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==Structure of the Archaeal GTP:AdoCbi-P Guanylyltransferase (CobY) from Methanocaldococcus jannaschii==
==Structure of the Archaeal GTP:AdoCbi-P Guanylyltransferase (CobY) from Methanocaldococcus jannaschii==
<StructureSection load='3rsb' size='340' side='right' caption='[[3rsb]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
<StructureSection load='3rsb' size='340' side='right'caption='[[3rsb]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3rsb]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_43067 Atcc 43067]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RSB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3RSB FirstGlance]. <br>
<table><tr><td colspan='2'>[[3rsb]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Methanocaldococcus_jannaschii Methanocaldococcus jannaschii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RSB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RSB FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cobY, MJ1117 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2190 ATCC 43067])</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=3rsb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rsb OCA], [https://pdbe.org/3rsb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rsb RCSB], [https://www.ebi.ac.uk/pdbsum/3rsb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rsb ProSAT]</span></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Adenosylcobinamide-phosphate_guanylyltransferase Adenosylcobinamide-phosphate guanylyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.7.62 2.7.7.62] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3rsb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rsb OCA], [http://pdbe.org/3rsb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3rsb RCSB], [http://www.ebi.ac.uk/pdbsum/3rsb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3rsb ProSAT]</span></td></tr>
</table>
</table>
== Function ==
== Function ==
[[http://www.uniprot.org/uniprot/COBY_METJA COBY_METJA]] Guanylyltransferase that catalyzes the synthesis of adenosylcobinamide-GDP (AdoCbi-GDP) from adenosylcobinamide-phosphate (AdoCbi-P) and GTP. Is involved in adenosylcobalamin biosynthesis. Binds one GTP per dimer. Can not use other NTPs or GDP. Does not display AdoCbi kinase activity. Is also able to catalyze the condensation of 2-phospho-L-lactate (LP) with GTP in vitro to form PPi and (2S)-lactyl-2-diphospho-5'-guanosine (LPPG), but is much less efficient than CofC, the presumed enzyme catalyzing this reaction in vivo.<ref>PMID:18260642</ref> <ref>PMID:19489548</ref>
[https://www.uniprot.org/uniprot/COBY_METJA COBY_METJA] Guanylyltransferase that catalyzes the synthesis of adenosylcobinamide-GDP (AdoCbi-GDP) from adenosylcobinamide-phosphate (AdoCbi-P) and GTP. Is involved in adenosylcobalamin biosynthesis. Binds one GTP per dimer. Can not use other NTPs or GDP. Does not display AdoCbi kinase activity. Is also able to catalyze the condensation of 2-phospho-L-lactate (LP) with GTP in vitro to form PPi and (2S)-lactyl-2-diphospho-5'-guanosine (LPPG), but is much less efficient than CofC, the presumed enzyme catalyzing this reaction in vivo.<ref>PMID:18260642</ref> <ref>PMID:19489548</ref>  
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== Publication Abstract from PubMed ==
== Publication Abstract from PubMed ==
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Adenosylcobinamide-phosphate guanylyltransferase]]
[[Category: Large Structures]]
[[Category: Atcc 43067]]
[[Category: Methanocaldococcus jannaschii]]
[[Category: Escalante-Semerena, J C]]
[[Category: Escalante-Semerena JC]]
[[Category: Newmister, S A]]
[[Category: Newmister SA]]
[[Category: Otte, M M]]
[[Category: Otte MM]]
[[Category: Rayment, I]]
[[Category: Rayment I]]
[[Category: Pyrophosphorylase]]
[[Category: Pyrophosphorylase binding motif]]
[[Category: Transferase]]

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