View source for 3djo


==Bovine Seminal Ribonuclease uridine 2' phosphate complex==
<StructureSection load='3djo' size='340' side='right'caption='[[3djo]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3djo]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3DJO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3DJO FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.6&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=U2P:PHOSPHORIC+ACID+MONO-[2-(2,4-DIOXO-3,4-DIHYDRO-2H-PYRIMIDIN-1-YL)-4-HYDROXY-5-HYDROXYMETHYL-TETRAHYDRO-FURAN-3-YL]+ESTER'>U2P</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3djo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3djo OCA], [https://pdbe.org/3djo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3djo RCSB], [https://www.ebi.ac.uk/pdbsum/3djo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3djo ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/RNS_BOVIN RNS_BOVIN] This enzyme hydrolyzes both single- and double-stranded RNA.
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dj/3djo_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3djo ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
Bovine seminal ribonuclease (BS-RNase) is a 27kDa homodimeric enzyme and a member of the pancreatic RNase A superfamily. It is the only RNase with a quaternary structure and it is a mixture of two dimeric forms. In the most abundant form the active site is formed by the swapping of the N-terminal segments. BS-RNase is a potent antitumor agent with severe side effects such as aspermatogenicity, and immunosuppression. As a first step towards the design of potent inhibitors of this enzyme we mapped its active site through the study of the binding of uridine 2'-phosphate (U2'p), uridine 3'-phosphate (U3'p), uridine 5'-diphosphate (UDP), cytidine 3'-phosphate (C3'p), and cytidine 5-phosphate (C5'p), by kinetics, and X-ray crystallography. These phosphonucleotides are potent inhibitors with C3'p being the most potent with a K(i) value of 22 microM. Absorption, distribution, metabolism, and excretion pharmacokinetic property predictions reveal U2'p, U3'p, and C5'p as the most promising with respect to oral bioavailability. In vivo studies on the aspermatogenic effect have shown that C3'p and C5'p inhibit significantly this biological action of BS-RNase.

Mapping the ribonucleolytic active site of bovine seminal ribonuclease. The binding of pyrimidinyl phosphonucleotide inhibitors.,Dossi K, Tsirkone VG, Hayes JM, Matousek J, Pouckova P, Soucek J, Zadinova M, Zographos SE, Leonidas DD Eur J Med Chem. 2009 Nov;44(11):4496-508. Epub 2009 Jul 29. PMID:19643512<ref>PMID:19643512</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bos taurus]]
[[Category: Large Structures]]
[[Category: Dossi K]]
[[Category: Leonidas DD]]
[[Category: Oikonomakos NG]]
[[Category: Zographos SE]]