1ou4

<table><tr><td colspan='2'>[[1ou4]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OU4 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1OU4 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=6MP:6-METHYLPURINE'>6MP</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1ecp|1ecp]], [[1a9o|1a9o]], [[1otx|1otx]], [[1oty|1oty]], [[1oum|1oum]], [[1ov6|1ov6]], [[1ovg|1ovg]]</div></td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">DEOD OR PUP OR B4384 OR Z5986 OR ECS5343 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Purine-nucleoside_phosphorylase Purine-nucleoside phosphorylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.1 2.4.2.1] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1ou4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ou4 OCA], [http://pdbe.org/1ou4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ou4 RCSB], [http://www.ebi.ac.uk/pdbsum/1ou4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ou4 ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/DEOD_ECOLI DEOD_ECOLI]] Cleavage of guanosine or inosine to respective bases and sugar-1-phosphate molecules.[HAMAP-Rule:MF_01627]

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== Publication Abstract from PubMed ==

Activation of prodrugs by Escherichia coli purine nucleoside phosphorylase (PNP) provides a method for selectively killing tumor cells expressing a transfected PNP gene. This gene therapy approach requires matching a prodrug and a known enzymatic activity present only in tumor cells. The specificity of the method relies on avoiding prodrug cleavage by enzymes already present in the host cells or the intestinal flora. Using crystallographic and computer modeling methods as guides, we have redesigned E. coli PNP to cleave new prodrug substrates more efficiently than does the wild-type enzyme. In particular, the M64V PNP mutant cleaves 9-(6-deoxy-alpha-L-talofuranosyl)-6-methylpurine with a kcat/Km over 100 times greater than for native E. coli PNP. In a xenograft tumor experiment, this compound caused regression of tumors expressing the M64V PNP gene.

Designer gene therapy using an Escherichia coli purine nucleoside phosphorylase/prodrug system.,Bennett EM, Anand R, Allan PW, Hassan AE, Hong JS, Levasseur DN, McPherson DT, Parker WB, Secrist JA 3rd, Sorscher EJ, Townes TM, Waud WR, Ealick SE Chem Biol. 2003 Dec;10(12):1173-81. PMID:14700625<ref>PMID:14700625</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1ou4" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Bacillus coli migula 1895]]

[[Category: Allan, P W]]

[[Category: Anand, R]]

[[Category: Bennett, E M]]

[[Category: Ealick, S E]]

[[Category: Hassan, A E]]

[[Category: McPherson, D T]]

[[Category: Parker, W B]]

[[Category: Secrist, J A]]

[[Category: Sorscher, E J]]

[[Category: Transferase]]