1JU8

Solution structure of Leginsulin, a plant hormon


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: The submitted conformer models are the 15 structures with the lowest energy. 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A possible physiological function and the tertiary structure of a 4-kDa peptide in legumes

Yamazaki, T.Takaoka, M.Katoh, E.Hanada, K.Sakita, M.Sakata, K.Nishiuchi, Y.Hirano, H.

(2003) Eur J Biochem 270: 1269-1276

  • DOI: 10.1046/j.1432-1033.2003.03489.x
  • Primary Citation of Related Structures:  
    1JU8

  • PubMed Abstract: 
  • Previously, we isolated a 4-kDa peptide capable of binding to a 43-kDa receptor-like protein and stimulating protein kinase activity of the 43-kDa protein in soybean. Both of them were found to localize in the plasma membranes and cell walls. Here, w ...

    Previously, we isolated a 4-kDa peptide capable of binding to a 43-kDa receptor-like protein and stimulating protein kinase activity of the 43-kDa protein in soybean. Both of them were found to localize in the plasma membranes and cell walls. Here, we report the physiological effects of 4-kDa peptide expressed transiently in the cultured carrot and bird's-foot trefoil cells transfected with pBI 121 plasmid containing the 4-kDa peptide gene. At early developmental stage, the transgenic callus grew rapidly compared to the wild callus in both species. Cell proliferation of in vitro cultured nonembryogenic carrot callus was apparently affected with the 4-kDa peptide in the medium. Complementary DNAs encoding the 4-kDa peptide from mung bean and azuki bean were cloned by PCR and sequenced. The amino-acid sequences deduced from the nucleotide sequences are homologous among legume species, particularly, the sites of cysteine residues are highly conserved. This conserved sequence reflects the importance of intradisulfide bonds required for the 4-kDa peptide to perform its function. Three dimensional structure of the 4-kDa peptide determined by NMR spectroscopy suggests that this peptide is a T-knot scaffold containing three beta-strands, and the specific binding activity to the 43-kDa protein and stimulatory effect on the protein phosphorylation could be attributed to the spatial arrangements of hydrophobic residues at the solvent-exposed surface of two-stranded beta-sheet of 4-kDa peptide. The importance of these residues for the 4-kDa peptide to bind to the 43-kDa protein was indicated by site-directed mutagenesis. These results suggest that the 4-kDa peptide is a hormone-like peptide and the 43-kDa protein is involved in cellular signal transduction of the peptide.


    Organizational Affiliation

    National Institute of Agrobiological Sciences, Tsukuba, Ibaraki, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
LeginsulinA37N/AMutation(s): 0 
Find proteins for Q39837 (Glycine max)
Explore Q39837 
Go to UniProtKB:  Q39837
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: The submitted conformer models are the 15 structures with the lowest energy. 
  • OLDERADO: 1JU8 Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-06-17
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance