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1wuc

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[[Image:1wuc.gif|left|200px]]
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{{Structure
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'''Crystal structure of the type 1 RIP bouganin'''
'''Crystal structure of the type 1 RIP bouganin'''
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[[Category: Ripamonti, A.]]
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[[Category: Stirpe, F.]]
[[Category: Stirpe, F.]]
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[[Category: alpha-beta protein]]
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[[Category: Alpha-beta protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 14:08:47 2008''
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Revision as of 11:08, 3 May 2008

Image:1wuc.gif

Template:STRUCTURE 1wuc

Crystal structure of the type 1 RIP bouganin


Overview

Immunotoxins specific for the CD80 and CD86 antigens were prepared by linking three type 1 ribosome-inactivating proteins (RIPs), namely bouganin, gelonin and saporin-S6, to the monoclonal antibodies M24 (anti-CD80) and 1G10 (anti-CD86). These immunotoxins showed a specific cytotoxicity for the CD80/CD86-expressing cell lines Raji and L428. The immunotoxins inhibited protein synthesis by target cells with IC50s (concentration causing 50% inhibition) ranging from 0.25 to 192 pmol/l as RIPs. The anti-CD80 immunotoxins appeared 1-2 log more toxic for target cells than the anti-CD86 ones. Immunotoxins containing saporin and bouganin induced apoptosis of target cells. The toxicity for bone marrow haemopoietic progenitors of these conjugates was also evaluated. Bouganin and related immunotoxins at concentrations up to 100 nmol/l did not significantly affect the recovery of committed progenitors or of more primitive cells. The saporin-containing immunotoxins at concentrations >/= 1 nmol/l showed some toxicity on colony-forming unit cells (CFU-C). The expression of the CD80 and CD86 molecules is prevalently restricted to antigen-presenting cells and is also strong on Hodgkin and Reed-Sternberg cells in Hodgkin's disease. Present results suggest that immunotoxins targeting type 1 ribosome-inactivating proteins to these antigens could be considered and further studied for the therapy of Hodgkin's disease or other CD80/CD86-expressing tumours.

About this Structure

1WUC is a Single protein structure of sequence from Bougainvillea spectabilis. Full crystallographic information is available from OCA.

Reference

In vitro anti-tumour activity of anti-CD80 and anti-CD86 immunotoxins containing type 1 ribosome-inactivating proteins., Bolognesi A, Polito L, Tazzari PL, Lemoli RM, Lubelli C, Fogli M, Boon L, de Boer M, Stirpe F, Br J Haematol. 2000 Aug;110(2):351-61. PMID:10971392 Page seeded by OCA on Sat May 3 14:08:47 2008

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