4mum: Difference between revisions

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New page: '''Unreleased structure''' The entry 4mum is ON HOLD Authors: Pachl, P., Rezacova, P. Description: Crystal structure of mitochondrial 5'(3')-deoxy ribonucleotidase alternative spliced ...
 
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'''Unreleased structure'''


The entry 4mum is ON HOLD
==Crystal structure of mitochondrial 5'(3')-deoxy ribonucleotidase alternative spliced variant==
<StructureSection load='4mum' size='340' side='right'caption='[[4mum]], [[Resolution|resolution]] 1.27&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4mum]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MUM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4MUM 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]] 1.271&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</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=4mum FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mum OCA], [https://pdbe.org/4mum PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4mum RCSB], [https://www.ebi.ac.uk/pdbsum/4mum PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4mum ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NT5M_HUMAN NT5M_HUMAN] Dephosphorylates specifically the 5' and 2'(3')-phosphates of uracil and thymine deoxyribonucleotides, and so protects mitochondrial DNA replication from excess dTTP. Has only marginal activity towards dIMP and dGMP.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Abstract Human mitochondrial 5'(3')-deoxyribonucleotidase (mdN) catalyzes dephosphorylation of nucleoside monophosphates, and thus helps maintain homeostasis of deoxynucleosides required for mitochondrial DNA synthesis. Mature mdN is a 23-kDa dimeric protein with highest expression levels in the heart, brain and skeletal muscle. We have identified an alternative splice variant of the mdN gene containing an 18-nucleotide insertion encoding 6 amino acids (GKWPAT) at the 3'-end of the penultimate exon 4. We recombinantly expressed this enzyme variant and characterized its biochemical and kinetic properties as well as its three-dimensional structure. Our high-resolution (1.27 A) crystal structure revealed that the insertion forms a loop located in the vicinity of the active site pocket and affects enzyme kinetic parameters as well as protein thermal stability.


Authors: Pachl, P., Rezacova, P.
Kinetic and structural characterization of an alternatively spliced variant of human mitochondrial 5'(3')-deoxyribonucleotidase.,Pachl P, Fabry M, Veverka V, Brynda J, Rezacova P J Enzyme Inhib Med Chem. 2014 Feb 10. PMID:24506201<ref>PMID:24506201</ref>


Description: Crystal structure of mitochondrial 5'(3')-deoxy ribonucleotidase alternative spliced variant
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4mum" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Pachl P]]
[[Category: Rezacova P]]
Retrieved from "https://proteopedia.org/4mum"