Huf protein - paralogue of the tau55 histidine phosphatase domain

Experimental Data Snapshot

  • Resolution: 2.05 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 

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This is version 2.0 of the entry. See complete history


Structural and Functional Characterization of a Phosphatase Domain within Yeast General Transcription Factor Tfiiic.

Taylor, N.M.I.Glatt, S.Hennrich, M.L.Von Scheven, G.Grotsch, H.Fernandez-Tornero, C.Rybin, V.Gavin, A.Kolb, P.Muller, C.W.

(2013) J Biol Chem 288: 15110

  • DOI: https://doi.org/10.1074/jbc.M112.427856
  • Primary Citation of Related Structures:  
    2YN0, 2YN2

  • PubMed Abstract: 

    Saccharomyces cerevisiae τ55, a subunit of the RNA polymerase III-specific general transcription factor TFIIIC, comprises an N-terminal histidine phosphatase domain (τ55-HPD) whose catalytic activity and cellular function is poorly understood. We solved the crystal structures of τ55-HPD and its closely related paralogue Huf and used in silico docking methods to identify phosphoserine- and phosphotyrosine-containing peptides as possible substrates that were subsequently validated using in vitro phosphatase assays. A comparative phosphoproteomic study identified additional phosphopeptides as possible targets that show the involvement of these two phosphatases in the regulation of a variety of cellular functions. Our results identify τ55-HPD and Huf as bona fide protein phosphatases, characterize their substrate specificities, and provide a small set of regulated phosphosite targets in vivo.

  • Organizational Affiliation

    Structural and Computational Biology Unit, European Molecular Biology Laboratory, 69117 Heidelberg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
UNCHARACTERIZED PROTEIN YNL108C279Saccharomyces cerevisiae S288CMutation(s): 0 
Find proteins for P53929 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P53929 
Go to UniProtKB:  P53929
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP53929
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on FMT

Download Ideal Coordinates CCD File 
C H2 O2
Experimental Data & Validation

Experimental Data

  • Resolution: 2.05 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.72α = 90
b = 86.72β = 90
c = 98.96γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-04-03
    Type: Initial release
  • Version 1.1: 2013-04-17
    Changes: Database references
  • Version 1.2: 2013-04-24
    Changes: Structure summary
  • Version 1.3: 2013-06-12
    Changes: Database references
  • Version 2.0: 2023-12-20
    Changes: Atomic model, Data collection, Database references, Derived calculations, Other, Refinement description