View source for 2o05


==Human spermidine synthase==
<StructureSection load='2o05' size='340' side='right'caption='[[2o05]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2o05]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1zdz 1zdz]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2O05 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2O05 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]] 2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MTA:5-DEOXY-5-METHYLTHIOADENOSINE'>MTA</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=2o05 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2o05 OCA], [https://pdbe.org/2o05 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2o05 RCSB], [https://www.ebi.ac.uk/pdbsum/2o05 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2o05 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/SPEE_HUMAN SPEE_HUMAN] Catalyzes the production of spermidine from putrescine and decarboxylated S-adenosylmethionine (dcSAM). Has a strong preference for putrescine as substrate, and has very low activity towards 1,3-diaminopropane. Has extremely low activity towards spermidine.
== 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/o0/2o05_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=2o05 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Aminopropyltransferases transfer aminopropyl groups from decarboxylated S-adenosylmethionine to amine acceptors, forming polyamines. Structural and biochemical studies have been carried out with the human spermidine synthase, which is highly specific for putrescine as the amine acceptor, and the Thermotoga maritima spermidine synthase, which prefers putrescine but is more tolerant of other substrates. Comparison of the structures of the human spermidine synthase with both substrates and products with the known structure of T. maritima spermidine synthase complexed to a multisubstrate analogue inhibitor and analysis of the properties of site-directed mutants provide a general mechanistic hypothesis for the aminopropyl transfer reaction. The studies also provide a structural basis for the specificity of the spermidine synthase subclass of the aminopropyltransferase family.

Structure and mechanism of spermidine synthases.,Wu H, Min J, Ikeguchi Y, Zeng H, Dong A, Loppnau P, Pegg AE, Plotnikov AN Biochemistry. 2007 Jul 17;46(28):8331-9. Epub 2007 Jun 22. PMID:17585781<ref>PMID:17585781</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 2o05" style="background-color:#fffaf0;"></div>

==See Also==
*[[Spermidine synthase 3D structures|Spermidine synthase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Arrowsmith CH]]
[[Category: Bochkarev A]]
[[Category: Edwards AM]]
[[Category: Loppnau P]]
[[Category: Min J]]
[[Category: Plotnikov AN]]
[[Category: Sundstrom M]]
[[Category: Weigelt J]]
[[Category: Wu H]]
[[Category: Zeng H]]