6TYH

Four-Disulfide Insulin Analog A22/B22

  • Classification: HORMONE
  • Organism(s): Homo sapiens
  • Mutation(s): Yes 

  • Deposited: 2019-08-08 Released: 2019-11-13 
  • Deposition Author(s): Blakely, A.D., Xiong, X.
  • Funding Organization(s): National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.166 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Novel four-disulfide insulin analog with high aggregation stability and potency.

Xiong, X.Blakely, A.Karra, P.VandenBerg, M.A.Ghabash, G.Whitby, F.Zhang, Y.W.Webber, M.J.Holland, W.L.Hill, C.P.Chou, D.H.

(2020) Chem Sci 11: 195-200

  • DOI: 10.1039/c9sc04555d
  • Primary Citation of Related Structures:  
    6TYH

  • PubMed Abstract: 
  • Although insulin was first purified and used therapeutically almost a century ago, there is still a need to improve therapeutic efficacy and patient convenience. A key challenge is the requirement for refrigeration to avoid inactivation of insulin by agg ...

    Although insulin was first purified and used therapeutically almost a century ago, there is still a need to improve therapeutic efficacy and patient convenience. A key challenge is the requirement for refrigeration to avoid inactivation of insulin by aggregation/fibrillation. Here, in an effort to mitigate this problem, we introduced a 4 th disulfide bond between a C-terminal extended insulin A chain and residues near the C-terminus of the B chain. Insulin activity was retained by an analog with an additional disulfide bond between residues A22 and B22, while other linkages tested resulted in much reduced potency. Furthermore, the A22-B22 analog maintains the native insulin tertiary structure as demonstrated by X-ray crystal structure determination. We further demonstrate that this four-disulfide analog has similar in vivo potency in mice compared to native insulin and demonstrates higher aggregation stability. In conclusion, we have discovered a novel four-disulfide insulin analog with high aggregation stability and potency.


    Organizational Affiliation

    Department of Biochemistry , University of Utah , Salt Lake City UT 84112 , USA . Email: chris@biochem.utah.edu ; Email: dchou@biochem.utah.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Insulin A chain ACEGIK22Homo sapiensMutation(s): 1 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Explore P01308 
Go to UniProtKB:  P01308
NIH Common Fund Data Resources
PHAROS:  P01308
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Insulin B chain BDFHJL30Homo sapiensMutation(s): 1 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Explore P01308 
Go to UniProtKB:  P01308
NIH Common Fund Data Resources
PHAROS:  P01308
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IPH
Query on IPH

Download Ideal Coordinates CCD File 
A, C, D, E, G, I, K
PHENOL
C6 H6 O
ISWSIDIOOBJBQZ-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
J, L
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
ACN
Query on ACN

Download Ideal Coordinates CCD File 
A, B
ACETONE
C3 H6 O
CSCPPACGZOOCGX-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
B, H
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.166 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.231α = 90
b = 61.821β = 112.814
c = 60.468γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Cootmodel building
XDSdata reduction
XDSdata scaling
AutoSolphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesR01DK120430

Revision History 

  • Version 1.0: 2019-11-13
    Type: Initial release
  • Version 1.1: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.2: 2020-03-11
    Changes: Database references