Romanenko, Svetlana AU - Romanenko S AUID- ORCID: 0000-0002-0951-5209 AD - Institute of Molecular and Cellular Biology, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia. FAU - Makunin, Alexey AU - Makunin A AUID- ORCID: 0000-0002-9555-5097 AD - Wellcome Sanger Institute, Cambridge CB10 1SA, UK. FAU - Rajicic, Marija AU - Rajicic M AUID- ORCID: 0000-0002-2470-9888 AD - Institute for Biological Research "Sinisa Stankovic", National Institute of Republic of Serbia, 11060 Belgrade, Serbia. FAU - Bogdanov, Alexey AU - Bogdanov A AUID- ORCID: 0000-0002-2106-3989 AD - Koltzov Institute of Developmental Biology, Russian Academy of Sciences, 119991 Moscow, Russia. FAU - Trifonov, Vladimir AU - Trifonov V AUID- ORCID: 0000-0003-0454-8359 AD - Institute of Molecular and Cellular Biology, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia. AD - Department of Genetic Technologies, Novosibirsk State University, 630090 Novosibirsk, Russia. FAU - Blagojevic, Jelena AU - Blagojevic J AUID- ORCID: 0000-0001-7102-5510 AD - Institute for Biological Research "Sinisa Stankovic", National Institute of Republic of Serbia, 11060 Belgrade, Serbia. FAU - Vujosevic, Mladen AU - Vujosevic M AUID- ORCID: 0000-0002-5577-4455 AD - Institute for Biological Research "Sinisa Stankovic", National Institute of Republic of Serbia, 11060 Belgrade, Serbia. FAU - Orishchenko, Konstantin AU - Orishchenko K AUID- ORCID: 0000-0001-9718-9038 AD - Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia. AD - Department of Genetic Technologies, Novosibirsk State University, 630090 Novosibirsk, Russia. FAU - Rubtsov, Nikolay AU - Rubtsov N AUID- ORCID: 0000-0001-7406-8057 AD - Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia. AD - Department of Genetic Technologies, Novosibirsk State University, 630090 Novosibirsk, Russia. LA - eng GR - 19-015-00084small a, Cyrillic/Russian Foundation for Basic Research/ GR - 0259-2021-0011/the State Budget of ICG and by the Ministry of Science and Higher Education of the Russian Federation via IC&G SB RAS/ GR - 0088-2021-0019/Government basic research program/ GR - 2019-0546 (FSUS-2020-0040)/the Ministry of Science and Higher Education of the Russian Federation via the Novosibirsk State University/ GR - 206194/WT_/Wellcome Trust/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210719 PL - Switzerland TA - Cells JT - Cells JID - 101600052 RN - 9007-49-2 (DNA) SB - IM MH - Animals MH - Bone Marrow Cells/metabolism MH - Cell Nucleus/*genetics MH - Centromere/genetics MH - Chromosome Painting MH - Chromosomes, Mammalian/*genetics MH - DNA/genetics MH - Fibroblasts/metabolism MH - Humans MH - In Situ Hybridization, Fluorescence MH - Interphase MH - Metaphase/genetics MH - Murinae/*genetics PMC - PMC8305704 OTO - NOTNLM OT - 3D genome organization OT - B-chromosomes (Bs) OT - chromosome territories (CT) OT - confocal microscopy OT - duplication clusters OT - microdissection OT - repetitive DNA OT - speciation COIS- All authors have no conflict of interest to declare. EDAT- 2021/08/08 06:00 MHDA- 2021/10/27 06:00 PMCR- 2021/07/19 CRDT- 2021/08/07 01:04 PHST- 2021/06/29 00:00 [received] PHST- 2021/07/13 00:00 [revised] PHST- 2021/07/14 00:00 [accepted] PHST- 2021/08/07 01:04 [entrez] PHST- 2021/08/08 06:00 [pubmed] PHST- 2021/10/27 06:00 [medline] PHST- 2021/07/19 00:00 [pmc-release] AID - cells10071819 [pii] AID - cells-10-01819 [pii] AID - 10.3390/cells10071819 [doi] PST - epublish SO - Cells. 2021 Jul 19;10(7):1819. doi: 10.3390/cells10071819.