1un0: Difference between revisions

Revision as of 16:26, 21 February 2008

CRYSTAL STRUCTURE OF YEAST KARYOPHERIN (IMPORTIN) ALPHA IN COMPLEX WITH A NUP2P N-TERMINAL FRAGMENT

OverviewOverview

The yeast nucleoporin Nup2p is associated primarily with the nuclear basket of nuclear pore complexes and is required for efficient importin-alpha:beta-mediated nuclear protein import as well as efficient nuclear export of Kap60p/importin-alpha. Residues 1-51 of Nup2p bind tightly to Kap60p and are required for Nup2p function in vivo. We have determined the 2.6 A resolution crystal structure of a complex between this region of Nup2p and the armadillo repeat domain of Kap60p. Nup2p binds along the inner concave groove of Kap60p, but its interaction interface is different from that employed for nuclear localization signal (NLS) recognition although there is some overlap between them. Nup2p binds Kap60p more strongly than NLSs and accelerates release of NLSs from Kap60p. Nup2p itself is released from Kap60p by Cse1p:RanGTP only in the presence of the importin-beta binding (IBB) domain of Kap60p. These data indicate that Nup2p increases the overall rate of nuclear trafficking by coordinating nuclear import termination and importin recycling as a concerted process.

About this StructureAbout this Structure

1UN0 is a Protein complex structure of sequences from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.

ReferenceReference

Structural basis for Nup2p function in cargo release and karyopherin recycling in nuclear import., Matsuura Y, Lange A, Harreman MT, Corbett AH, Stewart M, EMBO J. 2003 Oct 15;22(20):5358-69. PMID:14532109

Page seeded by OCA on Thu Feb 21 15:26:18 2008

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OCA

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-[[Image:1un0.jpg|left|200px]]<br /><applet load="1un0" size="450" color="white" frame="true" align="right" spinBox="true"
+[[Image:1un0.jpg|left|200px]]<br /><applet load="1un0" size="350" color="white" frame="true" align="right" spinBox="true"
 caption="1un0, resolution 2.60&Aring;" />
 '''CRYSTAL STRUCTURE OF YEAST KARYOPHERIN (IMPORTIN) ALPHA IN COMPLEX WITH A NUP2P N-TERMINAL FRAGMENT'''<br />
 ==Overview==
-The yeast nucleoporin Nup2p is associated primarily with the nuclear, basket of nuclear pore complexes and is required for efficient, importin-alpha:beta-mediated nuclear protein import as well as efficient, nuclear export of Kap60p/importin-alpha. Residues 1-51 of Nup2p bind, tightly to Kap60p and are required for Nup2p function in vivo. We have, determined the 2.6 A resolution crystal structure of a complex between, this region of Nup2p and the armadillo repeat domain of Kap60p. Nup2p, binds along the inner concave groove of Kap60p, but its interaction, interface is different from that employed for nuclear localization signal, (NLS) recognition although there is some overlap between them. Nup2p binds, Kap60p more strongly than NLSs and accelerates release of NLSs from, Kap60p. Nup2p itself is released from Kap60p by Cse1p:RanGTP only in the, presence of the importin-beta binding (IBB) domain of Kap60p. These data, indicate that Nup2p increases the overall rate of nuclear trafficking by, coordinating nuclear import termination and importin recycling as a, concerted process.
+The yeast nucleoporin Nup2p is associated primarily with the nuclear basket of nuclear pore complexes and is required for efficient importin-alpha:beta-mediated nuclear protein import as well as efficient nuclear export of Kap60p/importin-alpha. Residues 1-51 of Nup2p bind tightly to Kap60p and are required for Nup2p function in vivo. We have determined the 2.6 A resolution crystal structure of a complex between this region of Nup2p and the armadillo repeat domain of Kap60p. Nup2p binds along the inner concave groove of Kap60p, but its interaction interface is different from that employed for nuclear localization signal (NLS) recognition although there is some overlap between them. Nup2p binds Kap60p more strongly than NLSs and accelerates release of NLSs from Kap60p. Nup2p itself is released from Kap60p by Cse1p:RanGTP only in the presence of the importin-beta binding (IBB) domain of Kap60p. These data indicate that Nup2p increases the overall rate of nuclear trafficking by coordinating nuclear import termination and importin recycling as a concerted process.
 ==About this Structure==
-UN0 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1UN0 OCA].
+UN0 is a [http://en.wikipedia.org/wiki/Protein_complex Protein complex] structure of sequences from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1UN0 OCA].
 ==Reference==
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 [[Category: Protein complex]]
 [[Category: Saccharomyces cerevisiae]]
-[[Category: Corbett, A.H.]]
+[[Category: Corbett, A H.]]
-[[Category: Harreman, M.T.]]
+[[Category: Harreman, M T.]]
 [[Category: Lange, A.]]
 [[Category: Matsuura, Y.]]
@@ Line 24: / Line 24: @@
 [[Category: nucleoporin]]
-''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Wed Nov 21 04:15:15 2007''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 15:26:18 2008''