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Rother MB, Palstra RJ, Jhunjhunwala S, van Kester KAM, van IJcken WFJ, Hendriks RW, van Dongen JJM, Murre C, van Zelm MC. Nuclear positioning rather than contraction controls ordered rearrangements of immunoglobulin loci. Nucleic Acids Res 2016; 44:175-86. [PMID: 26384565 PMCID: PMC4705691 DOI: 10.1093/nar/gkv928] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 09/05/2015] [Accepted: 09/07/2015] [Indexed: 12/31/2022] Open
Abstract
Progenitor-B cells recombine their immunoglobulin (Ig) loci to create unique antigen receptors. Despite a common recombination machinery, the Ig heavy and Ig light chain loci rearrange in a stepwise manner. We studied pre-pro-B cells and Rag(-/-) progenitor-B cells to determine whether Ig locus contraction or nuclear positioning is decisive for stepwise rearrangements. We found that both Ig loci were contracted in pro-B and pre-B cells. Igh relocated from the nuclear lamina to central domains only at the pro-B cell stage, whereas, Igκ remained sequestered at the lamina, and only at the pre-B cell stage located to central nuclear domains. Finally, in vitro induced re-positioning of Ig alleles away from the nuclear periphery increased germline transcription of Ig loci in pre-pro-B cells. Thus, Ig locus contraction juxtaposes genomically distant elements to mediate efficient recombination, however, sequential positioning of Ig loci away from the nuclear periphery determines stage-specific accessibility of Ig loci.
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Affiliation(s)
- Magdalena B Rother
- Department of Immunology, Erasmus MC, University Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Robert-Jan Palstra
- Department of Biochemistry, Erasmus MC, University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Suchit Jhunjhunwala
- Department of Molecular Biology, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0377, USA
| | - Kevin A M van Kester
- Department of Immunology, Erasmus MC, University Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Wilfred F J van IJcken
- Center for Biomics, Erasmus MC, University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Rudi W Hendriks
- Department of Pulmonary Medicine, Erasmus MC, University Medical Center, PO Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Jacques J M van Dongen
- Department of Immunology, Erasmus MC, University Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
| | - Cornelis Murre
- Department of Molecular Biology, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0377, USA
| | - Menno C van Zelm
- Department of Immunology, Erasmus MC, University Medical Center, Wytemaweg 80, 3015 CN Rotterdam, The Netherlands
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