View source for 1iq4


==5S-RRNA BINDING RIBOSOMAL PROTEIN L5 FROM BACILLUS STEAROTHERMOPHILUS==
<StructureSection load='1iq4' size='340' side='right'caption='[[1iq4]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1iq4]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_12980 Atcc 12980]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1IQ4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1IQ4 FirstGlance]. <br>
</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=1iq4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1iq4 OCA], [https://pdbe.org/1iq4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1iq4 RCSB], [https://www.ebi.ac.uk/pdbsum/1iq4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1iq4 ProSAT]</span></td></tr>
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== Function ==
[[https://www.uniprot.org/uniprot/RL5_GEOSE RL5_GEOSE]] This is 1 of the proteins that binds and probably mediates the attachment of the 5S RNA into the large ribosomal subunit, where it forms part of the central protuberance. In the 70S ribosome it contacts protein S13 of the 30S subunit (bridge B1b), connecting the 2 subunits; this bridge is implicated in subunit movement. Contacts the P site tRNA; the 5S rRNA and some of its associated proteins might help stabilize positioning of ribosome-bound tRNAs (By similarity). 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/iq/1iq4_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</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=1iq4 ConSurf].
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== Publication Abstract from PubMed ==
Ribosomal protein L5 is a 5S rRNA binding protein in the large subunit and plays an essential role in the promotion of a particular conformation of 5S rRNA. The crystal structure of the ribosomal protein L5 from Bacillus stearothermophilus has been determined at 1.8 A resolution. The molecule consists of a five-stranded antiparallel beta-sheet and four alpha-helices, which fold in a way that is topologically similar to the ribonucleoprotein (RNP) domain. The molecular shape and electrostatic representation suggest that the concave surface and loop regions are involved in 5S rRNA binding. To identify amino acid residues responsible for 5S rRNA binding, we made use of Ala-scanning mutagenesis of evolutionarily conserved amino acids occurring in the beta-strands and loop regions. The mutations of Asn37 at the beta1-strand and Gln63 at the loop between helix 2 and beta3-strand as well as that of Phe77 at the tip of the loop structure between the beta2- and beta3-strands caused a significant reduction in 5S rRNA binding. In addition, the mutations of Thr90 on the beta3-strand and Ile141 and Asp144 at the loop between beta4- and beta5-strands moderately reduced the 5S rRNA-binding affinity. Comparison of these results with the more recently analyzed structure of the 50S subunit from Haloarcula marismortui suggests that there are significant differences in the structure at N- and C-terminal regions and probably in the 5S rRNA binding.

Ribosomal protein L5 has a highly twisted concave surface and flexible arms responsible for rRNA binding.,Nakashima T, Yao M, Kawamura S, Iwasaki K, Kimura M, Tanaka I RNA. 2001 May;7(5):692-701. PMID:11350033<ref>PMID:11350033</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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==See Also==
*[[Ribosomal protein L5|Ribosomal protein L5]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Atcc 12980]]
[[Category: Large Structures]]
[[Category: Iwasaki, K]]
[[Category: Kawamura, S]]
[[Category: Kimura, M]]
[[Category: Nakashima, T]]
[[Category: Tanaka, I]]
[[Category: Yao, M]]
[[Category: Ribosomal protein]]
[[Category: Rna binding protein]]
[[Category: Rnp motif]]
[[Category: Rrna-binding]]