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  Cryo-EM reveals an active role for aminoacyl-tRNA in the accommodation process

Valle, M., Sengupta, J., Swami, N. K., Grassucci, R. A., Burkhardt, N., Nierhaus, K. H., et al. (2002). Cryo-EM reveals an active role for aminoacyl-tRNA in the accommodation process. EMBO Journal, 21(13), 3557-3567.

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Valle, Mikel, Autor
Sengupta, Jayati, Autor
Swami, Neil K., Autor
Grassucci, Robert A., Autor
Burkhardt, Nils1, Autor
Nierhaus, Knud H.2, Autor           
Agrawal, Rajendra K., Autor
Frank, Joachim, Autor
Affiliations:
1Max Planck Society, ou_persistent13              
2Ribosomes, Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1433558              

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Schlagwörter: decoding/electron microscopy/elongation factor Tu/ribosome/tRNA
 Zusammenfassung: During the elongation cycle of protein biosynthesis, the specific amino acid coded for by the mRNA is delivered by a complex that is comprised of the cognate aminoacyl-tRNA, elongation factor Tu and GTP. As this ternary complex binds to the ribosome, the anticodon end of the tRNA reaches the decoding center in the 30S subunit. Here we present the cryo- electron microscopy (EM) study of an Escherichia coli 70S ribosome-bound ternary complex stalled with an antibiotic, kirromycin. In the cryo-EM map the anticodon arm of the tRNA presents a new conformation that appears to facilitate the initial codon–anticodon interaction. Furthermore, the elbow region of the tRNA is seen to contact the GTPase-associated center on the 50S subunit of the ribosome, suggesting an active role of the tRNA in the transmission of the signal prompting the GTP hydrolysis upon codon recognition.

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Sprache(n): eng - English
 Datum: 2002-07
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Identifikatoren: eDoc: 24722
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Titel: EMBO Journal
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 21 (13) Artikelnummer: - Start- / Endseite: 3557 - 3567 Identifikator: -