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1wlf

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{{STRUCTURE_1wlf| PDB=1wlf | SCENE= }}
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'''Structure of the N-terminal domain of PEX1 AAA-ATPase: Characterization of a putative adaptor-binding domain'''
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===Structure of the N-terminal domain of PEX1 AAA-ATPase: Characterization of a putative adaptor-binding domain===
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==Overview==
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Peroxisomes are responsible for several pathways in primary metabolism, including beta-oxidation and lipid biosynthesis. PEX1 and PEX6 are hexameric AAA-type ATPases, both of which are indispensable in targeting over 50 peroxisomal resident proteins from the cytosol to the peroxisomes. Although the tandem AAA-ATPase domains in the central region of PEX1 and PEX6 are highly similar, the N-terminal sequences are unique. To better understand the distinct molecular function of these two proteins, we analyzed the unique N-terminal domain (NTD) of PEX1. Extensive computational analysis revealed weak similarity (&lt;10% identity) of PEX1 NTD to the N-terminal domains of other membrane-related type II AAA-ATPases, such as VCP (p97) and NSF. We have determined the crystal structure of mouse PEX1 NTD at 2.05-A resolution, which clearly demonstrated that the domain belongs to the double-psi-barrel fold family found in the other AAA-ATPases. The N-domains of both VCP and NSF are structural neighbors of PEX1 NTD with a 2.7- and 2.1-A root mean square deviation of backbone atoms, respectively. Our findings suggest that the supradomain architecture, which is composed of a single N-terminal domain followed by tandem AAA domains, is a common feature of organellar membrane-associating AAA-ATPases. We propose that PEX1 functions as a protein unfoldase in peroxisomal biogenesis, using its N-terminal putative adaptor-binding domain.
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==About this Structure==
==About this Structure==
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[[Category: Tomii, K.]]
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[[Category: N-terminal domain]]
[[Category: N-terminal domain]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 20:51:25 2008''

Revision as of 17:51, 28 July 2008

Image:1wlf.png

Template:STRUCTURE 1wlf

Structure of the N-terminal domain of PEX1 AAA-ATPase: Characterization of a putative adaptor-binding domain

Template:ABSTRACT PUBMED 15328346

About this Structure

Full crystallographic information is available from OCA.

Reference

Structure of the N-terminal domain of PEX1 AAA-ATPase. Characterization of a putative adaptor-binding domain., Shiozawa K, Maita N, Tomii K, Seto A, Goda N, Akiyama Y, Shimizu T, Shirakawa M, Hiroaki H, J Biol Chem. 2004 Nov 26;279(48):50060-8. Epub 2004 Aug 24. PMID:15328346

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