6QK8

Crystal structure of yeast 14-3-3 protein (Bmh1) from Saccharomyces cerevisiae with the Nha1p (yeast Na+/H+ antiporter) 14-3-3 binding motif Ser481


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.917 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


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Literature

The activity of Saccharomyces cerevisiae Na+, K+/H+antiporter Nha1 is negatively regulated by 14-3-3 protein binding at serine 481.

Smidova, A.Stankova, K.Petrvalska, O.Lazar, J.Sychrova, H.Obsil, T.Zimmermannova, O.Obsilova, V.

(2019) Biochim Biophys Acta Mol Cell Res 1866: 118534-118534

  • DOI: 10.1016/j.bbamcr.2019.118534

  • PubMed Abstract: 
  • Na <sup>+ </sup>/H <sup>+ </sup> antiporters are involved in ensuring optimal intracellular concentrations of alkali-metal cations and protons in most organisms. In Saccharomyces cerevisiae, the plasma-membrane Na <sup>+ </sup>, K <sup>+ </sup>/H <su ...

    Na + /H + antiporters are involved in ensuring optimal intracellular concentrations of alkali-metal cations and protons in most organisms. In Saccharomyces cerevisiae, the plasma-membrane Na + , K + /H + antiporter Nha1 mediates Na + and K + efflux, which is important for cell growth in the presence of salts. Nha1 belongs among housekeeping proteins and, due to its ability to export K + , it has many physiological functions. The Nha1 transport activity is regulated through its long, hydrophilic and unstructured C-terminus (554 of 985 aa). Although Nha1 has been previously shown to interact with the yeast 14-3-3 isoform (Bmh2), the binding site remains unknown. In this work, we identified the residues through which Nha1 interacts with the 14-3-3 protein. Biophysical characterization of the interaction between the C-terminal polypeptide of Nha1 and Bmh proteins in vitro revealed that the 14-3-3 protein binds to phosphorylated Ser481 of Nha1, and the crystal structure of the phosphopeptide containing Ser481 bound to Bmh1 provided the structural basis of this interaction. Our data indicate that 14-3-3 binding induces a disorder-to-order transition of the C-terminus of Nha1, and in vivo experiments showed that the mutation of Ser481 to Ala significantly increases cation efflux activity via Nha1, which renders cells sensitive to low K + concentrations. Hence, 14-3-3 binding is apparently essential for the negative regulation of Nha1 activity, which should be low under standard growth conditions, when low amounts of toxic salts are present and yeast cells need to accumulate high amounts of K + .


    Organizational Affiliation

    Department of Structural Biology of Signaling Proteins, Division BIOCEV, Institute of Physiology of the Czech Academy of Sciences, 252 50 Vestec, Czech Republic; Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University, 128 43 Prague, Czech Republic.,Department of Membrane Transport, Institute of Physiology of the Czech Academy of Sciences, 142 20 Prague 4 - Krč, Czech Republic. Electronic address: olga.zimmermannova@fgu.cas.cz.,Department of Structural Biology of Signaling Proteins, Division BIOCEV, Institute of Physiology of the Czech Academy of Sciences, 252 50 Vestec, Czech Republic.,Department of Membrane Transport, Institute of Physiology of the Czech Academy of Sciences, 142 20 Prague 4 - Krč, Czech Republic.,Laboratory of Advanced Optical Microscopy, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, 166 10 Prague, Czech Republic; Center for Nanobiology and Structural Biology, Institute of Microbiology of the Czech Academy of Sciences, 373 33 Nove Hrady, Czech Republic.,Department of Structural Biology of Signaling Proteins, Division BIOCEV, Institute of Physiology of the Czech Academy of Sciences, 252 50 Vestec, Czech Republic. Electronic address: veronika.obsilova@fgu.cas.cz.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein BMH1
A, B, C, D
236Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: BMH1
Find proteins for P29311 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P29311
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Na(+)/H(+) antiporter
E, F, G, H
8Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: NHA1
Find proteins for Q99271 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q99271
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
E, F, G, H
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.917 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.218 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 56.850α = 95.90
b = 59.112β = 104.14
c = 66.700γ = 91.19
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXrefinement
MOLREPphasing
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Grant Agency of the Czech RepublicCzech Republic17-01953S

Revision History 

  • Version 1.0: 2019-10-02
    Type: Initial release