1m8f: Difference between revisions

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-[[Image:1m8f.png|left|200px]]
+==Crystal Structure Of Methanobacterium Thermoautotrophicum Nicotinamide Mononucleotide Adenylyltransferase Mutant R11A complexed with NAD==
+<StructureSection load='1m8f' size='340' side='right' caption='[[1m8f]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[1m8f]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Methanothermobacter_thermautotrophicus Methanothermobacter thermautotrophicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M8F OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1M8F FirstGlance]. <br>
+</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene><br>
+<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1m8g|1m8g]], [[1m8j|1m8j]], [[1m8k|1m8k]]</td></tr>
+<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">mth150 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=145262 Methanothermobacter thermautotrophicus])</td></tr>
+<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Nicotinamide-nucleotide_adenylyltransferase Nicotinamide-nucleotide adenylyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.1 2.7.7.1] </span></td></tr>
+<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1m8f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m8f OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1m8f RCSB], [http://www.ebi.ac.uk/pdbsum/1m8f PDBsum]</span></td></tr>
+<table>
+== 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/m8/1m8f_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/chain_selection.php?pdb_ID=2ata ConSurf].
+<div style="clear:both"></div>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Several residues lining the ATP-binding site of Methanobacterium thermoautotrophicum nicotinamide mononucleotide adenylyltransferase (NMNATase) were mutated in an effort to better characterize their roles in substrate binding and catalysis. Residues selected were Arg-11 and Arg-136, both of which had previously been implicated as substrate binding residues, as well as His-16 and His-19, part of the HXGH active site motif and postulated to be of importance in catalysis. Kinetic studies revealed that both Arg-11 and Arg-136 contributed to the binding of the substrate, ATP. When these amino acids were replaced by lysines, the apparent Km values of the respective mutants for ATP decreased by factors of 1.3 and 2.9 and by factors of 1.9 and 8.8 when the same residues were changed to alanines. All four Arg mutants displayed unaltered Km values for NMN. The apparent kcat values of the R11K and R136K mutants were the same as those of WT NMNATase but the apparent kcat values of the alanine mutants had decreased. Crystal structures of the Arg mutants revealed NAD+ and SO42- molecules trapped at their active sites. The binding interactions of NAD+ were unchanged but the binding of SO42- was altered in these mutants compared with wild type. The alanine mutants at positions His-16 and His-19 retained approximately 6 and 1.3%, respectively, of WT NMNATase activity indicating that His-19 is a key catalytic group. Surprisingly, this H19A mutant displayed a novel and distinct mode of NAD+ binding when co-crystallized in the presence of NAD+ and SO42-.
-{{STRUCTURE_1m8f|  PDB=1m8f  |  SCENE=  }}
+Mutational, structural, and kinetic studies of the ATP-binding site of Methanobacterium thermoautotrophicum nicotinamide mononucleotide adenylyltransferase.,Saridakis V, Pai EF J Biol Chem. 2003 Sep 5;278(36):34356-63. Epub 2003 Jun 16. PMID:12810729<ref>PMID:12810729</ref>
-===Crystal Structure Of Methanobacterium Thermoautotrophicum Nicotinamide Mononucleotide Adenylyltransferase Mutant R11A complexed with NAD===
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
+</div>
-{{ABSTRACT_PUBMED_12810729}}
+== References ==
+<references/>
-==About this Structure==
+__TOC__
-[[1m8f]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Methanothermobacter_thermautotrophicus Methanothermobacter thermautotrophicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M8F OCA].
+</StructureSection>
-==Reference==
-<ref group="xtra">PMID:012810729</ref><references group="xtra"/>
 [[Category: Methanothermobacter thermautotrophicus]]
 [[Category: Nicotinamide-nucleotide adenylyltransferase]]