3T2W

Crystal structure of shwanavidin (F43A) - biotin complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Adaptation of a Thermostable Biotin-binding Protein in a Psychrophilic Environment.

Meir, A.Bayer, E.A.Livnah, O.

(2012) J Biol Chem 287: 17951-17962

  • DOI: 10.1074/jbc.M112.357186
  • Primary Citation of Related Structures:  
    3T2W, 3T2X, 3SZJ, 3SZH, 3SZI

  • PubMed Abstract: 
  • Shwanavidin is an avidin-like protein from the marine proteobactrium Shewanella denitrificans, which exhibits an innate dimeric structure while maintaining high affinity toward biotin. A unique residue (Phe-43) from the L3,4 loop and a distinctive disulfide bridge were shown to account for the high affinity toward biotin ...

    Shwanavidin is an avidin-like protein from the marine proteobactrium Shewanella denitrificans, which exhibits an innate dimeric structure while maintaining high affinity toward biotin. A unique residue (Phe-43) from the L3,4 loop and a distinctive disulfide bridge were shown to account for the high affinity toward biotin. Phe-43 emulates the function and position of the critical intermonomeric Trp that characterizes the tetrameric avidins but is lacking in shwanavidin. The 18 copies of the apo-monomer revealed distinctive snapshots of L3,4 and Phe-43, providing rare insight into loop flexibility, binding site accessibility, and psychrophilic adaptation. Nevertheless, as in all avidins, shwanavidin also displays high thermostability properties. The unique features of shwanavidin may provide a platform for the design of a long sought after monovalent form of avidin, which would be ideal for novel types of biotechnological application.


    Organizational Affiliation

    Department of Biological Chemistry, the Hebrew University of Jerusalem, Givat Ram, Jerusalem, Israel.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Avidin/streptavidinA122Shewanella denitrificans OS217Mutation(s): 1 
Gene Names: Sden_0912
Find proteins for Q12QS6 (Shewanella denitrificans (strain OS217 / ATCC BAA-1090 / DSM 15013))
Explore Q12QS6 
Go to UniProtKB:  Q12QS6
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BTN
Query on BTN

Download CCD File 
A
BIOTIN
C10 H16 N2 O3 S
YBJHBAHKTGYVGT-ZKWXMUAHSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
BTNKd :  35   nM  PDBBind
BTNKd:  1450   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.178 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.212α = 90
b = 63.212β = 90
c = 65.83γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2011-07-23 
  • Released Date: 2012-04-11 
  • Deposition Author(s): Livnah, O., Meir, A.

Revision History 

  • Version 1.0: 2012-04-11
    Type: Initial release
  • Version 1.1: 2012-04-25
    Changes: Database references
  • Version 1.2: 2012-06-13
    Changes: Database references
  • Version 1.3: 2016-10-12
    Changes: Advisory