1gr1: Difference between revisions
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== | ==Structure of Ferredoxin-NADP+ Reductase with Glu 139 replaced by Lys (E139K)== | ||
The role of the negative charge of the E139 side-chain of Anabaena | <StructureSection load='1gr1' size='340' side='right'caption='[[1gr1]], [[Resolution|resolution]] 2.50Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1gr1]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Nostoc_sp._PCC_7119 Nostoc sp. PCC 7119]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GR1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GR1 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]] 2.5Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=1gr1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gr1 OCA], [https://pdbe.org/1gr1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gr1 RCSB], [https://www.ebi.ac.uk/pdbsum/1gr1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gr1 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/FENR_NOSSO FENR_NOSSO] | |||
== 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/gr/1gr1_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=1gr1 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The role of the negative charge of the E139 side-chain of Anabaena Ferredoxin-NADP+ reductase (FNR) in steering appropriate docking with its substrates ferredoxin, flavodoxin and NADP+/H, that leads to efficient electron transfer (ET) is analysed by characterization of several E139 FNR mutants. Replacement of E139 affects the interaction with the different FNR substrates in very different ways. Thus, while E139 does not appear to be involved in the processes of binding and ET between FNR and NADP+/H, the nature and the conformation of the residue at position 139 of Anabaena FNR modulates the precise enzyme interaction with the protein carriers ferredoxin (Fd) and flavodoxin (Fld). Introduction of the shorter aspartic acid side-chain at position 139 produces an enzyme that interacts more weakly with both ET proteins. Moreover, the removal of the charge, as in the E139Q mutant, or the charge-reversal mutation, as in E139K FNR, apparently enhances additional interaction modes of the enzyme with Fd, and reduces the possible orientations with Fld to more productive and stronger ones. Hence, removal of the negative charge at position 139 of Anabaena FNR produces a deleterious effect in its ET reactions with Fd whereas it appears to enhance the ET processes with Fld. Significantly, a large structural variation is observed for the E139 side-chain conformer in different FNR structures, including the E139K mutant. In this case, a positive potential region replaces a negative one in the wild-type enzyme. Our observations further confirm the contribution of both attractive and repulsive interactions in achieving the optimal orientation for efficient ET between FNR and its protein carriers. | |||
Probing the role of glutamic acid 139 of Anabaena ferredoxin-NADP+ reductase in the interaction with substrates.,Faro M, Frago S, Mayoral T, Hermoso JA, Sanz-Aparicio J, Gomez-Moreno C, Medina M Eur J Biochem. 2002 Oct;269(20):4938-47. PMID:12383252<ref>PMID:12383252</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
[[Category: | <div class="pdbe-citations 1gr1" style="background-color:#fffaf0;"></div> | ||
[[Category: | == References == | ||
<references/> | |||
[[Category: Gomez-Moreno | __TOC__ | ||
[[Category: Hermoso | </StructureSection> | ||
[[Category: Mayoral | [[Category: Large Structures]] | ||
[[Category: Medina | [[Category: Nostoc sp. PCC 7119]] | ||
[[Category: Sanz-Aparicio | [[Category: Gomez-Moreno C]] | ||
[[Category: Hermoso JA]] | |||
[[Category: Mayoral T]] | |||
[[Category: Medina M]] | |||
[[Category: Sanz-Aparicio J]] | |||