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[[Image:1gsa.gif|left|200px]]<br /><applet load="1gsa" size="350" color="white" frame="true" align="right" spinBox="true"
caption="1gsa, resolution 2.0&Aring;" />
'''STRUCTURE OF GLUTATHIONE SYNTHETASE COMPLEXED WITH ADP AND GLUTATHIONE'''<br />


==Overview==
==STRUCTURE OF GLUTATHIONE SYNTHETASE COMPLEXED WITH ADP AND GLUTATHIONE==
The crystal structure of glutathione synthetase from Escherichia coli B complexed with ADP, glutathione, and sulfate has been determined at 2.0 A resolution. Concerning the chemical similarity of sulfate and phosphate, this quaternary complex structure represents a pseudo enzyme-substrate complex in the reverse reaction and consequently allows us to understand the active site architecture of the E. coli glutathione synthetase. Two Mg2+ ions are coordinated with oxygen atoms from the alpha- and beta-phosphate groups of ADP and from the sulfate ion. The flexible loops, invisible in the unliganded or the binary and ternary complex structures, are fixed in the quaternary complex. The larger flexible loop (Ile226-Arg241) includes one turn of a 310-helix that comprises the binding site of the glycine moiety of GSH. The small loop (Gly164-Gly167) is involved in nucleotide binding and acts as a phosphate gripper. The side chains of Arg210 and Arg225 interact with the sulfate ion and the beta-phosphate moiety of ADP. Arg 210 is likely to interact with the carboxylate of the C-terminal gamma-glutamylcysteine in the substrate-binding form of the forward reaction. Other positively charged residues in the active site (Lys125 and Lys160) are involved in nucleotide binding, directing the phosphate groups to the right position for catalysis. Functional aspects of the active site architecture in the substrate-binding form are discussed.
<StructureSection load='1gsa' size='340' side='right'caption='[[1gsa]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1gsa]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_B Escherichia coli B]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GSA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1GSA 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&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=GSH:GLUTATHIONE'>GSH</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=1gsa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1gsa OCA], [https://pdbe.org/1gsa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1gsa RCSB], [https://www.ebi.ac.uk/pdbsum/1gsa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1gsa ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GSHB_ECOLI GSHB_ECOLI]
== 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/gs/1gsa_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=1gsa ConSurf].
<div style="clear:both"></div>


==About this Structure==
==See Also==
1GSA is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with <scene name='pdbligand=MG:'>MG</scene>, <scene name='pdbligand=SO4:'>SO4</scene>, <scene name='pdbligand=ADP:'>ADP</scene> and <scene name='pdbligand=GTT:'>GTT</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Glutathione_synthase Glutathione synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.2.3 6.3.2.3] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GSA OCA].
*[[Glutathione synthetase|Glutathione synthetase]]
 
__TOC__
==Reference==
</StructureSection>
A pseudo-michaelis quaternary complex in the reverse reaction of a ligase: structure of Escherichia coli B glutathione synthetase complexed with ADP, glutathione, and sulfate at 2.0 A resolution., Hara T, Kato H, Katsube Y, Oda J, Biochemistry. 1996 Sep 17;35(37):11967-74. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=8810901 8810901]
[[Category: Escherichia coli B]]
[[Category: Escherichia coli]]
[[Category: Large Structures]]
[[Category: Glutathione synthase]]
[[Category: Hara T]]
[[Category: Single protein]]
[[Category: Kato H]]
[[Category: Hara, T.]]
[[Category: Katsube Y]]
[[Category: Kato, H.]]
[[Category: Nishioka T]]
[[Category: Katsube, Y.]]
[[Category: Oda J]]
[[Category: Nishioka, T.]]
[[Category: Oda, J.]]
[[Category: ADP]]
[[Category: GTT]]
[[Category: MG]]
[[Category: SO4]]
[[Category: glutathione synthetase]]
[[Category: ligase]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:53:25 2008''

Latest revision as of 10:26, 7 February 2024

STRUCTURE OF GLUTATHIONE SYNTHETASE COMPLEXED WITH ADP AND GLUTATHIONESTRUCTURE OF GLUTATHIONE SYNTHETASE COMPLEXED WITH ADP AND GLUTATHIONE

Structural highlights

1gsa is a 1 chain structure with sequence from Escherichia coli B. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2Å
Ligands:, , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

GSHB_ECOLI

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

1gsa, resolution 2.00Å

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