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==Crystal Structure of Malic Enzyme from Ascaris suum Complexed with Nicotinamide Adenine Dinucleotide== | |||
<StructureSection load='1llq' size='340' side='right'caption='[[1llq]], [[Resolution|resolution]] 2.30Å' scene=''> | |||
| | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1llq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Ascaris_suum Ascaris suum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LLQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1LLQ 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]] 2.3Å</td></tr> | |||
| | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</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=1llq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1llq OCA], [https://pdbe.org/1llq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1llq RCSB], [https://www.ebi.ac.uk/pdbsum/1llq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1llq ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/MAOM_ASCSU MAOM_ASCSU] | |||
== 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/ll/1llq_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=1llq ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The structure of the Ascaris suum mitochondrial NAD-malic enzyme in binary complex with NAD has been solved to a resolution of 2.3 A by X-ray crystallography. The structure resembles that of the human mitochondrial enzyme determined in complex with NAD [Xu, Y., Bhargava, G., Wu, H., Loeber, G., and Tong, L. (1999) Structure 7, 877-889]. The enzyme is a tetramer comprised of subunits possessing four domains organized in an "open" structure typical of the NAD-bound form. The subunit organization, as in the human enzyme, is a dimer of dimers. The Ascaris enzyme contains 30 additional residues at its amino terminus relative to the human enzyme. These residues significantly increase the interactions that promote tetramer formation and give rise to different subunit-subunit interactions. Unlike the mammalian enzyme, the Ascaris malic enzyme is not regulated by ATP, and no ATP binding site is observed in this structure. Although the active sites of the two enzymes are similar, residues interacting with NAD differ between the two. The structure is discussed in terms of the mechanism and particularly with respect to previously obtained kinetic and site-directed mutagenesis experiments. | The structure of the Ascaris suum mitochondrial NAD-malic enzyme in binary complex with NAD has been solved to a resolution of 2.3 A by X-ray crystallography. The structure resembles that of the human mitochondrial enzyme determined in complex with NAD [Xu, Y., Bhargava, G., Wu, H., Loeber, G., and Tong, L. (1999) Structure 7, 877-889]. The enzyme is a tetramer comprised of subunits possessing four domains organized in an "open" structure typical of the NAD-bound form. The subunit organization, as in the human enzyme, is a dimer of dimers. The Ascaris enzyme contains 30 additional residues at its amino terminus relative to the human enzyme. These residues significantly increase the interactions that promote tetramer formation and give rise to different subunit-subunit interactions. Unlike the mammalian enzyme, the Ascaris malic enzyme is not regulated by ATP, and no ATP binding site is observed in this structure. Although the active sites of the two enzymes are similar, residues interacting with NAD differ between the two. The structure is discussed in terms of the mechanism and particularly with respect to previously obtained kinetic and site-directed mutagenesis experiments. | ||
Crystal structure of the malic enzyme from Ascaris suum complexed with nicotinamide adenine dinucleotide at 2.3 A resolution.,Coleman DE, Rao GS, Goldsmith EJ, Cook PF, Harris BG Biochemistry. 2002 Jun 4;41(22):6928-38. PMID:12033925<ref>PMID:12033925</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 1llq" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Ascaris suum]] | [[Category: Ascaris suum]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Coleman DE]] | |||
[[Category: Coleman | [[Category: Cook PF]] | ||
[[Category: Cook | [[Category: Goldsmith EJ]] | ||
[[Category: Goldsmith | [[Category: Harris BG]] | ||
[[Category: Harris | [[Category: Jagannatha GS]] | ||
[[Category: Jagannatha | |||