Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 55.71 kDa 
• Atom Count: 2656 
• Modelled Residue Count: 308 
• Deposited Residue Count: 503 
• Unique protein chains: 1

2YHS

Structure of the E. coli SRP receptor FtsY

• PDB DOI: 10.2210/pdb2YHS/pdb

• Classification: CELL CYCLE
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2011-05-05 Released: 2011-05-18 
• Deposition Author(s): Stjepanovic, G., Bange, G., Wild, K., Sinning, I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.220 
• R-Value Work: 0.178 
• R-Value Observed: 0.180 

Literature

Lipids Trigger a Conformational Switch that Regulates Signal Recognition Particle (Srp)-Mediated Protein Targeting.

Stjepanovic, G., Kapp, K., Bange, G., Graf, C., Parlitz, R., Wild, K., Mayer, M.P., Sinning, I.

(2011) J Biol Chem 286: 23489

• PubMed: 21543314 
• DOI: 10.1074/jbc.M110.212340
• Primary Citation of Related Structures:  
  2YHS


• PubMed Abstract: 
  

Co-translational protein targeting to the membrane is mediated by the signal recognition particle and its receptor (FtsY). Their homologous GTPase domains interact at the membrane and form a heterodimer in which both GTPases are activated. The prerequisite for protein targeting is the interaction of FtsY with phospholipids. However, the mechanism of FtsY regulation by phospholipids remained unclear. Here we show that the N terminus of FtsY (A domain) is natively unfolded in solution and define the complete membrane-targeting sequence. We show that the membrane-targeting sequence is highly dynamic in solution, independent of nucleotides and directly responds to the density of anionic phospholipids by a random coil-helix transition. This conformational switch is essential for tethering FtsY to membranes and activates the GTPase for its subsequent interaction with the signal recognition particle. Our results underline the dynamics of lipid-protein interactions and their importance in the regulation of protein targeting and translocation across biological membranes.

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Organizational Affiliation: 

Biochemie Zentrum (BZH), University of Heidelberg, INF 328, 69120 Heidelberg, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CELL DIVISION PROTEIN FTSY	A	503	Escherichia coli K-12	Mutation(s): 0  Gene Names: ftsY, b3464, JW3429
UniProt
Find proteins for P10121 (Escherichia coli (strain K12)) Explore P10121  Go to UniProtKB:  P10121

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.220 
• R-Value Work: 0.178 
• R-Value Observed: 0.180 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.358	α = 90
b = 108.412	β = 90
c = 31.902	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-05-05 
• Released Date: 2011-05-18 
Deposition Author(s): Stjepanovic, G., Bange, G., Wild, K., Sinning, I.

Revision History  

• Version 1.0: 2011-05-18
  Type: Initial release
  
• Version 1.1: 2011-06-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance