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1eh1

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(New page: 200px<br /><applet load="1eh1" size="450" color="white" frame="true" align="right" spinBox="true" caption="1eh1, resolution 2.6&Aring;" /> '''RIBOSOME RECYCLING FA...)
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[[Image:1eh1.gif|left|200px]]<br /><applet load="1eh1" size="450" color="white" frame="true" align="right" spinBox="true"
 
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caption="1eh1, resolution 2.6&Aring;" />
 
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'''RIBOSOME RECYCLING FACTOR FROM THERMUS THERMOPHILUS'''<br />
 
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==Overview==
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==RIBOSOME RECYCLING FACTOR FROM THERMUS THERMOPHILUS==
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Ribosome recycling factor (RRF), in concert with elongation factor EF-G, is required for disassembly of the posttermination complex of the ribosome, after release of polypeptides. The crystal structure of Thermus, thermophilus RRF was determined at 2.6 A resolution. It is a tRNA-like, L-shaped molecule consisting of two domains: a long three-helix bundle, (domain 1) and a three-layer beta/alpha/beta sandwich (domain 2). Although, the individual domain structures are similar to those of Thermotoga, maritima RRF (Selmer et al., Science, 1999, 286:2349-2352), the, interdomain angle differs by 33 degrees in two molecules, suggesting that, the hinge between two domains is potentially flexible and responsive to, different conditions of crystal packing. The hinge connects hydrophobic, junctions of domains 1 and 2. The structure-based genetic analysis, revealed the strong correlation between the hinge flexibility and the in, vivo function of RRF. First, altering the hinge flexibility by making, alanine or serine substitutions for large-size residues conserved at the, hinge loop and nearby in domain 1 frequently gave rise to gain of function, except a Pro residue conserved at the hinge loop. Second, the hinge defect, resulting from a too relaxed hinge structure can be compensated for by, secondary alterations in domain 1 that seem to increase the hydrophobic, contact between domain 1 and the hinge loop. These results show that the, hinge flexibility is vital for the function of RRF and that the steric, interaction between the hinge loop and domains 1 and 2 restricts the, interdomain angle and/or the hinge flexibility. These results indicate, that RRF possesses an architectural difference from tRNA regardless of a, resemblance to tRNA shape: RRF has a "gooseneck" elbow, whereas the tRNA, elbow is rigid, and the direction of flex of RRF and tRNA is at a nearly, right angle to each other. Moreover, surface electrostatic potentials of, the two RRF proteins are dissimilar and do not mimic the surface potential, of tRNA or EF-G. These properties will add a new insight into RRF, suggesting that RRF is more than a simple tRNA mimic.
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<StructureSection load='1eh1' size='340' side='right'caption='[[1eh1]], [[Resolution|resolution]] 2.60&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1eh1]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EH1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EH1 FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.6&#8491;</td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1eh1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eh1 OCA], [https://pdbe.org/1eh1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1eh1 RCSB], [https://www.ebi.ac.uk/pdbsum/1eh1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1eh1 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/RRF_THET8 RRF_THET8] Responsible for the release of ribosomes from messenger RNA at the termination of protein biosynthesis. May increase the efficiency of translation by recycling ribosomes from one round of translation to another (By similarity).
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/eh/1eh1_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1eh1 ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1EH1 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://ispc.weizmann.ac.il/oca-bin/ocashort?id=1EH1 OCA].
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*[[Ribosome recycling factor|Ribosome recycling factor]]
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__TOC__
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==Reference==
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</StructureSection>
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Crystal structure combined with genetic analysis of the Thermus thermophilus ribosome recycling factor shows that a flexible hinge may act as a functional switch., Toyoda T, Tin OF, Ito K, Fujiwara T, Kumasaka T, Yamamoto M, Garber MB, Nakamura Y, RNA. 2000 Oct;6(10):1432-44. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=11073219 11073219]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Thermus thermophilus]]
[[Category: Thermus thermophilus]]
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[[Category: Fujiwara, T.]]
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[[Category: Fujiwara T]]
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[[Category: Garber, M.B.]]
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[[Category: Garber MB]]
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[[Category: Ito, K.]]
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[[Category: Ito K]]
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[[Category: Kumasaka, T.]]
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[[Category: Kumasaka T]]
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[[Category: Nakamura, Y.]]
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[[Category: Nakamura Y]]
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[[Category: Tin, O.F.]]
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[[Category: Tin OF]]
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[[Category: Toyoda, T.]]
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[[Category: Toyoda T]]
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[[Category: Yamamoto, M.]]
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[[Category: Yamamoto M]]
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[[Category: hinge variability]]
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[[Category: ribosome]]
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[[Category: translation]]
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''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 14:00:01 2007''
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Current revision

RIBOSOME RECYCLING FACTOR FROM THERMUS THERMOPHILUS

PDB ID 1eh1

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