3JA1

Activation of GTP Hydrolysis in mRNA-tRNA Translocation by Elongation Factor G


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Activation of GTP hydrolysis in mRNA-tRNA translocation by elongation factor G.

Li, W.Liu, Z.Koripella, R.K.Langlois, R.Sanyal, S.Frank, J.

(2015) Sci Adv 1: e1500169-e1500169

  • DOI: 10.1126/sciadv.1500169
  • Primary Citation of Related Structures:  
    3J9Z, 3JA1

  • PubMed Abstract: 
  • During protein synthesis, elongation of the polypeptide chain by each amino acid is followed by a translocation step in which mRNA and transfer RNA (tRNA) are advanced by one codon. This crucial step is catalyzed by elongation factor G (EF-G), a guanosine triphosphatase (GTPase), and accompanied by a rotation between the two ribosomal subunits ...

    During protein synthesis, elongation of the polypeptide chain by each amino acid is followed by a translocation step in which mRNA and transfer RNA (tRNA) are advanced by one codon. This crucial step is catalyzed by elongation factor G (EF-G), a guanosine triphosphatase (GTPase), and accompanied by a rotation between the two ribosomal subunits. A mutant of EF-G, H91A, renders the factor impaired in guanosine triphosphate (GTP) hydrolysis and thereby stabilizes it on the ribosome. We use cryogenic electron microscopy (cryo-EM) at near-atomic resolution to investigate two complexes formed by EF-G H91A in its GTP state with the ribosome, distinguished by the presence or absence of the intersubunit rotation. Comparison of these two structures argues in favor of a direct role of the conserved histidine in the switch II loop of EF-G in GTPase activation, and explains why GTP hydrolysis cannot proceed with EF-G bound to the unrotated form of the ribosome.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Columbia University, 2-221 Blackwell, 165 West 168th Street, New York, NY 10032, USA ; Howard Hughes Medical Institute, Columbia University, New York, NY 10032, USA ; Department of Biological Sciences, Columbia University, New York, NY 10027, USA.



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Elongation factor GX [auth S3]702Escherichia coliMutation(s): 1 
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50S ribosomal protein L2AA [auth LD]272Escherichia coliMutation(s): 0 
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50S ribosomal protein L28GA [auth LZ]77Escherichia coliMutation(s): 0 
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50S ribosomal protein L34OA [auth L5]46Escherichia coliMutation(s): 0 
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50S ribosomal protein L35PA [auth L6]64Escherichia coliMutation(s): 0 
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50S ribosomal protein L36QA [auth L7]38Escherichia coliMutation(s): 0 
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50S ribosomal protein L6TA [auth LH]176Escherichia coliMutation(s): 0 
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50S ribosomal protein L10UA [auth LJ]164Escherichia coliMutation(s): 0 
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50S ribosomal protein L15VA [auth LN]144Escherichia coliMutation(s): 0 
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50S ribosomal protein L11WA [auth LK]141Escherichia coliMutation(s): 0 
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50S ribosomal protein L9YA [auth LI]149Escherichia coliMutation(s): 0 
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50S ribosomal protein L18CB [auth LQ]117Escherichia coliMutation(s): 0 
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50S ribosomal protein L19DB [auth LR]114Escherichia coliMutation(s): 0 
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50S ribosomal protein L20EB [auth LS]117Escherichia coliMutation(s): 0 
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50S ribosomal protein L21FB [auth LT]103Escherichia coliMutation(s): 0 
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16S ribosomal RNAB [auth SA]1542Escherichia coli
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mRNAC [auth S1]47Escherichia coli
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P/E-tRNAD [auth S2]77Thermus thermophilus
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5S ribosomal RNAY [auth LB]120Escherichia coli
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23S ribosomal RNAZ [auth LA]2904Escherichia coli
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Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP (Subject of Investigation/LOI)
Query on GTP

Download Ideal Coordinates CCD File 
GB [auth S3]GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-01
    Type: Initial release
  • Version 1.1: 2015-08-12
    Changes: Database references
  • Version 1.2: 2018-07-18
    Changes: Data collection