Abstract:
BACKGROUND INFORMATION:Nucleolin is a major nucleolar protein which is highly expressed in rapidly dividing cells and cancer cell lines. This protein is claimed to be multifunctional and could play a role in rRNA (ribosomal RNA) synthesis, as well as in cell division or response to cellular stresses. Therefore, how nucleolin influences cell proliferation remained elusive so far. RESULTS:We have generated conditional nucleolin-knockout cells using the chicken B lymphocyte cell line DT40. Our results indicate that nucleolin is absolutely required for the proliferation and for the survival of these cells. Depletion of nucleolin drastically inhibits rDNA (ribosomal DNA) transcription while only slightly affecting pre-rRNA processing. This inhibition is accompanied by modifications of the shape and the structure of the nucleolus. The analysis of mutants of nucleolin, which lack two or three RNA-binding domains, shows that these domains harbour redundant functions and that nucleolin's roles in transcription, rRNA maturation and nucleolar shape can be partially uncoupled. CONCLUSIONS:The function of nucleolin in ribosomal synthesis could account for its effect on cell division and survival, but this vital role does not seem to be linked to sequence-specific RNA binding.
journal_name
Biol Celljournal_title
Biology of the cellauthors
Storck S,Thiry M,Bouvet Pdoi
10.1042/BC20080054subject
Has Abstractpub_date
2009-03-01 00:00:00pages
153-67issue
3eissn
0248-4900issn
1768-322Xpii
BC20080054journal_volume
101pub_type
杂志文章abstract::A quantitative ultrastructural study was performed on 56 ejaculates showing anomalies of the sperm axonemal complex. The anomalies comprised either the absence of one, or more often several, axonemal structures, or defective elongation of the doublets. Several characteristics relating to the extent and superimposition...
journal_title:Biology of the cell
pub_type: 杂志文章
doi:10.1111/j.1768-322x.1984.tb00253.x
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journal_title:Biology of the cell
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journal_title:Biology of the cell
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journal_title:Biology of the cell
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journal_title:Biology of the cell
pub_type: 杂志文章
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更新日期:2006-08-01 00:00:00
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journal_title:Biology of the cell
pub_type: 历史文章,杂志文章,评审
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journal_title:Biology of the cell
pub_type: 杂志文章
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journal_title:Biology of the cell
pub_type: 杂志文章
doi:
更新日期:1997-08-01 00:00:00
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journal_title:Biology of the cell
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journal_title:Biology of the cell
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更新日期:2013-10-01 00:00:00
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journal_title:Biology of the cell
pub_type: 杂志文章
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更新日期:1989-01-01 00:00:00
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journal_title:Biology of the cell
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更新日期:1998-11-01 00:00:00
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journal_title:Biology of the cell
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更新日期:2011-08-01 00:00:00
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journal_title:Biology of the cell
pub_type: 杂志文章,评审
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journal_title:Biology of the cell
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journal_title:Biology of the cell
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更新日期:2010-12-01 00:00:00
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更新日期:2009-09-14 00:00:00
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journal_title:Biology of the cell
pub_type: 杂志文章,评审
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更新日期:2017-03-01 00:00:00
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journal_title:Biology of the cell
pub_type: 杂志文章
doi:10.1111/j.1768-322x.1985.tb00374.x
更新日期:1985-01-01 00:00:00
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journal_title:Biology of the cell
pub_type: 杂志文章
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更新日期:1997-05-01 00:00:00