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2aar

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Revision as of 22:24, 11 September 2015

Structure of trigger factor binding domain in biologically homologous complex with eubacterial ribosome.

Structural highlights

2aar is a 3 chain structure with sequence from Deinococcus radiodurans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1nkw
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[TIG_DEIRA] Involved in protein export. Acts as a chaperone by maintaining the newly synthesized protein in an open conformation. Functions as a peptidyl-prolyl cis-trans isomerase (By similarity). Probably changes conformation upon binding to the ribosome (maybe in particular due to interaction with L24, PubMed:16271892), exposing a hydrophobic crevice that is probably important for its chaperone activity (PubMed:16091460 and PubMed:16271892).[HAMAP-Rule:MF_00303] [RL29_DEIRA] Binds the 23S rRNA. One of the proteins that surrounds the polypeptide exit tunnel on the outside of the subunit.[HAMAP-Rule:MF_00374] [RL23_DEIRA] One of the early assembly protein (By similarity) it binds 23S rRNA. One of the proteins that surrounds the polypeptide exit tunnel on the outside of the subunit. Forms the main docking site for trigger factor binding to the ribosome (PubMed:16091460 and PubMed:16271892).[HAMAP-Rule:MF_01369]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Trigger factor (TF), the first chaperone in eubacteria to encounter the emerging nascent chain, binds to the large ribosomal subunit in the vicinity of the protein exit tunnel opening and forms a sheltered folding space. Here, we present the 3.5-A crystal structure of the physiological complex of the large ribosomal subunit from the eubacterium Deinococcus radiodurans with the N-terminal domain of TF (TFa) from the same organism. For anchoring, TFa exploits a small ribosomal surface area in the vicinity of proteins L23 and L29, by using its "signature motif" as well as additional structural elements. The molecular details of TFa interactions reveal that L23 is essential for the association of TF with the ribosome and may serve as a channel of communication with the nascent chain progressing in the tunnel. L29 appears to induce a conformational change in TFa, which results in the exposure of TFa hydrophobic patches to the opening of the ribosomal exit tunnel, thus increasing its affinity for hydrophobic segments of the emerging nascent polypeptide. This observation implies that, in addition to creating a protected folding space for the emerging nascent chain, TF association with the ribosome prevents aggregation by providing a competing hydrophobic environment and may be critical for attaining the functional conformation necessary for chaperone activity.

Structure of trigger factor binding domain in biologically homologous complex with eubacterial ribosome reveals its chaperone action.,Baram D, Pyetan E, Sittner A, Auerbach-Nevo T, Bashan A, Yonath A Proc Natl Acad Sci U S A. 2005 Aug 23;102(34):12017-22. Epub 2005 Aug 9. PMID:16091460^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Baram D, Pyetan E, Sittner A, Auerbach-Nevo T, Bashan A, Yonath A. Structure of trigger factor binding domain in biologically homologous complex with eubacterial ribosome reveals its chaperone action. Proc Natl Acad Sci U S A. 2005 Aug 23;102(34):12017-22. Epub 2005 Aug 9. PMID:16091460

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2aar"

@@ Line 4: / Line 4: @@
 <table><tr><td colspan='2'>[[2aar]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Deinococcus_radiodurans Deinococcus radiodurans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AAR OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2AAR FirstGlance]. <br>
 </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1nkw|1nkw]]</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=2aar FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2aar OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2aar RCSB], [http://www.ebi.ac.uk/pdbsum/2aar PDBsum]</span></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=2aar FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2aar OCA], [http://pdbe.org/2aar PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2aar RCSB], [http://www.ebi.ac.uk/pdbsum/2aar PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 26: / Line 26: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 2aar" style="background-color:#fffaf0;"></div>
 ==See Also==
+*[[Ribosomal protein L23|Ribosomal protein L23]]
 *[[Ribosomal protein L29|Ribosomal protein L29]]
 == References ==

2aar

From Proteopedia

Revision as of 22:24, 11 September 2015

Structure of trigger factor binding domain in biologically homologous complex with eubacterial ribosome.

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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