Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 68.14 kDa 
• Atom Count: 4845 
• Residue Count: 615 
• Unique protein chains: 1

1FMT

METHIONYL-TRNAFMET FORMYLTRANSFERASE FROM ESCHERICHIA COLI

• DOI: 10.2210/pdb1FMT/pdb

• Classification: FORMYLTRANSFERASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-10-13 Released: 1998-01-28 
• Deposition Author(s): Schmitt, E., Mechulam, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.256 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 

Literature

Structure of crystalline Escherichia coli methionyl-tRNA(f)Met formyltransferase: comparison with glycinamide ribonucleotide formyltransferase.

Schmitt, E., Blanquet, S., Mechulam, Y.

(1996) EMBO J 15: 4749-4758

• PubMed: 8887566 
• Primary Citation of Related Structures:  
  1FMT


• PubMed Abstract: 
  

Formylation of the methionyl moiety esterified to the 3' end of tRNA(f)Met is a key step in the targeting of initiator tRNA towards the translation start machinery in prokaryotes. Accordingly, the presence of methionyl-tRNA(f)Met formyltransferase (FMT), the enzyme responsible for this formylation, is necessary for the normal growth of Escherichia coli. The present work describes the structure of crystalline E.coli FMT at 2.0 A, resolution. The protein has an N-terminal domain containing a Rossmann fold. This domain closely resembles that of the glycinamide ribonucleotide formyltransferase (GARF), an enzyme which, like FMT, uses N-10 formyltetrahydrofolate as formyl donor. However, FMT can be distinguished from GARF by a flexible loop inserted within its Rossmann fold. In addition, FMT possesses a C-terminal domain with a beta-barrel reminiscent of an OB fold. This latter domain provides a positively charged side oriented towards the active site. Biochemical evidence is presented for the involvement of these two idiosyncratic regions (the flexible loop in the N-terminal domain, and the C-terminal domain) in the binding of the tRNA substrate.

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Organizational Affiliation: 

Laboratoire de Biochimie, Unité de Recherche Associëe no.1970 du Centre National de la Recherche Scientifique, Palaiseau, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
METHIONYL-TRNA FMET FORMYLTRANSFERASE	A, B	314	Escherichia coli	Mutation(s): 0  Gene Names: fmt EC: 2.1.2.9
Find proteins for P23882 (Escherichia coli (strain K12)) Explore P23882  Go to UniProtKB:  P23882

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.256 
• R-Value Work: 0.214 
• R-Value Observed: 0.214 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 151.04	α = 90
b = 151.04	β = 90
c = 81.8	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
MOSFLM	data reduction
CCP4	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-10-13 
• Released Date: 1998-01-28 
Deposition Author(s): Schmitt, E., Mechulam, Y.

Revision History 

• Version 1.0: 1998-01-28
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance