Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 11.96 kDa 
• Atom Count: 845 
• Modelled Residue Count: 105 
• Deposited Residue Count: 105 
• Unique protein chains: 1

2NLW

Solution structure of the RRM domain of human eukaryotic initiation factor 3b

• PDB DOI: 10.2210/pdb2NLW/pdb

• Classification: TRANSLATION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-10-20 Released: 2007-02-06 
• Deposition Author(s): ElAntak, L., Tzakos, A.G., Locker, N., Lukavsky, P.J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 16 
• Selection Criteria: structures with the lowest energy 

Literature

Structure of eIF3b RNA recognition motif and its interaction with eIF3j: structural insights into the recruitment of eIF3b to the 40 S ribosomal subunit.

ElAntak, L., Tzakos, A.G., Locker, N., Lukavsky, P.J.

(2007) J Biol Chem 282: 8165-8174

• PubMed: 17190833 
• DOI: 10.1074/jbc.M610860200
• Primary Citation of Related Structures:  
  2NLW


• PubMed Abstract: 
  

Mammalian eIF3 is a 700-kDa multiprotein complex essential for initiation of protein synthesis in eukaryotic cells. It consists of 13 subunits (eIF3a to -m), among which eIF3b serves as a major scaffolding protein. Here we report the solution structure of the N-terminal RNA recognition motif of human eIF3b (eIF3b-RRM) determined by NMR spectroscopy. The structure reveals a noncanonical RRM with a negatively charged surface in the beta-sheet area contradictory with potential RNA binding activity. Instead, eIF3j, which is required for stable 40 S ribosome binding of the eIF3 complex, specifically binds to the rear alpha-helices of the eIF3b-RRM, opposite to its beta-sheet surface. Moreover, we identify that an N-terminal 69-amino acid peptide of eIF3j is sufficient for binding to eIF3b-RRM and that this interaction is essential for eIF3b-RRM recruitment to the 40 S ribosomal subunit. Our results provide the first structure of an important subdomain of a core eIF3 subunit and detailed insights into protein-protein interactions between two eIF3 subunits required for stable eIF3 recruitment to the 40 S subunit.

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Organizational Affiliation: 

Laboratory of Molecular Biology, Medical Research Council, Hills Road, Cambridge CB2 2QH, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Eukaryotic translation initiation factor 3 subunit 9	A	105	Homo sapiens	Mutation(s): 0  Gene Names: EIF3S9, EIF3B
UniProt & NIH Common Fund Data Resources
Find proteins for P55884 (Homo sapiens) Explore P55884  Go to UniProtKB:  P55884
PHAROS:  P55884

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 16 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2NLW Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-10-20 
• Released Date: 2007-02-06 
Deposition Author(s): ElAntak, L., Tzakos, A.G., Locker, N., Lukavsky, P.J.

Revision History  

• Version 1.0: 2007-02-06
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-16
  Changes: Data collection, Database references, Derived calculations