4FEB

Crystal Structure of Htt36Q3H-EX1-X1-C2(Beta)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.231 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Beta conformation of polyglutamine track revealed by a crystal structure of Huntingtin N-terminal region with insertion of three histidine residues.

Kim, M.

(2013) Prion 7: 221-228

  • DOI: 10.4161/pri.23807
  • Primary Citation of Related Structures:  
    4FEC, 4FED, 4FEB, 4FE8

  • PubMed Abstract: 
  • Huntington disease is an autosomal-dominant neurodegenerative disorder caused by a polyglutamine (polyQ) expansion (> 35Q) in the first exon (EX1) of huntingtin protein (Htt). mHtt protein is thought to adopt one or more toxic conformation(s) that are involved in pathogenic interactions in cells ...

    Huntington disease is an autosomal-dominant neurodegenerative disorder caused by a polyglutamine (polyQ) expansion (> 35Q) in the first exon (EX1) of huntingtin protein (Htt). mHtt protein is thought to adopt one or more toxic conformation(s) that are involved in pathogenic interactions in cells . However, the structure of mHtt is not known. Here, we present a near atomic resolution structure of mHtt36Q-EX1. To facilitate crystallization, three histidine residues (3H) were introduced within the Htt36Q stretch resulting in the sequence of Q 7HQHQHQ 27. The Htt36Q3H region adopts α-helix, loop, β-hairpin conformations. Furthermore, we observed interactions between the backbone of the Htt36Q3H β-strand with the aromatic residues mimicking putative-toxic interactions with other proteins. Our findings support previous predictions that the expanded mHtt-polyQ region adopts a β-sheet structure. Detailed structural information about mHtt improves our understanding of the pathogenic mechanisms in HD and other polyQ expansion disorders and may form the basis for rational design of small molecules that target toxic conformations of disease-causing proteins.


    Organizational Affiliation

    Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, USA. mwkim@chop.swmed.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Maltose-binding periplasmic protein,HuntingtinA, B, C452Escherichia coli O157:H7Homo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: malEZ5632ECs5017HTTHDIT15
Find proteins for P42858 (Homo sapiens)
Explore P42858 
Go to UniProtKB:  P42858
NIH Common Fund Data Resources
PHAROS:  P42858
Find proteins for P0AEY0 (Escherichia coli O157:H7)
Explore P0AEY0 
Go to UniProtKB:  P0AEY0
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
AA [auth B] , BA [auth B] , CA [auth B] , D [auth A] , DA [auth B] , E [auth A] , EA [auth B] , F [auth A] , 
AA [auth B],  BA [auth B],  CA [auth B],  D [auth A],  DA [auth B],  E [auth A],  EA [auth B],  F [auth A],  FA [auth B],  G [auth A],  GA [auth B],  H [auth A],  HA [auth B],  I [auth A],  IA [auth B],  J [auth A],  JA [auth C],  K [auth A],  KA [auth C],  LA [auth C],  MA [auth C],  NA [auth C],  OA [auth C],  PA [auth C],  Q [auth B],  QA [auth C],  R [auth B],  RA [auth C],  S [auth B],  SA [auth C],  T [auth B],  TA [auth C],  U [auth B],  V [auth B],  W [auth B],  X [auth B],  Y [auth B],  Z [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download Ideal Coordinates CCD File 
L [auth A], M [auth A], N [auth A], O [auth A], P [auth A], UA [auth C]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.231 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 155.052α = 90
b = 177.278β = 109.03
c = 78.868γ = 90
Software Package:
Software NamePurpose
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
PHASESphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2012-05-29 
  • Released Date: 2013-03-13 
  • Deposition Author(s): Kim, M.

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-13
    Type: Initial release
  • Version 1.1: 2013-07-03
    Changes: Database references
  • Version 1.2: 2017-06-07
    Changes: Database references