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1dru

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[[Image:1dru.gif|left|200px]]
 
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{{Structure
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==ESCHERICHIA COLI DHPR/NADH COMPLEX==
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|PDB= 1dru |SIZE=350|CAPTION= <scene name='initialview01'>1dru</scene>, resolution 2.2&Aring;
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<StructureSection load='1dru' size='340' side='right'caption='[[1dru]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
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|SITE= <scene name='pdbsite=BIN:Dinucleotide+Binding+Site'>BIN</scene>
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene>
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<table><tr><td colspan='2'>[[1dru]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DRU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DRU FirstGlance]. <br>
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Dihydrodipicolinate_reductase Dihydrodipicolinate reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.3.1.26 1.3.1.26] </span>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2&#8491;</td></tr>
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|GENE= DAPB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 Escherichia coli])
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<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>
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|DOMAIN=
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1dru FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dru OCA], [https://pdbe.org/1dru PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dru RCSB], [https://www.ebi.ac.uk/pdbsum/1dru PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dru ProSAT]</span></td></tr>
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|RELATEDENTRY=
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</table>
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1dru FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dru OCA], [http://www.ebi.ac.uk/pdbsum/1dru PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1dru RCSB]</span>
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== Function ==
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}}
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[https://www.uniprot.org/uniprot/DAPB_ECOLI DAPB_ECOLI] Catalyzes the conversion of 4-hydroxy-tetrahydrodipicolinate (HTPA) to tetrahydrodipicolinate. Can use both NADH and NADPH as a reductant, with NADH being twice as effective as NADPH.<ref>PMID:7893644</ref> <ref>PMID:20503968</ref>
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== Evolutionary Conservation ==
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'''ESCHERICHIA COLI DHPR/NADH COMPLEX'''
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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==Overview==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dr/1dru_consurf.spt"</scriptWhenChecked>
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E. coli dihydrodipicolinate reductase exhibits unusual nucleotide specificity, with NADH being kinetically twice as effective as NADPH as a reductant as evidenced by their relative V/K values. To investigate the nature of the interactions which determine this specificity, we performed isothermal titration calorimetry to determine the thermodynamic parameters of binding and determined the three-dimensional structures of the corresponding enzyme-nucleotide complexes. The thermodynamic binding parameters for NADPH and NADH were determined to be Kd = 2.12 microM, delta G degree = -7.81 kcal mol-1, delta H degree = -10.98 kcal mol-1, and delta S degree = -10.5 cal mol-1 deg-1 and Kd = 0.46 microM, delta G degree = -8.74 kcal mol-1, delta H degree = -8.93 kcal mol-1, and delta S degree = 0.65 cal mol-1 deg-1, respectively. The structures of DHPR complexed with these nucleotides have been determined at 2.2 A resolution. The 2'-phosphate of NADPH interacts electrostatically with Arg39, while in the NADH complex this interaction is replaced by hydrogen bonds between the 2' and 3' adenosyl ribose hydroxyls and Glu38. Similar studies were also performed with other pyridine nucleotide substrate analogs to determine the contributions of individual groups on the nucleotide to the binding affinity and enthalpic and entropic components of the free energy of binding, delta G degree. Analogs lacking the 2'-phosphate containing homologs. For all analogs, the total binding free energy can be shown to include compensating enthalpic and entropic contributions to the association constants. The entropy contribution appears to play a more important role in the binding of the nonphosphorylated analogs than in the binding of the phosphorylated analogs.
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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==About this Structure==
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</jmolCheckbox>
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1DRU is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DRU OCA].
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</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=1dru ConSurf].
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<div style="clear:both"></div>
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==Reference==
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== References ==
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Interaction of pyridine nucleotide substrates with Escherichia coli dihydrodipicolinate reductase: thermodynamic and structural analysis of binary complexes., Reddy SG, Scapin G, Blanchard JS, Biochemistry. 1996 Oct 15;35(41):13294-302. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8873595 8873595]
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<references/>
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[[Category: Dihydrodipicolinate reductase]]
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__TOC__
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</StructureSection>
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Blanchard, J S.]]
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[[Category: Blanchard JS]]
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[[Category: Reddy, S G.]]
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[[Category: Reddy SG]]
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[[Category: Scapin, G.]]
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[[Category: Scapin G]]
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[[Category: oxidoreductase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 19:47:23 2008''
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Current revision

ESCHERICHIA COLI DHPR/NADH COMPLEX

PDB ID 1dru

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