4LHL

Structure of the N-terminal domain of the Flo1 adhesin (N-Flo1p) from the yeast Saccharomyces cerevisiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.43 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.134 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Molecular mechanism of flocculation self-recognition in yeast and its role in mating and survival.

Goossens, K.V.Ielasi, F.S.Nookaew, I.Stals, I.Alonso-Sarduy, L.Daenen, L.Van Mulders, S.E.Stassen, C.van Eijsden, R.G.Siewers, V.Delvaux, F.R.Kasas, S.Nielsen, J.Devreese, B.Willaert, R.G.

(2015) mBio 6: e00427-15

  • DOI: https://doi.org/10.1128/mBio.00427-15
  • Primary Citation of Related Structures:  
    4LHK, 4LHL, 4LHN

  • PubMed Abstract: 

    We studied the flocculation mechanism at the molecular level by determining the atomic structures of N-Flo1p and N-Lg-Flo1p in complex with their ligands. We show that they have similar ligand binding mechanisms but distinct carbohydrate specificities and affinities, which are determined by the compactness of the binding site. We characterized the glycans of Flo1p and their role in this binding process and demonstrate that glycan-glycan interactions significantly contribute to the cell-cell adhesion mechanism. Therefore, the extended flocculation mechanism is based on the self-interaction of Flo proteins and this interaction is established in two stages, involving both glycan-glycan and protein-glycan interactions. The crucial role of calcium in both types of interaction was demonstrated: Ca(2+) takes part in the binding of the carbohydrate to the protein, and the glycans aggregate only in the presence of Ca(2+). These results unify the generally accepted lectin hypothesis with the historically first-proposed "Ca(2+)-bridge" hypothesis. Additionally, a new role of cell flocculation is demonstrated; i.e., flocculation is linked to cell conjugation and mating, and survival chances consequently increase significantly by spore formation and by introduction of genetic variability. The role of Flo1p in mating was demonstrated by showing that mating efficiency is increased when cells flocculate and by differential transcriptome analysis of flocculating versus nonflocculating cells in a low-shear environment (microgravity). The results show that a multicellular clump (floc) provides a uniquely organized multicellular ultrastructure that provides a suitable microenvironment to induce and perform cell conjugation and mating.


  • Organizational Affiliation

    Department of Bioengineering Sciences, Structural Biology Research Center, Vrije Universiteit Brussel, Brussels, Belgium.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Flocculation protein FLO1263Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: FLO1FLO2FLO4FLO8YAR050W
UniProt
Find proteins for P32768 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32768 
Go to UniProtKB:  P32768
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32768
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download Ideal Coordinates CCD File 
B [auth A]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.43 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.132 
  • R-Value Observed: 0.134 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.8α = 90
b = 61.77β = 90
c = 106.73γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
BALBESphasing
REFMACrefinement
xia2data reduction
xia2data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-09-24
    Type: Initial release
  • Version 1.1: 2015-05-06
    Changes: Database references
  • Version 1.2: 2015-06-03
    Changes: Database references
  • Version 1.3: 2015-12-02
    Changes: Database references
  • Version 1.4: 2016-06-08
    Changes: Database references
  • Version 1.5: 2023-09-20
    Changes: Data collection, Database references, Derived calculations, Refinement description