1APB

A PRO TO GLY MUTATION IN THE HINGE OF THE ARABINOSE-BINDING PROTEIN ENHANCES BINDING AND ALTERS SPECIFICITY: SUGAR-BINDING AND CRYSTALLOGRAPHIC STUDIES

• PDB DOI: https://doi.org/10.2210/pdb1APB/pdb

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


• Deposited: 1991-11-15 Released: 1992-01-15 
• Deposition Author(s): Vermersch, P.S., Tesmer, J.J.G., Quiocho, F.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Observed: 0.192 

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 33.54 kDa 
• Atom Count: 2,503 
• 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
FCB	C [auth A]	beta-D-fucopyranose C6 H12 O5 SHZGCJCMOBCMKK-FPRJBGLDSA-N
FCA	B [auth A]	alpha-D-fucopyranose C6 H12 O5 SHZGCJCMOBCMKK-PHYPRBDBSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
FCB	Binding MOAD:  1APB	Kd: 1510 (nM) from 1 assay(s)
FCA	Binding MOAD:  1APB	Kd: 1510 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.76 Å
• R-Value Observed: 0.192 
• 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: 1992-01-15 
Deposition Author(s): Vermersch, P.S., Tesmer, J.J.G., Quiocho, F.A.

Revision History  

• Version 1.0: 1992-01-15
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Database references, Derived calculations, Other, Structure summary
• Version 2.1: 2024-02-07
  Changes: Data collection, Database references, Structure summary