View source for 6nke


==Wild-type GGGPS from Thermoplasma volcanium==
<StructureSection load='6nke' size='340' side='right'caption='[[6nke]], [[Resolution|resolution]] 1.72&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6nke]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermoplasma_volcanium_GSS1 Thermoplasma volcanium GSS1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6NKE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6NKE 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]] 1.72&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=IMD:IMIDAZOLE'>IMD</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=6nke FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6nke OCA], [https://pdbe.org/6nke PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6nke RCSB], [https://www.ebi.ac.uk/pdbsum/6nke PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6nke ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GGGPS_THEVO GGGPS_THEVO] Prenyltransferase that catalyzes the transfer of the geranylgeranyl moiety of geranylgeranyl diphosphate (GGPP) to the C3 hydroxyl of sn-glycerol-1-phosphate (G1P). This reaction is the first ether-bond-formation step in the biosynthesis of archaeal membrane lipids.[HAMAP-Rule:MF_00112]
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== Publication Abstract from PubMed ==
Archaea are uniquely adapted to thrive in harsh environments, and one of these adaptations involves the archaeal membrane lipids, which are characterized by their isoprenoid alkyl chains connected via ether linkages to glycerol 1-phosphate. The membrane lipids of the thermophilic and acidophilic euryarchaeota Thermoplasma volcanium are exclusively glycerol dibiphytanyl glycerol tetraethers. The first committed step in the biosynthetic pathway of these archaeal lipids is the formation of the ether linkage between glycerol 1-phosphate and geranylgeranyl diphosphate, and is catalyzed by the enzyme geranylgeranylglyceryl phosphate synthase (GGGPS). The 1.72 A resolution crystal structure of GGGPS from T. volcanium (TvGGGPS) in complex with glycerol and sulfate is reported here. The crystal structure reveals TvGGGPS to be a dimer, which is consistent with the absence of the aromatic anchor residue in helix alpha5a that is required for hexamerization in other GGGPS homologs; the hexameric quaternary structure in GGGPS is thought to provide thermostability. A phylogenetic analysis of the Euryarchaeota and a parallel ancestral state reconstruction investigated the relationship between optimal growth temperature and the ancestral sequences. The presence of an aromatic anchor residue is not explained by temperature as an ecological parameter. An examination of the active site of the TvGGGPS dimer revealed that it may be able to accommodate longer isoprenoid substrates, supporting an alternative pathway of isoprenoid membrane-lipid synthesis.

Structural studies of geranylgeranylglyceryl phosphate synthase, a prenyltransferase found in thermophilic Euryarchaeota.,Blank PN, Barnett AA, Ronnebaum TA, Alderfer KE, Gillott BN, Christianson DW, Himmelberger JA Acta Crystallogr D Struct Biol. 2020 Jun 1;76(Pt 6):542-557. doi:, 10.1107/S2059798320004878. Epub 2020 May 29. PMID:32496216<ref>PMID:32496216</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6nke" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermoplasma volcanium GSS1]]
[[Category: Alderfer KE]]
[[Category: Blank PN]]
[[Category: Christianson DW]]
[[Category: Gillott BN]]
[[Category: Himmelberger JA]]