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The arginine methyltransferase Rmt2 specifically associates with FG-nucleoporins – implications for a function in nuclear transport
Stockholms universitet.
Södertörns högskola, Institutionen för livsvetenskaper, Biologi.
(engelsk)Manuskript (preprint) (Annet vitenskapelig)
HSV kategori
Identifikatorer
URN: urn:nbn:se:sh:diva-32041OAI: oai:DiVA.org:sh-32041DiVA, id: diva2:1073762
Merknad

Som manuskript i avhandling. As manuscript in dissertation.

Tilgjengelig fra: 2008-05-08 Laget: 2017-02-13 Sist oppdatert: 2017-02-13bibliografisk kontrollert
Inngår i avhandling
1. Functional studies of nuclear envelope-associated proteins in Saccharomyces cerevisiae
Åpne denne publikasjonen i ny fane eller vindu >>Functional studies of nuclear envelope-associated proteins in Saccharomyces cerevisiae
2008 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Proteins of the nuclear envelope play important roles in a variety of cellular processes e.g. transport of proteins between the nucleus and cytoplasm, co-ordination of nuclear and cytoplasmic events, anchoring of chromatin to the nuclear periphery and regulation of transcription. Defects in proteins of the nuclear envelope and the nuclear pore complexes have been related to a number of human diseases. To understand the cellular functions in which nuclear envelope proteins participate it is crucial to map the functions of these proteins.

The present study was done in order to characterize the role of three different proteins in functions related to the nuclear envelope in the yeast Saccharomyces cerevisiae. The arginine methyltransferase Rmt2 was demonstrated to associate with proteins of the nuclear pore complexes and to influence nuclear export. In addition, Rmt2 was found to interact with the Lsm4 protein involved in RNA degradation, splicing and ribosome biosynthesis. These results provide support for a role of Rmt2 at the nuclear periphery and potentially in nuclear transport and RNA processing. The integral membrane protein Cwh43 was localized to the inner nuclear membrane and was also found at the nucleolus. A nuclear function for Cwh43 was demonstrated by its ability to bind DNA in vitro. A link to nucleolar functions was demonstrated by genetic analysis. Furthermore, Cwh43 is interacting with signalling pathways perhaps acting as a sensor for signals transmitted from the cytoplasm to the nucleus. The Myr1 protein was found to be membrane-associated and to interact with proteins involved in vesicular traffic. Overexpression of Myr1 affects nuclear morphology and nuclear pore distribution suggesting a function in membrane dynamics.

In conclusion, the presented results aid in a deeper understanding of functions related to the nuclear envelope in revealing a novel link between arginine methylation and the nuclear periphery, identifying a novel inner nuclear membrane protein and a new membrane-associated protein.

sted, utgiver, år, opplag, sider
Stockholm: Department of Biochemistry and Biophysics, Stockholm university, 2008. s. 58
Emneord
Nucleus, nuclear envelope, nuclear pore complexes, vesicular traffic, arginine methylation, Rmt2, Cwh43, Myr1
HSV kategori
Identifikatorer
urn:nbn:se:sh:diva-32040 (URN)978-91-7155-666-0 (ISBN)
Disputas
2008-05-29, MA 636, Alfred Nobels allé 7, Huddinge, 13:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2017-02-13 Laget: 2017-02-13 Sist oppdatert: 2017-02-13bibliografisk kontrollert

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