3HYD

LVEALYL peptide derived from human insulin chain B, residues 11-17


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.146 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Molecular basis for insulin fibril assembly.

Ivanova, M.I.Sievers, S.A.Sawaya, M.R.Wall, J.S.Eisenberg, D.

(2009) Proc.Natl.Acad.Sci.USA 106: 18990-18995

  • DOI: 10.1073/pnas.0910080106

  • PubMed Abstract: 
  • In the rare medical condition termed injection amyloidosis, extracellular fibrils of insulin are observed. We found that the segment of the insulin B-chain with sequence LVEALYL is the smallest segment that both nucleates and inhibits the fibrillatio ...

    In the rare medical condition termed injection amyloidosis, extracellular fibrils of insulin are observed. We found that the segment of the insulin B-chain with sequence LVEALYL is the smallest segment that both nucleates and inhibits the fibrillation of full-length insulin in a molar ratio-dependent manner, suggesting that this segment is central to the cross-beta spine of the insulin fibril. In isolation from the rest of the protein, LVEALYL forms microcrystalline aggregates with fibrillar morphology, the structure of which we determined to 1 A resolution. The LVEALYL segments are stacked into pairs of tightly interdigitated beta-sheets, each pair displaying the dry steric zipper interface typical of amyloid-like fibrils. This structure leads to a model for fibrils of human insulin consistent with electron microscopic, x-ray fiber diffraction, and biochemical studies.


    Organizational Affiliation

    Howard Hughes Medical Institute, UCLA-DOE Institute for Genomics and Proteomics, Los Angeles CA 90095-1570, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin
A
7Homo sapiensMutation(s): 0 
Gene Names: INS
Find proteins for P01308 (Homo sapiens)
Go to Gene View: INS
Go to UniProtKB:  P01308
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.146 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 49.478α = 90.00
b = 4.838β = 96.65
c = 19.442γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PHASERphasing
DENZOdata reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description