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Nuclear pore complexes form immobile networks and have a very low turnover in live mammalian cells
European Molecular Biology Laboratory (EMBL), Heidelberg, Germany.
European Molecular Biology Laboratory (EMBL), Heidelberg, Germany.
NIH Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD), National Institutes of Health (NIH) - USA.
Södertörns högskola, Avdelning Naturvetenskap.
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2001 (Engelska)Ingår i: Journal of Cell Biology, ISSN 0021-9525, E-ISSN 1540-8140, Vol. 154, nr 1, s. 71-84Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The nuclear pore complex (NPC) and its relationship to the nuclear envelope (NE) was characterized in living cells using POM121-green fluorescent protein (GFP) and GFP-Nup153, and GFP-lamin B1. No independent movement of single pore complexes was found within the plane of the NE in interphase. Only large arrays of NPCs moved slowly and synchronously during global changes in nuclear shape, strongly suggesting mechanical connections which form an NPC network. The nuclear lamina exhibited identical movements. NPC turnover measured by fluorescence recovery after photobleaching of POM121 was less than once per cell cycle. Nup153 association with NPCs was dynamic and turnover of this nucleoporin was three orders of magnitude faster. Overexpression of both nucleoporins induced the formation of annulate lamellae (AL) in the endoplasmic reticulum (ER). Turnover of AL pore complexes was much higher than in the NE (once every 2.5 min). During mitosis, POM121 and Nup153 were completely dispersed and mobile in the ER (POM121) or cytosol (Nup153) in metaphase, and rapidly redistributed to an immobilized pool around chromatin in late anaphase. Assembly and immobilization of both nucleoporins occurred before detectable recruitment of lamin B1, which is thus unlikely to mediate initiation of NPC assembly at the end of mitosis.

Ort, förlag, år, upplaga, sidor
2001. Vol. 154, nr 1, s. 71-84
Nationell ämneskategori
Cellbiologi
Identifikatorer
URN: urn:nbn:se:sh:diva-15852DOI: 10.1083/jcb.200101089ISI: 000169845900013PubMedID: 11448991Scopus ID: 2-s2.0-0035833254OAI: oai:DiVA.org:sh-15852DiVA, id: diva2:509030
Tillgänglig från: 2012-03-12 Skapad: 2012-03-09 Senast uppdaterad: 2017-07-20Bibliografiskt granskad
Ingår i avhandling
1. Distribution and dynamics of a nuclear pore membrane protein
Öppna denna publikation i ny flik eller fönster >>Distribution and dynamics of a nuclear pore membrane protein
2002 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Ort, förlag, år, upplaga, sidor
Stockholm: Stockholms universitet, 2002. s. 42
Nyckelord
Proteiner
Nationell ämneskategori
Biologiska vetenskaper
Identifikatorer
urn:nbn:se:sh:diva-31517 (URN)91-7265-391-4 (ISBN)
Disputation
2002-02-08, Magnélisalen, Kemiska Övningslaboratoriet, Svante Arrheniusväg 12, Stockholm, 10:00
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Handledare
Tillgänglig från: 2016-12-22 Skapad: 2016-12-22 Senast uppdaterad: 2016-12-22Bibliografiskt granskad

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Imreh, GabrielaHallberg, Einar

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