1w5t
From Proteopedia
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'''STRUCTURE OF THE AEROPYRUM PERNIX ORC2 PROTEIN (ADPNP-ADP COMPLEXES)''' | '''STRUCTURE OF THE AEROPYRUM PERNIX ORC2 PROTEIN (ADPNP-ADP COMPLEXES)''' | ||
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[[Category: Singleton, M R.]] | [[Category: Singleton, M R.]] | ||
[[Category: Wigley, D B.]] | [[Category: Wigley, D B.]] | ||
| - | [[Category: | + | [[Category: Aaa+ atpase]] |
| - | [[Category: | + | [[Category: Cdc6]] |
| - | [[Category: | + | [[Category: Dna binding protein]] |
| - | [[Category: | + | [[Category: Dna replication initiation]] |
| - | [[Category: | + | [[Category: Orc]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 13:11:56 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 10:11, 3 May 2008
STRUCTURE OF THE AEROPYRUM PERNIX ORC2 PROTEIN (ADPNP-ADP COMPLEXES)
Overview
Archaea contain one or more proteins with homology to eukaryotic ORC/Cdc6 proteins. Sequence analysis suggests the existence of at least two subfamilies of these proteins, for which we propose the nomenclature ORC1 and ORC2. We have determined crystal structures of the ORC2 protein from the archaeon Aeropyrum pernix in complexes with ADP or a non-hydrolysable ATP analogue, ADPNP. Between two crystal forms, there are three crystallographically independent views of the ADP complex and two of the ADPNP complex. The protein molecules in the three complexes with ADP adopt very different conformations, while the two complexes with ADPNP are the same. These structures indicate that there is considerable conformational flexibility in ORC2 but that ATP binding stabilises a single conformation. We show that the ORC2 protein can bind DNA, and that this activity is associated with the C-terminal domain of the protein. We present a model for the interaction of the winged helix (WH) domain of ORC2 with DNA that differs from that proposed previously for Pyrobaculum aerophilum ORC/Cdc6.
About this Structure
1W5T is a Single protein structure of sequence from Aeropyrum pernix. Full crystallographic information is available from OCA.
Reference
Conformational changes induced by nucleotide binding in Cdc6/ORC from Aeropyrum pernix., Singleton MR, Morales R, Grainge I, Cook N, Isupov MN, Wigley DB, J Mol Biol. 2004 Oct 22;343(3):547-57. PMID:15465044 Page seeded by OCA on Sat May 3 13:11:56 2008
