1upt
From Proteopedia
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==Overview== | ==Overview== | ||
Golgins are large coiled-coil proteins that play a role in Golgi structure, and vesicle traffic. The Arf-like GTPase Arl1 regulates the translocation, of GRIP domain-containing golgins to Golgi membranes. We report here the, 1.7 A resolution structure of human Arl1-GTP in a complex with the GRIP, domain of golgin-245. The structure reveals that the GRIP domain consists, of an S-shaped arrangement of three helices. The domain forms a homodimer, that binds two Arl1-GTPs using two helices from each monomer. The, structure is consistent with golgin-245 forming parallel coiled-coils and, suggests how Arl1-GTP/GRIP complexes interact with Golgi membranes via the, N termini of Arl1-GTP and the C-terminal tails of the GRIP domains. In, cells, bivalent association with Arl1-GTP would increase residence time of, the golgins on Golgi membranes. Despite no conservation of sequence, topology, or even helical direction, several other effectors form similar, interactions with small GTPases via a pair of alpha helices, suggesting a, common structural basis for effector recognition. | Golgins are large coiled-coil proteins that play a role in Golgi structure, and vesicle traffic. The Arf-like GTPase Arl1 regulates the translocation, of GRIP domain-containing golgins to Golgi membranes. We report here the, 1.7 A resolution structure of human Arl1-GTP in a complex with the GRIP, domain of golgin-245. The structure reveals that the GRIP domain consists, of an S-shaped arrangement of three helices. The domain forms a homodimer, that binds two Arl1-GTPs using two helices from each monomer. The, structure is consistent with golgin-245 forming parallel coiled-coils and, suggests how Arl1-GTP/GRIP complexes interact with Golgi membranes via the, N termini of Arl1-GTP and the C-terminal tails of the GRIP domains. In, cells, bivalent association with Arl1-GTP would increase residence time of, the golgins on Golgi membranes. Despite no conservation of sequence, topology, or even helical direction, several other effectors form similar, interactions with small GTPases via a pair of alpha helices, suggesting a, common structural basis for effector recognition. | ||
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| + | ==Disease== | ||
| + | Known disease associated with this structure: Leukemia, chronic lymphatic, susceptibility to OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=609351 609351]] | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: vesicle trafficking]] | [[Category: vesicle trafficking]] | ||
| - | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov | + | ''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Mon Nov 12 19:37:33 2007'' |
Revision as of 17:31, 12 November 2007
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STRUCTURE OF A COMPLEX OF THE GOLGIN-245 GRIP DOMAIN WITH ARL1
Contents |
Overview
Golgins are large coiled-coil proteins that play a role in Golgi structure, and vesicle traffic. The Arf-like GTPase Arl1 regulates the translocation, of GRIP domain-containing golgins to Golgi membranes. We report here the, 1.7 A resolution structure of human Arl1-GTP in a complex with the GRIP, domain of golgin-245. The structure reveals that the GRIP domain consists, of an S-shaped arrangement of three helices. The domain forms a homodimer, that binds two Arl1-GTPs using two helices from each monomer. The, structure is consistent with golgin-245 forming parallel coiled-coils and, suggests how Arl1-GTP/GRIP complexes interact with Golgi membranes via the, N termini of Arl1-GTP and the C-terminal tails of the GRIP domains. In, cells, bivalent association with Arl1-GTP would increase residence time of, the golgins on Golgi membranes. Despite no conservation of sequence, topology, or even helical direction, several other effectors form similar, interactions with small GTPases via a pair of alpha helices, suggesting a, common structural basis for effector recognition.
Disease
Known disease associated with this structure: Leukemia, chronic lymphatic, susceptibility to OMIM:[609351]
About this Structure
1UPT is a Protein complex structure of sequences from Homo sapiens with MG and GTP as ligands. Structure known Active Site: AC1. Full crystallographic information is available from OCA.
Reference
Structural basis for Arl1-dependent targeting of homodimeric GRIP domains to the Golgi apparatus., Panic B, Perisic O, Veprintsev DB, Williams RL, Munro S, Mol Cell. 2003 Oct;12(4):863-74. PMID:14580338
Page seeded by OCA on Mon Nov 12 19:37:33 2007
Categories: Homo sapiens | Protein complex | Munro, S. | Panic, B. | Perisic, O. | Veprintsev, D.B. | Williams, R.L. | GTP | MG | Arl1 | G-protein | Golgi | Golgin | Golgin-245 | Grip | Grip dimer | Gtpase | Protein sorting | Vesicle trafficking
