Miraculin-like protein from Vitis vinifera

Experimental Data Snapshot

  • Resolution: 1.30 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.175 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Structural and functional analysis of miraculin-like protein from Vitis vinifera.

Ohkura, S.I.Hori, M.Saitoh, K.Okuzawa, T.Okamoto, I.Furukawa, N.Shimizu-Ibuka, A.

(2018) Biochim Biophys Acta Proteins Proteom 1866: 1125-1130

  • DOI: https://doi.org/10.1016/j.bbapap.2018.08.009
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The so-called miraculin-like proteins (MLPs) are homologous to miraculin, a homodimeric protein with taste-modifying activity that converts sourness into sweetness. The identity between MLPs and miraculin generally ranges from 30% to 55%, and both MLPs and miraculin are categorized into the Kunitz-type soybean trypsin inhibitor (STI) family. MLP from grape (Vitis vinifera; vvMLP) exhibits significant homology to miraculin (61% identity), suggesting that vvMLP possesses miraculin-like properties. The results of size-exclusion chromatography and sensory analysis illustrated that vvMLP exists as a monomer in solution with no detectable taste-modifying activity. Crystal structure determination revealed that vvMLP exists as a β-trefoil fold, similarly as other MLPs and Kunitz-type protein inhibitors. The conformation of the loops, including the so-called reactive loop in the STI family, was substantially different between vvMLP and STI. Recombinant vvMLP had inhibitory activity against trypsin (K i  = 13.7 μM), indicating that the protein can act as a moderate trypsin inhibitor.

  • Organizational Affiliation

    Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, 265-1 Higashijima, Akiha-ku, Niigata 956-8603, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
mirauclin-like protein179Vitis viniferaMutation(s): 1 
Gene Names: VITISV_025776
Find proteins for D7TY99 (Vitis vinifera)
Explore D7TY99 
Go to UniProtKB:  D7TY99
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD7TY99
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.30 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.04α = 90
b = 59.6β = 90
c = 74.78γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number

Revision History  (Full details and data files)

  • Version 1.0: 2018-10-03
    Type: Initial release
  • Version 1.1: 2018-10-17
    Changes: Data collection, Database references
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description