1o6o

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[[Image:1o6o.gif|left|200px]]
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{{Seed}}
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[[Image:1o6o.png|left|200px]]
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{{STRUCTURE_1o6o| PDB=1o6o | SCENE= }}
{{STRUCTURE_1o6o| PDB=1o6o | SCENE= }}
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'''IMPORTIN BETA AA1-442 BOUND TO FIVE FXFG REPEATS FROM YEAST NSP1P. SECOND CRYSTAL FORM'''
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===IMPORTIN BETA AA1-442 BOUND TO FIVE FXFG REPEATS FROM YEAST NSP1P. SECOND CRYSTAL FORM===
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==Overview==
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The interaction between nuclear pore proteins (nucleoporins) and transport factors is crucial for the translocation of macromolecules through nuclear pores. Many nucleoporins contain FG sequence repeats, and previous studies have demonstrated interactions between repeats containing FxFG or GLFG cores and transport factors. The crystal structure of residues 1-442 of importin-beta bound to a GLFG peptide indicates that this repeat core binds to the same primary site as FxFG cores. Importin-beta-I178D shows reduced binding to both FxFG and GLFG repeats, consistent with both binding to an overlapping site in the hydrophobic groove between the A-helices of HEAT repeats 5 and 6. Moreover, FxFG repeats can displace importin-beta or its S. cerevisiae homologue, Kap95, bound to GLFG repeats. Addition of soluble GLFG repeats decreases the rate of nuclear protein import in digitonin-permeabilized HeLa cells, indicating that this interaction has a role in the translocation of carrier-cargo complexes through nuclear pores. The binding of GLFG and FxFG repeats to overlapping sites on importin-beta indicates that functional differences between different repeats probably arise from differences in their spatial organization.
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The line below this paragraph, {{ABSTRACT_PUBMED_12372823}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 12372823 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12372823}}
==About this Structure==
==About this Structure==
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[[Category: Repeat]]
[[Category: Repeat]]
[[Category: Transport factor]]
[[Category: Transport factor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 03:26:57 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 08:37:52 2008''

Revision as of 05:37, 28 July 2008

Image:1o6o.png

Template:STRUCTURE 1o6o

IMPORTIN BETA AA1-442 BOUND TO FIVE FXFG REPEATS FROM YEAST NSP1P. SECOND CRYSTAL FORM

Template:ABSTRACT PUBMED 12372823

About this Structure

1O6O is a Protein complex structure of sequences from Homo sapiens and Saccharomyces cerevisiae. Full crystallographic information is available from OCA.

Reference

GLFG and FxFG nucleoporins bind to overlapping sites on importin-beta., Bayliss R, Littlewood T, Strawn LA, Wente SR, Stewart M, J Biol Chem. 2002 Dec 27;277(52):50597-606. Epub 2002 Oct 7. PMID:12372823

Page seeded by OCA on Mon Jul 28 08:37:52 2008

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