<table><tr><td colspan='2'>[[2vrh]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895] and [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VRH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2VRH FirstGlance]. <br>
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<table><tr><td colspan='2'>[[2vrh]] is a 4 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=2VRH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2VRH FirstGlance]. <br>
[[https://www.uniprot.org/uniprot/RL29_ECOLI RL29_ECOLI]] Binds 23S rRNA. It is not essential for growth.[HAMAP-Rule:MF_00374] One of the proteins that surrounds the polypeptide exit tunnel on the outside of the subunit. Contacts trigger factor (PubMed:12226666).[HAMAP-Rule:MF_00374] [[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> [[https://www.uniprot.org/uniprot/RL24_ECOLI RL24_ECOLI]] One of two assembly initiator proteins, it binds directly to the 5'-end of the 23S rRNA, where it nucleates assembly of the 50S subunit. It is not thought to be involved in the functions of the mature 50S subunit in vitro.<ref>PMID:357435</ref> One of the proteins that surrounds the polypeptide exit tunnel on the outside of the subunit.<ref>PMID:357435</ref> [[https://www.uniprot.org/uniprot/RL23_ECOL5 RL23_ECOL5]] One of the early assembly proteins it binds 23S rRNA. One of the proteins that surrounds the polypeptide exit tunnel on the outside of the ribosome. Forms the main docking site for trigger factor binding to the ribosome (By similarity).
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[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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[[Category: Bacillus coli migula 1895]]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Large Structures]]
[[Category: Large Structures]]
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[[Category: Ban, N]]
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[[Category: Ban N]]
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[[Category: Boehringer, D]]
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[[Category: Boehringer D]]
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[[Category: Bukau, B]]
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[[Category: Bukau B]]
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[[Category: Deuerling, E]]
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[[Category: Deuerling E]]
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[[Category: Hoffmann, A]]
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[[Category: Hoffmann A]]
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[[Category: Lozza, J]]
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[[Category: Lozza J]]
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[[Category: Maier, T]]
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[[Category: Maier T]]
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[[Category: Merz, F]]
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[[Category: Merz F]]
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[[Category: Preissler, S]]
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[[Category: Preissler S]]
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[[Category: Rutkowska, A]]
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[[Category: Rutkowska A]]
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[[Category: Schaffitzel, C]]
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[[Category: Schaffitzel C]]
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[[Category: Cell cycle]]
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[[Category: Cell division]]
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[[Category: Chaperone]]
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[[Category: Co-translational protein folding]]
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[[Category: Isomerase]]
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[[Category: Ribonucleoprotein]]
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[[Category: Ribosomal protein]]
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[[Category: Ribosome]]
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[[Category: Ribosome-nascent chain complex]]
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[[Category: Rna-binding]]
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[[Category: Rotamase]]
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[[Category: Rrna-binding]]
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[[Category: Trigger factor]]
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Revision as of 10:03, 9 May 2024
Structure of the E. coli trigger factor bound to a translating ribosome
2vrh is a 4 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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
Checkto colour the structure by Evolutionary Conservation, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
Ribosome-associated chaperone Trigger Factor (TF) initiates folding of newly synthesized proteins in bacteria. Here, we pinpoint by site-specific crosslinking the sequence of molecular interactions of Escherichia coli TF and nascent chains during translation. Furthermore, we provide the first full-length structure of TF associated with ribosome-nascent chain complexes by using cryo-electron microscopy. In its active state, TF arches over the ribosomal exit tunnel accepting nascent chains in a protective void. The growing nascent chain initially follows a predefined path through the entire interior of TF in an unfolded conformation, and even after folding into a domain it remains accommodated inside the protective cavity of ribosome-bound TF. The adaptability to accept nascent chains of different length and folding states may explain how TF is able to assist co-translational folding of all kinds of nascent polypeptides during ongoing synthesis. Moreover, we suggest a model of how TF's chaperoning function can be coordinated with the co-translational processing and membrane targeting of nascent polypeptides by other ribosome-associated factors.
Molecular mechanism and structure of Trigger Factor bound to the translating ribosome.,Merz F, Boehringer D, Schaffitzel C, Preissler S, Hoffmann A, Maier T, Rutkowska A, Lozza J, Ban N, Bukau B, Deuerling E EMBO J. 2008 Jun 4;27(11):1622-32. Epub 2008 May 22. PMID:18497744[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
↑ 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
↑ Merz F, Boehringer D, Schaffitzel C, Preissler S, Hoffmann A, Maier T, Rutkowska A, Lozza J, Ban N, Bukau B, Deuerling E. Molecular mechanism and structure of Trigger Factor bound to the translating ribosome. EMBO J. 2008 Jun 4;27(11):1622-32. Epub 2008 May 22. PMID:18497744 doi:http://dx.doi.org/10.1038/emboj.2008.89
