1ABE

NOVEL STEREOSPECIFICITY OF THE L-ARABINOSE-BINDING PROTEIN

• PDB DOI: https://doi.org/10.2210/pdb1ABE/pdb
• Entry: 1ABE supersedes: 1ABP

• Classification: BINDING PROTEIN
• Organism(s): Escherichia coli
• Mutation(s): No 


• Deposited: 1992-04-23 Released: 1993-10-31 
• Deposition Author(s): Vyas, N.K., Quiocho, F.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Observed: 
  0.137 (Depositor) 

Literature

Novel stereospecificity of the L-arabinose-binding protein

Quiocho, F.A., Vyas, N.K.

(1984) Nature 310: 381-386

• PubMed: 6379466 
• DOI: https://doi.org/10.1038/310381a0
• Primary Citation of Related Structures:  
  1ABE


• PubMed Abstract: 
  

  Tertiary structure refinement at 1.7 A resolution of the liganded form of L-arabinose-binding protein from Escherichia coli has revealed a novel binding site geometry which accommodates both alpha- and beta-anomers of L-arabinose. This detailed structure analysis provides new understanding of protein-sugar interaction, the process by which the binding protein minimizes the difference in the stability of the two bound sugar anomers, and the roles of periplasmic binding proteins in active transport.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 33.55 kDa 
• Atom Count: 2,563 
• Modelled Residue Count: 305 
• Deposited Residue Count: 306 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
L-ARABINOSE-BINDING PROTEIN	A	306	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P02924 (Escherichia coli (strain K12)) Explore P02924  Go to UniProtKB:  P02924

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ARB	C [auth A]	beta-L-arabinopyranose C5 H10 O5 SRBFZHDQGSBBOR-KLVWXMOXSA-N
ARA	B [auth A]	alpha-L-arabinopyranose C5 H10 O5 SRBFZHDQGSBBOR-QMKXCQHVSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Observed: 0.137 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.46	α = 90
b = 71.82	β = 90
c = 77.84	γ = 90

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1993-10-31 
Deposition Author(s): Vyas, N.K., Quiocho, F.A.
• This entry supersedes: 1ABP

Revision History  

• Version 1.0: 1993-10-31
  Type: Initial release
  
• Version 1.1: 2008-03-10
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Other, Structure summary
• Version 1.4: 2024-02-07
  Changes: Data collection, Database references, Structure summary