6DR9

Crystal Structure of the YopH PTP1B Chimera 3 PTPase apo form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 

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This is version 1.3 of the entry. See complete history


Literature

A YopH PTP1B Chimera Shows the Importance of the WPD-Loop Sequence to the Activity, Structure, and Dynamics of Protein Tyrosine Phosphatases.

Moise, G.Morales, Y.Beaumont, V.Caradonna, T.Loria, J.P.Johnson, S.J.Hengge, A.C.

(2018) Biochemistry 57: 5315-5326

  • DOI: 10.1021/acs.biochem.8b00663
  • Primary Citation of Related Structures:  
    6DR1, 6DR7, 6DR9, 6DRB, 6DT6

  • PubMed Abstract: 
  • To study factors that affect WPD-loop motion in protein tyrosine phosphatases (PTPs), a chimera of PTP1B and YopH was created by transposing the WPD loop from PTP1B to YopH. Several subsequent mutations proved to be necessary to obtain a soluble, active enzyme ...

    To study factors that affect WPD-loop motion in protein tyrosine phosphatases (PTPs), a chimera of PTP1B and YopH was created by transposing the WPD loop from PTP1B to YopH. Several subsequent mutations proved to be necessary to obtain a soluble, active enzyme. That chimera, termed chimera 3, retains productive WPD-loop motions and general acid catalysis with a pH dependency similar to that of the native enzymes. Kinetic isotope effects show the mechanism and transition state for phosphoryl transfer are unaltered. Catalysis of the chimera is slower than that of either of its parent enzymes, although its rate is comparable to those of most native PTPs. X-ray crystallography and nuclear magnetic resonance were used to probe the structure and dynamics of chimera 3. The chimera's structure was found to sample an unproductive hyper-open conformation of its WPD loop, a geometry that has not been observed in either of the parents or in other native PTPs. The reduced catalytic rate is attributed to the protein's sampling of this conformation in solution, reducing the fraction in the catalytically productive loop-closed conformation.


    Organizational Affiliation

    Department of Chemistry and Biochemistry , Utah State University , Logan , Utah 84322-0300 , United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Targeted effector proteinA306Yersinia pestisMutation(s): 6 
Gene Names: yopHYPCD1.67cY0013G4D65_20050G4D67_19670GD372_22270
EC: 3.1.3.48
UniProt
Find proteins for O68720 (Yersinia pestis)
Explore O68720 
Go to UniProtKB:  O68720
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO68720
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.178 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.808α = 90
b = 53.772β = 90
c = 103.196γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM112781
National Science Foundation (NSF, United States)United StatesDBI1228874

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-29
    Type: Initial release
  • Version 1.1: 2018-09-05
    Changes: Data collection, Database references
  • Version 1.2: 2018-09-19
    Changes: Data collection, Database references
  • Version 1.3: 2019-11-27
    Changes: Author supporting evidence