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.

Macromolecule Content

• Total Structure Weight: 31.92 kDa 
• Atom Count: 2361 
• Modelled Residue Count: 274 
• Deposited Residue Count: 274 
• Unique protein chains: 1

1AF7

CHER FROM SALMONELLA TYPHIMURIUM

• PDB DOI: 10.2210/pdb1AF7/pdb

• Classification: METHYLTRANSFERASE
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-03-22 Released: 1998-01-28 
• Deposition Author(s): Djordjevic, S., Stock, A.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.280 
• R-Value Work: 0.200 

Literature

Crystal structure of the chemotaxis receptor methyltransferase CheR suggests a conserved structural motif for binding S-adenosylmethionine.

Djordjevic, S., Stock, A.M.

(1997) Structure 5: 545-558

• PubMed: 9115443 
• DOI: 10.1016/s0969-2126(97)00210-4
• Primary Citation of Related Structures:  
  1AF7


• PubMed Abstract: 
  

Flagellated bacteria swim towards favorable chemicals and away from deleterious ones. The sensing of chemoeffector gradients involves chemotaxis receptors, transmembrane proteins that detect stimuli through their periplasmic domains and transduce signals via their cytoplasmic domains to the downstream signaling components. Signaling outputs from chemotaxis receptors are influenced both by the binding of the chemoeffector ligand to the periplasmic domain and by methylation of specific glutamate residues on the cytoplasmic domain of the receptor. Methylation is catalyzed by CheR, an S-adenosylmethionine-dependent methyltransferase. CheR forms a tight complex with the receptor by binding a region of the receptors that is distinct from the methylation site. CheR belongs to a broad class of enzymes involved in the methylation of a variety of substrates. Until now, no structure from the class of protein methyltransferases has been characterized.

---

Organizational Affiliation: 

Howard Hughes Medical, Institute Center for Advanced Biotechnology and Medicine, Department of Biochemistry, University of Medicine and Dentistry of New Jersey, Piscataway, New Jersey, 08854, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CHEMOTAXIS RECEPTOR METHYLTRANSFERASE CHER	A	274	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  EC: 2.1.1.80
UniProt
Find proteins for P07801 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P07801  Go to UniProtKB:  P07801

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SAH	B [auth A]	S-ADENOSYL-L-HOMOCYSTEINE C14 H20 N6 O5 S ZJUKTBDSGOFHSH-WFMPWKQPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.280 
• R-Value Work: 0.200 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.45	α = 90
b = 47.96	β = 112.64
c = 63.06	γ = 90

Software Package:

Software Name	Purpose
ARP/wARP	model building
PHASES	phasing
DENZO	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-03-22 
• Released Date: 1998-01-28 
Deposition Author(s): Djordjevic, S., Stock, A.M.

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