1MEP

Crystal Structure of Streptavidin Double Mutant S45A/D128A with Biotin: Cooperative Hydrogen-Bond Interactions in the Streptavidin-Biotin System.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.295
  • R-Value Work: 0.201

Literature

Macromolecules
Sequence Display for 1MEP

Classification: Biotin-binding protein

Total Structure Weight: 53862.55

Macromolecule Entities
Molecule Chains Length Organism Details
Streptavidin A, B, C, D 127 Streptomyces avidinii Fragment: Core streptavidin (residues 13-139)
Mutation: S45A, D128A
Gene Name(s):
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG

Small Molecules
Ligands 1 Unique
ID Chains Name / Formula / InChI Key 2D Diagram 3D Interactions
BTN
Query on BTN

A, B, C, D BIOTIN
C10 H16 N2 O3 S
YBJHBAHKTGYVGT-ZKWXMUAHSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
External Ligand Annotations
ID Binding Affinity (Sequence Identity %)
BTN Kd: 1 nM (98) BindingDB
ΔH: -123 - -66.9 kJ/mol (97 - 98) BindingDB

N/A in BindingMoad
N/A in PDBbind

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.295
  • R-Value Work: 0.201
  • Space Group: P 1 21 1

Unit Cell:

Length (Å) Angle (°)
a = 50.65 α = 90.00
b = 97.86 β = 112.28
c = 52.17 γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History

Deposition Data

  • Deposited Date: 2002-08-08
  • Released Date: 2003-09-02
  • Deposition author(s): Hyre, D.E., Le Trong, I., Merritt, E.A., Stenkamp, R.E., Green, N.M., Stayton, P.S.

Revision History

  • Version 1_0: 2003-09-02

    Type: Initial release

  • Version 1_1: 2008-04-28

    Type: Version format compliance

  • Version 1_2: 2011-07-13

    Type: Version format compliance