3GBP

STRUCTURE OF THE PERIPLASMIC GLUCOSE/GALACTOSE RECEPTOR OF SALMONELLA TYPHIMURIUM

• PDB DOI: https://doi.org/10.2210/pdb3GBP/pdb
• Entry: 3GBP supersedes: 1GBP

• Classification: PERIPLASMIC BINDING PROTEIN
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Mutation(s): No 


• Deposited: 1990-01-25 Released: 1991-07-15 
• Deposition Author(s): Mowbray, S.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Work: 0.158 

Literature

Structure of the periplasmic glucose/galactose receptor of Salmonella typhimurium.

Mowbray, S.L., Smith, R.D., Cole, L.B.

(1990) Receptor 1: 41-53

• PubMed: 1967096 
• Primary Citation of Related Structures:  
  3GBP


• PubMed Abstract: 
  

  The X-ray structure of the periplasmic glucose/galactose receptor (binding protein) of Salmonella typhimurium has been solved by the method of multiple isomorphous replacement and refined to a resolution of 2.4 A with an R-factor of 15.8%. The protein consists of two highly-similar structural domains with a bound sugar molecule trapped between. A combined sequence/structural approach is used to compare the structure of this protein to a similar arabinose receptor. The new sequence alignment obtained is used to analyze a number of features conserved for structural and functional reasons. This information allowed the prediction of similar features within the sequence of the analogous ribose receptor. Some of the consequences of the structures for chemotaxis and transport are discussed.

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Organizational Affiliation: 

Howard Hughes Medical Institute, Southwestern Medical Center, Dallas, TX 75235.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 33.42 kDa 
• Atom Count: 2,439 
• Modelled Residue Count: 305 
• Deposited Residue Count: 307 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GALACTOSE-BINDING PROTEIN	A	307	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0
UniProt
Find proteins for P23905 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P23905  Go to UniProtKB:  P23905

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BGC	B [auth A]	beta-D-glucopyranose C6 H12 O6 WQZGKKKJIJFFOK-VFUOTHLCSA-N
CA	C [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Work: 0.158 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 119.59	α = 90
b = 37.28	β = 123.37
c = 80.23	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1991-07-15 
Deposition Author(s): Mowbray, S.L.
• This entry supersedes: 1GBP

Revision History  

• Version 1.0: 1991-07-15
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary
• Version 2.1: 2024-02-21
  Changes: Data collection, Database references, Structure summary