4WNI

Crystal structure of the T229K mutant of human GAPDH at 2.3 angstroems resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.169 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

A Dimer Interface Mutation in Glyceraldehyde-3-Phosphate Dehydrogenase Regulates Its Binding to AU-rich RNA.

White, M.R.Khan, M.M.Deredge, D.Ross, C.R.Quintyn, R.Zucconi, B.E.Wysocki, V.H.Wintrode, P.L.Wilson, G.M.Garcin, E.D.

(2015) J Biol Chem 290: 1770-1785

  • DOI: 10.1074/jbc.M114.618165
  • Primary Citation of Related Structures:  
    4WNC, 4WNI

  • PubMed Abstract: 
  • Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is an enzyme best known for its role in glycolysis. However, extra-glycolytic functions of GAPDH have been described, including regulation of protein expression via RNA binding. GAPDH binds to numerous adenine-uridine rich elements (AREs) from various mRNA 3'-untranslated regions in vitro and in vivo despite its lack of a canonical RNA binding motif ...

    Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is an enzyme best known for its role in glycolysis. However, extra-glycolytic functions of GAPDH have been described, including regulation of protein expression via RNA binding. GAPDH binds to numerous adenine-uridine rich elements (AREs) from various mRNA 3'-untranslated regions in vitro and in vivo despite its lack of a canonical RNA binding motif. How GAPDH binds to these AREs is still unknown. Here we discovered that GAPDH binds with high affinity to the core ARE from tumor necrosis factor-α mRNA via a two-step binding mechanism. We demonstrate that a mutation at the GAPDH dimer interface impairs formation of the second RNA-GAPDH complex and leads to changes in the RNA structure. We investigated the effect of this interfacial mutation on GAPDH oligomerization by crystallography, small-angle x-ray scattering, nano-electrospray ionization native mass spectrometry, and hydrogen-deuterium exchange mass spectrometry. We show that the mutation does not significantly affect GAPDH tetramerization as previously proposed. Instead, the mutation promotes short-range and long-range dynamic changes in regions located at the dimer and tetramer interface and in the NAD(+) binding site. These dynamic changes are localized along the P axis of the GAPDH tetramer, suggesting that this region is important for RNA binding. Based on our results, we propose a model for sequential GAPDH binding to RNA via residues located at the dimer and tetramer interfaces.


    Organizational Affiliation

    From the Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, Maryland 21250, egarcin@umbc.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glyceraldehyde-3-phosphate dehydrogenaseB [auth A],
C [auth B],
D [auth C],
A [auth O]
335Homo sapiensMutation(s): 1 
Gene Names: GAPDHGAPDCDABP0047OK/SW-cl.12
EC: 1.2.1.12 (PDB Primary Data), 2.6.99 (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P04406 (Homo sapiens)
Explore P04406 
Go to UniProtKB:  P04406
PHAROS:  P04406
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04406
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.363α = 90
b = 133.095β = 90
c = 147.768γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
HKL-2000data scaling
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-12-03
    Type: Initial release
  • Version 1.1: 2014-12-17
    Changes: Database references
  • Version 1.2: 2015-02-11
    Changes: Database references
  • Version 1.3: 2017-11-22
    Changes: Database references, Derived calculations, Other, Refinement description, Source and taxonomy