1pf7: Difference between revisions
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'''CRYSTAL STRUCTURE OF HUMAN PNP COMPLEXED WITH IMMUCILLIN H''' | '''CRYSTAL STRUCTURE OF HUMAN PNP COMPLEXED WITH IMMUCILLIN H''' | ||
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[[Category: Santos, D S.]] | [[Category: Santos, D S.]] | ||
[[Category: Silva, R G.]] | [[Category: Silva, R G.]] | ||
[[Category: | [[Category: Crystallography]] | ||
[[Category: | [[Category: Drug design]] | ||
[[Category: | [[Category: Purine nucleoside phosphorylase]] | ||
[[Category: | [[Category: Synchrotron]] | ||
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Revision as of 02:00, 3 May 2008
CRYSTAL STRUCTURE OF HUMAN PNP COMPLEXED WITH IMMUCILLIN H
Overview
Purine nucleoside phosphorylase (PNP) catalyzes the phosphorolysis of the N-ribosidic bonds of purine nucleosides and deoxynucleosides. PNP is a target for inhibitor development aiming at T-cell immune response modulation. This work reports on the crystallographic study of the complex of human PNP-immucillin-H (HsPNP-ImmH) solved at 2.6A resolution using synchrotron radiation. Immucillin-H (ImmH) inhibits the growth of malignant T-cell lines in the presence of deoxyguanosine without affecting non-T-cell tumor lines. ImmH inhibits activated normal human T cells after antigenic stimulation in vitro. These biological effects of ImmH suggest that this agent may have utility in the treatment of certain human diseases characterized by abnormal T-cell growth or activation. This is the first structural report of human PNP complexed with immucillin-H. The comparison of the complex HsPNP-ImmH with recent crystallographic structures of human PNP explains the high specificity of immucillin-H for human PNP.
About this Structure
1PF7 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structural basis for inhibition of human PNP by immucillin-H., Filgueira de Azevedo W Jr, Canduri F, Marangoni dos Santos D, Pereira JH, Dias MV, Silva RG, Mendes MA, Basso LA, Palma MS, Santos DS, Biochem Biophys Res Commun. 2003 Oct 3;309(4):917-22. PMID:13679061 Page seeded by OCA on Sat May 3 05:00:57 2008