1wpp

<StructureSection load='1wpp' size='340' side='right' caption='[[1wpp]], [[Resolution|resolution]] 2.05&Aring;' scene=''>

<table><tr><td colspan='2'>[[1wpp]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Strgc Strgc]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WPP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1WPP FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1wpm|1wpm]], [[1wpn|1wpn]]</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Inorganic_diphosphatase Inorganic diphosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.1.1 3.6.1.1] </span></td></tr>

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

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/wp/1wpp_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

Family II inorganic pyrophosphatases (PPases) constitute a new evolutionary group of PPases, with a different fold and mechanism than the common family I enzyme; they are related to the "DHH" family of phosphoesterases. Biochemical studies have shown that Mn(2+) and Co(2+) preferentially activate family II PPases; Mg(2+) partially activates; and Zn(2+) can either activate or inhibit (Zyryanov et al., Biochemistry, 43, 14395-14402, accompanying paper in this issue). The three solved family II PPase structures did not explain the differences between the PPase families nor the metal ion differences described above. We therefore solved three new family II PPase structures: Bacillus subtilis PPase (Bs-PPase) dimer core bound to Mn(2+) at 1.3 A resolution, and, at 2.05 A resolution, metal-free Bs-PPase and Streptococcus gordonii (Sg-PPase) containing sulfate and Zn(2+). Comparison of the new and old structures of various family II PPases demonstrates why the family II enzyme prefers Mn(2+) or Co(2+), as an activator rather than Mg(2+). Both M1 and M2 undergo significant changes upon substrate binding, changing from five-coordinate to octahedral geometry. Mn(2+) and Co(2+), which readily adopt different coordination states and geometries, are thus favored. Combining our structures with biochemical data, we identified M2 as the high-affinity metal site. Zn(2+) activates in the M1 site, where octahedral geometry is not essential for catalysis, but inhibits in the M2 site, because it is unable to assume octahedral geometry but remains trigonal bipyramidal. Finally, we propose that Lys205-Gln81-Gln80 form a hydrophilic channel to speed product release from the active site.

 

== References ==

[[Category: Inorganic diphosphatase]]

[[Category: Strgc]]

[[Category: Baykov, A A]]

[[Category: Fabrichniy, I P]]

[[Category: Goldman, A]]

[[Category: Lahti, R]]

[[Category: Lehtio, L]]

[[Category: Salminen, A]]

[[Category: Metal binding]]