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X-ray structure of glutathione S-transferase from the malarial parasite Plasmodium falciparum.

Abstract：

:GSTs catalyze the conjugation of glutathione with a wide variety of hydrophobic compounds, generally resulting in nontoxic products that can be readily eliminated. In contrast to many other organisms, the malarial parasite Plasmodium falciparum possesses only one GST isoenzyme (PfGST). This GST is highly abundant in the parasite, its activity was found to be increased in chloroquine-resistant cells, and it has been shown to act as a ligandin for parasitotoxic hemin. Thus, the enzyme represents a promising target for antimalarial drug development. We now have solved the crystal structure of PfGST at a resolution of 1.9 A. The homodimeric protein of 26 kDa per subunit represents a GST form that cannot be assigned to any of the known GST classes. In comparison to other GSTs, and, in particular, to the human isoforms, PfGST possesses a shorter C-terminal section resulting in a more solvent-accessible binding site for the hydrophobic and amphiphilic substrates. The structure furthermore reveals features in this region that could be exploited for the design of specific PfGST inhibitors.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Fritz-Wolf K,Becker A,Rahlfs S,Harwaldt P,Schirmer RH,Kabsch W,Becker K

doi

10.1073/pnas.2333763100

keywords:

subject

Has Abstract

pub_date

2003-11-25 00:00:00

pages

13821-6

issue

24

eissn

0027-8424

issn

1091-6490

pii

2333763100

journal_volume

100

pub_type

杂志文章

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