View source for 4l71


==Crystal Structure of Frameshift Suppressor tRNA SufA6 Bound to Codon CCC-A on the Ribosome==
<StructureSection load='4l71' size='340' side='right'caption='[[4l71]], [[Resolution|resolution]] 3.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4l71]] is a 20 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus_HB8 Thermus thermophilus HB8]. This structure supersedes the now removed PDB entries [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1vvp 1vvp], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1vvq 1vvq], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1vvr 1vvr] and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1vvs 1vvs]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4L71 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4L71 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]] 3.900001&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=1MG:1N-METHYLGUANOSINE-5-MONOPHOSPHATE'>1MG</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PAR:PAROMOMYCIN'>PAR</scene>, <scene name='pdbligand=PPU:PUROMYCIN-5-MONOPHOSPHATE'>PPU</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=4l71 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4l71 OCA], [https://pdbe.org/4l71 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4l71 RCSB], [https://www.ebi.ac.uk/pdbsum/4l71 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4l71 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/RS2_THET8 RS2_THET8] Spans the head-body hinge region of the 30S subunit. Is loosely associated with the 30S subunit.[HAMAP-Rule:MF_00291_B]
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Maintenance of the correct reading frame on the ribosome is essential for accurate protein synthesis. Here, we report structures of the 70S ribosome bound to frameshift suppressor tRNASufA6 and N1-methylguanosine at position 37 (m1G37) modification-deficient anticodon stem loopPro, both of which cause the ribosome to decode 4 rather than 3 nucleotides, resulting in a +1 reading frame. Our results reveal that decoding at +1 suppressible codons causes suppressor tRNASufA6 to undergo a rearrangement of its 5' stem that destabilizes U32, thereby disrupting the conserved U32-A38 base pair. Unexpectedly, the removal of the m1G37 modification of tRNAPro also disrupts U32-A38 pairing in a structurally analogous manner. The lack of U32-A38 pairing provides a structural correlation between the transition from canonical translation and a +1 reading of the mRNA. Our structures clarify the molecular mechanism behind suppressor tRNA-induced +1 frameshifting and advance our understanding of the role played by the ribosome in maintaining the correct translational reading frame.

Structural insights into +1 frameshifting promoted by expanded or modification-deficient anticodon stem loops.,Maehigashi T, Dunkle JA, Miles SJ, Dunham CM Proc Natl Acad Sci U S A. 2014 Aug 15. pii: 201409436. PMID:25128388<ref>PMID:25128388</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4l71" style="background-color:#fffaf0;"></div>

==See Also==
*[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermus thermophilus HB8]]
[[Category: Dunham CM]]
[[Category: Dunkle JA]]
[[Category: Maehigashi T]]