3I4O

Crystal Structure of Translation Initiation Factor 1 from Mycobacterium tuberculosis

• PDB DOI: https://doi.org/10.2210/pdb3I4O/pdb

• Classification: TRANSLATION
• Organism(s): Mycobacterium tuberculosis H37Rv
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2009-07-02 Released: 2010-02-23 
• Deposition Author(s): Hatzopoulos, G.N., Mueller-Dieckmann, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.47 Å
• R-Value Free: 0.182 
• R-Value Work: 0.159 
• R-Value Observed: 0.160 

Literature

Structure of translation initiation factor 1 from Mycobacterium tuberculosis and inferred binding to the 30S ribosomal subunit.

Hatzopoulos, G.N., Mueller-Dieckmann, J.

(2010) FEBS Lett 584: 1011-1015

• PubMed: 20132820 
• DOI: https://doi.org/10.1016/j.febslet.2010.01.051
• Primary Citation of Related Structures:  
  3I4O


• PubMed Abstract: 
  

  The crystal structure of the free form of IF1 from Mycobacterium tuberculosis has been determined at 1.47 A resolution. The structure adopts the expected OB fold and matches the high structural conservation among IF1 orthologues. In order to further explore the function of Mtb-IF1, we built a model of its interaction with the 30S ribosomal subunit based on the crystal structure of the complex from Thermus thermophilus. The model suggests that several functionally important side chain residues undergo large movements while the rest of the protein in complex shows only very limited conformational change as compared to its form in solution.

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Organizational Affiliation: 

EMBL Hamburg Outstation, c/o DESY, Notkestr. 85, D-22603 Hamburg, Germany.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 18.27 kDa 
• Atom Count: 1,418 
• Modelled Residue Count: 135 
• Deposited Residue Count: 158 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Translation initiation factor IF-1	A, B	79	Mycobacterium tuberculosis H37Rv	Mutation(s): 0  Gene Names: infA, MCB1222.32c, MT3568, MTCY13E12.15c, Rv3462c, Rv3462c (infA)
UniProt
Find proteins for P9WKK3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore P9WKK3  Go to UniProtKB:  P9WKK3

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.47 Å
• R-Value Free: 0.182 
• R-Value Work: 0.159 
• R-Value Observed: 0.160 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.95	α = 90
b = 76.54	β = 90
c = 28.03	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHELX	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
BEST	data collection
SHELXD	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-02-23 
Deposition Author(s): Hatzopoulos, G.N., Mueller-Dieckmann, J.

Revision History  

• Version 1.0: 2010-02-23
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2013-11-13
  Changes: Database references
• Version 1.3: 2017-11-01
  Changes: Refinement description
• Version 1.4: 2024-03-20
  Changes: Data collection, Database references