1re0

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[[Image:1re0.jpg|left|200px]]
[[Image:1re0.jpg|left|200px]]
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{{Structure
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|PDB= 1re0 |SIZE=350|CAPTION= <scene name='initialview01'>1re0</scene>, resolution 2.40&Aring;
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The line below this paragraph, containing "STRUCTURE_1re0", creates the "Structure Box" on the page.
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|SITE=
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|LIGAND= <scene name='pdbligand=AFB:1,6,7,8,9,11A,12,13,14,14A-DECAHYDRO-1,13-DIHYDROXY-6-METHYL-4H-CYCLOPENT[F]OXACYCLOTRIDECIN-4-ONE'>AFB</scene>, <scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=GDP:GUANOSINE-5&#39;-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>
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|GENE= ARF1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]), Gea1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 Saccharomyces cerevisiae])
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|DOMAIN=
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{{STRUCTURE_1re0| PDB=1re0 | SCENE= }}
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|RELATEDENTRY=
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1re0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1re0 OCA], [http://www.ebi.ac.uk/pdbsum/1re0 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1re0 RCSB]</span>
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'''Structure of ARF1-GDP bound to Sec7 domain complexed with Brefeldin A'''
'''Structure of ARF1-GDP bound to Sec7 domain complexed with Brefeldin A'''
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[[Category: Goldberg, J.]]
[[Category: Goldberg, J.]]
[[Category: Mossessova, E.]]
[[Category: Mossessova, E.]]
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[[Category: all-helical]]
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[[Category: All-helical]]
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[[Category: alph-beta]]
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[[Category: Alph-beta]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 07:22:56 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:26:50 2008''
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Revision as of 04:22, 3 May 2008

Image:1re0.jpg

Template:STRUCTURE 1re0

Structure of ARF1-GDP bound to Sec7 domain complexed with Brefeldin A


Overview

ARF GTPases are activated by guanine nucleotide exchange factors (GEFs) of the Sec7 family that promote the exchange of GDP for GTP. Brefeldin A (BFA) is a fungal metabolite that binds to the ARF1*GDP*Sec7 complex and blocks GEF activity at an early stage of the reaction, prior to guanine nucleotide release. The crystal structure of the ARF1*GDP*Sec7*BFA complex shows that BFA binds at the protein-protein interface to inhibit conformational changes in ARF1 required for Sec7 to dislodge the GDP molecule. Based on a comparative analysis of the inhibited complex, nucleotide-free ARF1*Sec7 and ARF1*GDP, we suggest that, in addition to forcing nucleotide release, the ARF1-Sec7 binding energy is used to open a cavity on ARF1 to facilitate the rearrangement of hydrophobic core residues between the GDP and GTP conformations. Thus, the Sec7 domain may act as a dual catalyst, facilitating both nucleotide release and conformational switching on ARF proteins.

About this Structure

1RE0 is a Protein complex structure of sequences from Homo sapiens and Saccharomyces cerevisiae. Full crystallographic information is available from OCA.

Reference

Crystal structure of ARF1*Sec7 complexed with Brefeldin A and its implications for the guanine nucleotide exchange mechanism., Mossessova E, Corpina RA, Goldberg J, Mol Cell. 2003 Dec;12(6):1403-11. PMID:14690595 Page seeded by OCA on Sat May 3 07:22:56 2008

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