Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 13.73 kDa 
• Atom Count: 1330 
• Residue Count: 126 
• Unique protein chains: 1

2NT4

Receiver domain from Myxococcus xanthus social motility protein FrzS (H92F mutant)

• DOI: 10.2210/pdb2NT4/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Myxococcus xanthus
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2006-11-06 Released: 2007-03-13 
• Deposition Author(s): Echols, N., Fraser, J., Weisfield, S., Merlie, J., Zusman, D., Alber, T.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.02 Å
• R-Value Free: 0.154 
• R-Value Work: 0.123 
• R-Value Observed: 0.124 

Literature

An atypical receiver domain controls the dynamic polar localization of the Myxococcus xanthus social motility protein FrzS.

Fraser, J.S., Merlie, J.P., Echols, N., Weisfield, S.R., Mignot, T., Wemmer, D.E., Zusman, D.R., Alber, T.

(2007) Mol Microbiol 65: 319-332

• PubMed: 17573816 
• DOI: 10.1111/j.1365-2958.2007.05785.x
• Structures With Same Primary Citation


• PubMed Abstract: 
  

The Myxococcus xanthus FrzS protein transits from pole-to-pole within the cell, accumulating at the pole that defines the direction of movement in social (S) motility. Here we show using atomic-resolution crystallography and NMR that the FrzS receiver domain (RD) displays the conserved switch Tyr102 in an unusual conformation, lacks the conserved Asp phosphorylation site, and fails to bind Mg(2+) or the phosphoryl analogue, Mg(2+) x BeF(3). Mutation of Asp55, closest to the canonical site of RD phosphorylation, showed no motility phenotype in vivo, demonstrating that phosphorylation at this site is not necessary for domain function. In contrast, the Tyr102Ala and His92Phe substitutions on the canonical output face of the FrzS RD abolished S-motility in vivo. Single-cell fluorescence microscopy measurements revealed a striking mislocalization of these mutant FrzS proteins to the trailing cell pole in vivo. The crystal structures of the mutants suggested that the observed conformation of Tyr102 in the wild-type FrzS RD is not sufficient for function. These results support the model that FrzS contains a novel 'pseudo-receiver domain' whose function requires recognition of the RD output face but not Asp phosphorylation.

---

Organizational Affiliation: 

Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720-3320, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Response regulator homolog	A	127	Myxococcus xanthus	Mutation(s): 1  Gene Names: frzS
Find proteins for O68522 (Myxococcus xanthus) Go to UniProtKB:  O68522

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.02 Å
• R-Value Free: 0.154 
• R-Value Work: 0.123 
• R-Value Observed: 0.124 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 34.883	α = 90
b = 37.119	β = 102.49
c = 42.104	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-11-06 
• Released Date: 2007-03-13 
Deposition Author(s): Echols, N., Fraser, J., Weisfield, S., Merlie, J., Zusman, D., Alber, T.

Revision History 

• Version 1.0: 2007-03-13
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance