4F4J

Conversion of the enzyme guanylate kinase into a mitotic spindle orienting protein by a single mutation that inhibits gmp- induced closing


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


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Literature

Conversion of the enzyme guanylate kinase into a mitotic-spindle orienting protein by a single mutation that inhibits GMP-induced closing.

Johnston, C.A.Whitney, D.S.Volkman, B.F.Doe, C.Q.Prehoda, K.E.

(2011) Proc.Natl.Acad.Sci.USA 108: E973-E978

  • DOI: 10.1073/pnas.1104365108

  • PubMed Abstract: 
  • New protein functions can require complex sequence changes, but the minimal path is not well understood. The guanylate kinase enzyme (GK(enz)), which catalyzes phosphotransfer from ATP to GMP, evolved into the GK domain (GK(dom)), a protein-binding d ...

    New protein functions can require complex sequence changes, but the minimal path is not well understood. The guanylate kinase enzyme (GK(enz)), which catalyzes phosphotransfer from ATP to GMP, evolved into the GK domain (GK(dom)), a protein-binding domain found in membrane associate guanylate kinases that function in mitotic spindle orientation and cell adhesion. Using an induced polarity assay for GK(dom) function, we show that a single serine to proline mutation is sufficient to switch extant GK(enz) into a functional GK(dom). The mutation blocks catalysis (GK(enz) function) but allows protein binding and spindle orientation (GK(dom) function). Furthermore, whereas the GK(enz) undergoes a large closing motion upon GMP binding, fluorescence quenching and NMR demonstrate that the S → P mutation inhibits GMP-induced GK movements. Disrupting GK closing with a mutation at a different position also leads to GK(dom) function, suggesting that blocking the GK(enz) closing motion is sufficient for functional conversion of GK(enz) to GK(dom). Although subtle changes in protein function can require complex sequence paths, our work shows that entirely new functions can arise from single mutations that alter protein dynamics.


    Organizational Affiliation

    Institute of Molecular Biology, Department of Chemistry, University of Oregon, Eugene, OR 97403, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Guanylate kinase
A, B
202Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 1 
Gene Names: GUK1
EC: 2.7.4.8
Find proteins for P15454 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: GUK1
Go to UniProtKB:  P15454
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.216 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 103.682α = 90.00
b = 103.682β = 90.00
c = 130.881γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-13
    Type: Initial release