Positioning of chromosomes in human spermatozoa is determined by ordered centromere arrangement.
Positioning of chromosomes in human spermatozoa is determined by ordered centromere arrangement.
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DOI:
10.1371/journal.pone.0052944
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Zalensky AO
中科院分区:
文献类型:
--
作者:
Mudrak OS;Nazarov IB;Jones EL;Zalensky AO
The intranuclear positioning of chromosomes (CHRs) is a well-documented fact; however, mechanisms directing such ordering remain unclear. Unlike somatic cells, human spermatozoa contain distinct spatial markers and have asymmetric nuclei which make them a unique model for localizing CHR territories and matching peri-centromere domains. In this study, we established statistically preferential longitudinal and lateral positioning for eight CHRs. Both parameters demonstrated a correlation with the CHR gene densities but not with their sizes. Intranuclear non-random positioning of the CHRs was found to be driven by a specific linear order of centromeres physically interconnected in continuous arrays. In diploid spermatozoa, linear order of peri-centromeres was identical in two genome sets and essentially matched the arrangement established for haploid cells. We propose that the non-random longitudinal order of CHRs in human spermatozoa is generated during meiotic stages of spermatogenesis. The specific arrangement of sperm CHRs may serve as an epigenetic basis for differential transcription/replication and direct spatial CHR organization during early embryogenesis.
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DOI:
10.1083/jcb.145.6.1119
发表时间:
1999-06-14
期刊:
The Journal of cell biology
影响因子:
--
作者:
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通讯作者:
Bickmore WA
DOI:
10.1083/jcb.200607054
发表时间:
2007-02-26
期刊:
The Journal of cell biology
影响因子:
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作者:
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通讯作者:
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影响因子:
2.5
作者:
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通讯作者:
Bartoov, B
影响因子:
3.7
作者:
HAAF, T;WARD, DC
通讯作者:
WARD, DC
影响因子:
3.7
作者:
HAAF, T;GRUNENBERG, H;SCHMID, M
通讯作者:
SCHMID, M