1c9s

<table><tr><td colspan='2'>[[1c9s]] is a 23 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_12980 Atcc 12980]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1C9S OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1C9S FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=TRP:TRYPTOPHAN'>TRP</scene></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1c9s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1c9s OCA], [http://pdbe.org/1c9s PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1c9s RCSB], [http://www.ebi.ac.uk/pdbsum/1c9s PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1c9s ProSAT]</span></td></tr>

<div style="background-color:#fffaf0;">

== Publication Abstract from PubMed ==

The trp RNA-binding attenuation protein (TRAP) regulates expression of the tryptophan biosynthetic genes of several bacilli by binding single-stranded RNA. The binding sequence is composed of eleven triplet repeats, predominantly GAG, separated by two or three non-conserved nucleotides. Here we present the crystal structure of a complex of TRAP and a 53-base single-stranded RNA containing eleven GAG triplets, revealing that each triplet is accommodated in a binding pocket formed by beta-strands. In the complex, the RNA has an extended structure without any base-pairing and binds to the protein mostly by specific protein-base interactions. Eleven binding pockets on the circular TRAP 11-mer form a belt with a diameter of about 80 A. This simple but elegant mechanism of arresting the RNA segment by encircling it around a protein disk is applicable to both transcription, when TRAP binds the nascent RNA, and to translation, when TRAP binds the same sequence within a non-coding leader region of the messenger RNA.

Structure of the trp RNA-binding attenuation protein, TRAP, bound to RNA.,Antson AA, Dodson EJ, Dodson G, Greaves RB, Chen X, Gollnick P Nature. 1999 Sep 16;401(6750):235-42. PMID:10499579<ref>PMID:10499579</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

</div>

<div class="pdbe-citations 1c9s" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Atcc 12980]]

[[Category: Antson, A A]]

[[Category: Chen, X P]]

[[Category: Dodson, E J]]

[[Category: Dodson, G G]]

[[Category: Gollnick, P]]

[[Category: Greaves, R B]]

[[Category: Trap]]