6h42: Difference between revisions

<StructureSection load='6h42' size='340' side='right'caption='[[6h42]], [[Resolution|resolution]] 2.45&Aring;' scene=''>

<table><tr><td colspan='2'>[[6h42]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6H42 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6H42 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]] 2.45&#8491;</td></tr>

<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BR:BROMIDE+ION'>BR</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GLU:GLUTAMIC+ACID'>GLU</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=6h42 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6h42 OCA], [https://pdbe.org/6h42 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6h42 RCSB], [https://www.ebi.ac.uk/pdbsum/6h42 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6h42 ProSAT]</span></td></tr>

[https://www.uniprot.org/uniprot/TGT_HUMAN TGT_HUMAN] Catalytic subunit of the queuine tRNA-ribosyltransferase (TGT) that catalyzes the base-exchange of a guanine (G) residue with queuine (Q) at position 34 (anticodon wobble position) in tRNAs with GU(N) anticodons (tRNA-Asp, -Asn, -His and -Tyr), resulting in the hypermodified nucleoside queuosine (7-(((4,5-cis-dihydroxy-2-cyclopenten-1-yl)amino)methyl)-7-deazaguanosine) (PubMed:11255023, PubMed:20354154). Catalysis occurs through a double-displacement mechanism. The nucleophile active site attacks the C1' of nucleotide 34 to detach the guanine base from the RNA, forming a covalent enzyme-RNA intermediate. The proton acceptor active site deprotonates the incoming queuine, allowing a nucleophilic attack on the C1' of the ribose to form the product (By similarity).[UniProtKB:P28720][HAMAP-Rule:MF_03218]<ref>PMID:11255023</ref> <ref>PMID:20354154</ref>  

[[Category: Homo sapiens]]

[[Category: Large Structures]]

[[Category: Ficner R]]

[[Category: Johannsson S]]

[[Category: Neumann P]]