Abstract：
:As a start to understanding the importance of intracellular proteolysis in the protozoon Leishmania mexicana, the parasite proteasome has been purified and characterised. The L. mexicana proteasome is similar to proteasomes from other eukaryotes. It is soluble, and the 20S form has a mass of around 670 kDa, composed of at least 10 distinct subunits in the 22 to 32 kDa size range. The molecular mass of the L. mexicana proteasome increases to 1200 kDa in the presence of adenosine-5'-triphosphate, consistent with there being a 26S proteasome in the parasite. The purified 20S proteasome has activity towards substrates with hydrophobic, basic and acidic P, residues, and is sensitive to a range of peptide aldehyde inhibitors, as well as the proteasome-specific inhibitor lactacystin. The peptide aldehydes are able to arrest parasite growth in vitro with the same relative effectiveness as against the purified proteasome activity. The parasite population arrests with an increased 4N DNA content, indicating that, in part, the essential nature of the proteasome for L. mexicana proliferation is due to a role in the parasite cell cycle. Surprisingly, lactacystin is a relatively inefficient inhibitor of L. mexicana growth in vitro.
journal_name
Mol Biochem Parasitoljournal_title
Molecular and biochemical parasitologyauthors
Robertson CDdoi
10.1016/s0166-6851(99)00110-3subject
Has Abstractpub_date
1999-09-20 00:00:00pages
49-60issue
1eissn
0166-6851issn
1872-9428pii
S0166-6851(99)00110-3journal_volume
103pub_type
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更新日期：1981-04-01 00:00:00
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journal_title：Molecular and biochemical parasitology
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doi：10.1016/0166-6851(92)90022-c
更新日期：1992-07-01 00:00:00
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更新日期：2010-11-01 00:00:00
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journal_title：Molecular and biochemical parasitology
pub_type： 杂志文章
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更新日期：2005-12-01 00:00:00
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journal_title：Molecular and biochemical parasitology
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doi：10.1016/0166-6851(96)02573-x
更新日期：1996-04-01 00:00:00
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journal_title：Molecular and biochemical parasitology
pub_type： 杂志文章
doi：10.1016/0166-6851(95)00089-j
更新日期：1995-06-01 00:00:00
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journal_title：Molecular and biochemical parasitology
pub_type： 杂志文章
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更新日期：2002-01-01 00:00:00
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journal_title：Molecular and biochemical parasitology
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更新日期：1995-11-01 00:00:00
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更新日期：1997-12-01 00:00:00
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更新日期：1992-09-01 00:00:00
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更新日期：2008-04-01 00:00:00
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journal_title：Molecular and biochemical parasitology
pub_type： 杂志文章
doi：10.1016/j.molbiopara.2010.04.002
更新日期：2010-08-01 00:00:00
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journal_title：Molecular and biochemical parasitology
pub_type： 杂志文章
doi：10.1016/0166-6851(89)90136-9
更新日期：1989-06-01 00:00:00
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pub_type： 杂志文章
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更新日期：2001-04-06 00:00:00
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更新日期：1990-02-01 00:00:00
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journal_title：Molecular and biochemical parasitology
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更新日期：1989-03-01 00:00:00
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更新日期：2004-10-01 00:00:00
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更新日期：1998-06-01 00:00:00
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更新日期：2014-02-01 00:00:00
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journal_title：Molecular and biochemical parasitology
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更新日期：2007-01-01 00:00:00
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pub_type： 杂志文章
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更新日期：2012-08-01 00:00:00
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journal_title：Molecular and biochemical parasitology
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更新日期：2009-10-01 00:00:00
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journal_title：Molecular and biochemical parasitology
pub_type： 杂志文章
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更新日期：1992-10-01 00:00:00
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journal_title：Molecular and biochemical parasitology
pub_type： 杂志文章
doi：10.1016/0166-6851(91)90070-m
更新日期：1991-12-01 00:00:00
