2KJI

A divergent ins protein in c. elegans structurally resemble insulin and activates the human insulin receptor

• PDB DOI: https://doi.org/10.2210/pdb2KJI/pdb

• Classification: HORMONE
• Organism(s): Caenorhabditis elegans
• Mutation(s): No 


• Deposited: 2009-05-28 Released: 2009-06-16 
• Deposition Author(s): Hua, Q.X., Nakarawa, S.H., Wilken, R., Ramos, R.R., Jia, W.H., Bass, J., Weiss, M.A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

A divergent INS protein in Caenorhabditis elegans structurally resembles human insulin and activates the human insulin receptor.

Hua, Q.X., Nakagawa, S.H., Wilken, J., Ramos, R.R., Jia, W., Bass, J., Weiss, M.A.

(2003) Genes Dev 17: 826-831

• PubMed: 12654724 
• DOI: https://doi.org/10.1101/gad.1058003
• Primary Citation of Related Structures:  
  2KJI


• PubMed Abstract: 
  

  Caenorhabditis elegans contains a family of putative insulin-like genes proposed to regulate dauer arrest and senescence. These sequences often lack characteristic sequence features of human insulin essential for its folding, structure, and function. Here, we describe the structure and receptor-binding properties of INS-6, a single-chain polypeptide expressed in specific neurons. Despite multiple nonconservative changes in sequence, INS-6 recapitulates an insulin-like fold. Although lacking classical receptor-binding determinants, INS-6 binds to and activates the human insulin receptor. Its activity is greater than that of an analogous single-chain human insulin analog.

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Organizational Affiliation: 

Department of Biochemistry, Case Western Reserve School of Medicine, Cleveland, OH 44106, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 5.3 kDa 
• Atom Count: 361 
• Modelled Residue Count: 50 
• Deposited Residue Count: 50 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Probable insulin-like peptide beta-type 5	A	50	Caenorhabditis elegans	Mutation(s): 0  Gene Names: ins-6, ZK84.6
UniProt
Find proteins for P56174 (Caenorhabditis elegans) Explore P56174  Go to UniProtKB:  P56174

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-06-16 
Deposition Author(s): Hua, Q.X., Nakarawa, S.H., Wilken, R., Ramos, R.R., Jia, W.H., Bass, J., Weiss, M.A.

Revision History  

• Version 1.0: 2009-06-16
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2019-09-18
  Changes: Data collection, Database references, Derived calculations