New crystal forms and low resolution structure analysis of 20S proteasomes from bovine liver.

Abstract:

:20S proteasomes from higher eukaryotes have immunological functions rather than those from archibacteria or yeast. To clarify the mechanism of the sorting and production of antigen-presenting peptides, it is important and worthwhile to determine the structure of mammalian proteasomes using a third generation synchrotron radiation source. Here we report new crystal forms of 20S proteasomes from bovine liver and preliminary structure analysis of them. The crystals belong to the same space group but have different cell dimensions. One crystal (form I) belongs to space group P2(1)2(1)2(1) with unit cell dimensions of a = 124.8, b =197.4, c =323.8 A, and diffracts to 3.0 A resolution. The other crystal (form II) belongs to the same space group with a =115.1, b =205.6, c =316. 0 A, and diffracts to 4.0 A resolution. The diffraction data for the form I crystal provided an interpretable electron density map for presenting the structural differences from yeast proteasomes.

journal_name

J Biochem

journal_title

Journal of biochemistry

authors

Tomisugi Y,Unno M,Mizushima T,Morimoto Y,Tanahashi N,Tanaka K,Tsukihara T,Yasuoka N

doi

10.1093/oxfordjournals.jbchem.a022709

keywords:

subject

Has Abstract

pub_date

2000-06-01 00:00:00

pages

941-3

issue

6

eissn

0021-924X

issn

1756-2651

journal_volume

127

pub_type

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