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| | <StructureSection load='1w26' size='340' side='right'caption='[[1w26]], [[Resolution|resolution]] 2.70Å' scene=''> | | <StructureSection load='1w26' size='340' side='right'caption='[[1w26]], [[Resolution|resolution]] 2.70Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1w26]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1W26 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1W26 FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1w26]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1W26 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1W26 FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7Å</td></tr> |
| - | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1l1p|1l1p]], [[1oms|1oms]], [[1p9y|1p9y]]</td></tr> | + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</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=1w26 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1w26 OCA], [http://pdbe.org/1w26 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1w26 RCSB], [http://www.ebi.ac.uk/pdbsum/1w26 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1w26 ProSAT]</span></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=1w26 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1w26 OCA], [https://pdbe.org/1w26 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1w26 RCSB], [https://www.ebi.ac.uk/pdbsum/1w26 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1w26 ProSAT]</span></td></tr> |
| | </table> | | </table> |
| | == Function == | | == Function == |
| - | [[http://www.uniprot.org/uniprot/TIG_ECOLI TIG_ECOLI]] Involved in protein export. Acts as a chaperone by maintaining the newly synthesized secretory and non-secretory proteins in an open conformation. Binds to nascent polypeptide chains via ribosomal protein L23 (PubMed:12226666). Functions as a peptidyl-prolyl cis-trans isomerase in vitro, this activity is dispensible in vivo for chaperone activity.<ref>PMID:8633085</ref> <ref>PMID:8521806</ref> <ref>PMID:14726952</ref> | + | [https://www.uniprot.org/uniprot/TIG_ECOLI TIG_ECOLI] Involved in protein export. Acts as a chaperone by maintaining the newly synthesized secretory and non-secretory proteins in an open conformation. Binds to nascent polypeptide chains via ribosomal protein L23 (PubMed:12226666). Functions as a peptidyl-prolyl cis-trans isomerase in vitro, this activity is dispensible in vivo for chaperone activity.<ref>PMID:8633085</ref> <ref>PMID:8521806</ref> <ref>PMID:14726952</ref> |
| | == Evolutionary Conservation == | | == Evolutionary Conservation == |
| | [[Image:Consurf_key_small.gif|200px|right]] | | [[Image:Consurf_key_small.gif|200px|right]] |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bacillus coli migula 1895]] | + | [[Category: Escherichia coli]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Ban, N]] | + | [[Category: Ban N]] |
| - | [[Category: Bukau, B]] | + | [[Category: Bukau B]] |
| - | [[Category: Deuerling, E]] | + | [[Category: Deuerling E]] |
| - | [[Category: Ferbitz, L]] | + | [[Category: Ferbitz L]] |
| - | [[Category: Maier, T]] | + | [[Category: Maier T]] |
| - | [[Category: Patzelt, H]] | + | [[Category: Patzelt H]] |
| - | [[Category: Cell division]]
| + | |
| - | [[Category: Chaperone]]
| + | |
| - | [[Category: Isomerase]]
| + | |
| - | [[Category: Nascent chain]]
| + | |
| - | [[Category: Protein folding]]
| + | |
| - | [[Category: Ribosome associated protein]]
| + | |
| Structural highlights
Function
TIG_ECOLI Involved in protein export. Acts as a chaperone by maintaining the newly synthesized secretory and non-secretory proteins in an open conformation. Binds to nascent polypeptide chains via ribosomal protein L23 (PubMed:12226666). Functions as a peptidyl-prolyl cis-trans isomerase in vitro, this activity is dispensible in vivo for chaperone activity.[1] [2] [3]
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
During protein biosynthesis, nascent polypeptide chains that emerge from the ribosomal exit tunnel encounter ribosome-associated chaperones, which assist their folding to the native state. Here we present a 2.7 A crystal structure of Escherichia coli trigger factor, the best-characterized chaperone of this type, together with the structure of its ribosome-binding domain in complex with the Haloarcula marismortui large ribosomal subunit. Trigger factor adopts a unique conformation resembling a crouching dragon with separated domains forming the amino-terminal ribosome-binding 'tail', the peptidyl-prolyl isomerase 'head', the carboxy-terminal 'arms' and connecting regions building up the 'back'. From its attachment point on the ribosome, trigger factor projects the extended domains over the exit of the ribosomal tunnel, creating a protected folding space where nascent polypeptides may be shielded from proteases and aggregation. This study sheds new light on our understanding of co-translational protein folding, and suggests an unexpected mechanism of action for ribosome-associated chaperones.
Trigger factor in complex with the ribosome forms a molecular cradle for nascent proteins.,Ferbitz L, Maier T, Patzelt H, Bukau B, Deuerling E, Ban N Nature. 2004 Sep 30;431(7008):590-6. Epub 2004 Aug 29. PMID:15334087[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Hesterkamp T, Hauser S, Lutcke H, Bukau B. Escherichia coli trigger factor is a prolyl isomerase that associates with nascent polypeptide chains. Proc Natl Acad Sci U S A. 1996 Apr 30;93(9):4437-41. PMID:8633085
- ↑ Valent QA, Kendall DA, High S, Kusters R, Oudega B, Luirink J. Early events in preprotein recognition in E. coli: interaction of SRP and trigger factor with nascent polypeptides. EMBO J. 1995 Nov 15;14(22):5494-505. PMID:8521806
- ↑ Genevaux P, Keppel F, Schwager F, Langendijk-Genevaux PS, Hartl FU, Georgopoulos C. In vivo analysis of the overlapping functions of DnaK and trigger factor. EMBO Rep. 2004 Feb;5(2):195-200. Epub 2004 Jan 9. PMID:14726952 doi:10.1038/sj.embor.7400067
- ↑ Ferbitz L, Maier T, Patzelt H, Bukau B, Deuerling E, Ban N. Trigger factor in complex with the ribosome forms a molecular cradle for nascent proteins. Nature. 2004 Sep 30;431(7008):590-6. Epub 2004 Aug 29. PMID:15334087 doi:http://dx.doi.org/10.1038/nature02899
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