6tnh: Difference between revisions

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-'''Unreleased structure'''
-The entry 6tnh is ON HOLD  until Paper Publication
+==Deoxyguanylosuccinate synthase (DgsS) quaternary structure with AMPPcP, dGMP, Asp, Magnesium at 2.21 Angstrom resolution==
+<StructureSection load='6tnh' size='340' side='right'caption='[[6tnh]], [[Resolution|resolution]] 2.21&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[6tnh]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Vibrio_phage_phiVC8 Vibrio phage phiVC8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6TNH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6TNH 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]] 2.21&#8491;</td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACP:PHOSPHOMETHYLPHOSPHONIC+ACID+ADENYLATE+ESTER'>ACP</scene>, <scene name='pdbligand=ASP:ASPARTIC+ACID'>ASP</scene>, <scene name='pdbligand=DGP:2-DEOXYGUANOSINE-5-MONOPHOSPHATE'>DGP</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=6tnh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6tnh OCA], [https://pdbe.org/6tnh PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6tnh RCSB], [https://www.ebi.ac.uk/pdbsum/6tnh PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6tnh ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/PURZ_BPVC8 PURZ_BPVC8] Involved in the synthesis of the atypical nucleotide dZTP (2-amino-2'-deoxyadenosine-5'-triphosphate) (PubMed:33926954). Catalyzes the condensation of aspartate with deoxyguanylate into dSMP (N6-succino-2-amino-2'-deoxyadenylate), which undergoes defumarylation and phosphorylation respectively by host PurB and guanylate/nucleoside diphosphate kinases to give dZTP (PubMed:33926955). dZTP is integrated into the viral genome instead of adenine by the viral DNA polymerase. This Z-base probably completely replaces adenosine and forms a triple bond to the opposite T-base (PubMed:33926955). The resulting non-standard viral DNA is called Z-genome (PubMed:33926955). The chemically modified DNA is probably harder for the host bacteria to digest with nucleases or restriction enzymes (Probable).[HAMAP-Rule:MF_04166]<ref>PMID:33926954</ref> <ref>PMID:33926955</ref>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Cells have two purine pathways that synthesize adenine and guanine ribonucleotides from phosphoribose via inosylate. A chemical hybrid between adenine and guanine, 2-aminoadenine (Z), replaces adenine in the DNA of the cyanobacterial virus S-2L. We show that S-2L and Vibrio phage PhiVC8 encode a third purine pathway catalyzed by PurZ, a distant paralog of succinoadenylate synthase (PurA), the enzyme condensing aspartate and inosylate in the adenine pathway. PurZ condenses aspartate with deoxyguanylate into dSMP (N6-succino-2-amino-2'-deoxyadenylate), which undergoes defumarylation and phosphorylation to give dZTP (2-amino-2'-deoxyadenosine-5'-triphosphate), a substrate for the phage DNA polymerase. Crystallography and phylogenetics analyses indicate a close relationship between phage PurZ and archaeal PurA enzymes. Our work elucidates the biocatalytic innovation that remodeled a DNA building block beyond canonical molecular biology.
-Authors: Sleiman, D., Loc'h, J., Haouz, A., Kaminski, P.A.
+A third purine biosynthetic pathway encoded by aminoadenine-based viral DNA genomes.,Sleiman D, Garcia PS, Lagune M, Loc'h J, Haouz A, Taib N, Rothlisberger P, Gribaldo S, Marliere P, Kaminski PA Science. 2021 Apr 30;372(6541):516-520. doi: 10.1126/science.abe6494. PMID:33926955<ref>PMID:33926955</ref>
-Description: Deoxyguanylosuccinate synthase (DgsS) quaternary structure with AMPPcP, dGMP, Asp, Magnesium at 2.21 Angstrom resolution
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
-[[Category: Unreleased Structures]]
+</div>
-[[Category: Loc'H, J]]
+<div class="pdbe-citations 6tnh" style="background-color:#fffaf0;"></div>
-[[Category: Kaminski, P.A]]
-[[Category: Sleiman, D]]
+==See Also==
-[[Category: Haouz, A]]
+*[[Adenylosuccinate synthetase 3D structures|Adenylosuccinate synthetase 3D structures]]
+== References ==
+<references/>
+__TOC__
+</StructureSection>
+[[Category: Large Structures]]
+[[Category: Vibrio phage phiVC8]]
+[[Category: Haouz A]]
+[[Category: Kaminski PA]]
+[[Category: Loc'h J]]
+[[Category: Sleiman D]]