4EQV

Structure of Saccharomyces cerevisiae invertase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.222 

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This is version 1.1 of the entry. See complete history


Literature

Three-dimensional Structure of Saccharomyces Invertase: ROLE OF A NON-CATALYTIC DOMAIN IN OLIGOMERIZATION AND SUBSTRATE SPECIFICITY.

Sainz-Polo, M.A.Ramirez-Escudero, M.Lafraya, A.Gonzalez, B.Marin-Navarro, J.Polaina, J.Sanz-Aparicio, J.

(2013) J Biol Chem 288: 9755-9766

  • DOI: 10.1074/jbc.M112.446435
  • Primary Citation of Related Structures:  
    4EQV

  • PubMed Abstract: 
  • Invertase is an enzyme that is widely distributed among plants and microorganisms and that catalyzes the hydrolysis of the disaccharide sucrose into glucose and fructose. Despite the important physiological role of Saccharomyces invertase (SInv) and the historical relevance of this enzyme as a model in early biochemical studies, its structure had not yet been solved ...

    Invertase is an enzyme that is widely distributed among plants and microorganisms and that catalyzes the hydrolysis of the disaccharide sucrose into glucose and fructose. Despite the important physiological role of Saccharomyces invertase (SInv) and the historical relevance of this enzyme as a model in early biochemical studies, its structure had not yet been solved. We report here the crystal structure of recombinant SInv at 3.3 Å resolution showing that the enzyme folds into the catalytic β-propeller and β-sandwich domains characteristic of GH32 enzymes. However, SInv displays an unusual quaternary structure. Monomers associate in two different kinds of dimers, which are in turn assembled into an octamer, best described as a tetramer of dimers. Dimerization plays a determinant role in substrate specificity because this assembly sets steric constraints that limit the access to the active site of oligosaccharides of more than four units. Comparative analysis of GH32 enzymes showed that formation of the SInv octamer occurs through a β-sheet extension that seems unique to this enzyme. Interaction between dimers is determined by a short amino acid sequence at the beginning of the β-sandwich domain. Our results highlight the role of the non-catalytic domain in fine-tuning substrate specificity and thus supplement our knowledge of the activity of this important family of enzymes. In turn, this gives a deeper insight into the structural features that rule modularity and protein-carbohydrate recognition.


    Organizational Affiliation

    Departamento de Cristalografía y Biología Estructural, Instituto de Química-Física Rocasolano, Consejo Superior de Investigaciones Científicas, Serrano 119, 28006 Madrid, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Invertase 2A, B, C, D, E, F, G, H512Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: SUC2YIL162W
EC: 3.2.1.26
Find proteins for P00724 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P00724 
Go to UniProtKB:  P00724
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.40 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.222 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 268.659α = 90
b = 268.659β = 90
c = 224.452γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-06
    Type: Initial release
  • Version 1.1: 2013-04-24
    Changes: Database references