5JIM

Crystal Structure of Human Transthyretin in Complex with Perfluoroktansulfonsyra (PFOS)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.26 Å
  • R-Value Free: 0.158 
  • R-Value Work: 0.135 
  • R-Value Observed: 0.136 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Structure-Based Virtual Screening Protocol for in Silico Identification of Potential Thyroid Disrupting Chemicals Targeting Transthyretin.

Zhang, J.Begum, A.Brannstrom, K.Grundstrom, C.Iakovleva, I.Olofsson, A.Sauer-Eriksson, A.E.Andersson, P.L.

(2016) Environ Sci Technol 50: 11984-11993

  • DOI: 10.1021/acs.est.6b02771
  • Primary Citation of Related Structures:  
    5JID, 5JIM, 5JIQ, 5L4F, 5L4I, 5L4J, 5L4M

  • PubMed Abstract: 
  • Thyroid disruption by xenobiotics is associated with a broad spectrum of severe adverse outcomes. One possible molecular target of thyroid hormone disrupting chemicals (THDCs) is transthyretin (TTR), a thyroid hormone transporter in vertebrates. To better understand the interactions between TTR and THDCs, we determined the crystallographic structures of human TTR in complex with perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), and 2,2',4,4'-tetrahydroxybenzophenone (BP2) ...

    Thyroid disruption by xenobiotics is associated with a broad spectrum of severe adverse outcomes. One possible molecular target of thyroid hormone disrupting chemicals (THDCs) is transthyretin (TTR), a thyroid hormone transporter in vertebrates. To better understand the interactions between TTR and THDCs, we determined the crystallographic structures of human TTR in complex with perfluorooctanesulfonic acid (PFOS), perfluorooctanoic acid (PFOA), and 2,2',4,4'-tetrahydroxybenzophenone (BP2). The molecular interactions between the ligands and TTR were further characterized using molecular dynamics simulations. A structure-based virtual screening (VS) protocol was developed with the intention of providing an efficient tool for the discovery of novel TTR-binders from the Tox21 inventory. Among the 192 predicted binders, 12 representatives were selected, and their TTR binding affinities were studied with isothermal titration calorimetry, of which seven compounds had binding affinities between 0.26 and 100 μM. To elucidate structural details in their binding to TTR, crystal structures were determined of TTR in complex with four of the identified compounds including 2,6-dinitro-p-cresol, bisphenol S, clonixin, and triclopyr. The compounds were found to bind in the TTR hormone binding sites as predicted. Our results show that the developed VS protocol is able to successfully identify potential THDCs, and we suggest that it can be used to propose THDCs for future toxicological evaluations.


    Related Citations: 
    • Tetrabromobisphenol A Is an Efficient Stabilizer of the Transthyretin Tetramer.
      Iakovleva, I., Begum, A., Brannstrom, K., Wijsekera, A., Nilsson, L., Zhang, J., Andersson, P.L., Sauer-Eriksson, A.E., Olofsson, A.
      (2016) PLoS One 11: e0153529

    Organizational Affiliation

    Department of Chemistry and ‡Department of Medical Biochemistry and Biophysics, Umeå University , SE-901 87 Umeå, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TransthyretinA, B127Homo sapiensMutation(s): 0 
Gene Names: TTRPALB
UniProt & NIH Common Fund Data Resources
Find proteins for P02766 (Homo sapiens)
Explore P02766 
Go to UniProtKB:  P02766
PHAROS:  P02766
GTEx:  ENSG00000118271 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02766
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P8S
Query on P8S

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
heptadecafluoro-1-octanesulfonic acid
C8 H F17 O3 S
YFSUTJLHUFNCNZ-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

Download Ideal Coordinates CCD File 
E [auth B]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.26 Å
  • R-Value Free: 0.158 
  • R-Value Work: 0.135 
  • R-Value Observed: 0.136 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.146α = 90
b = 85.413β = 90
c = 64.121γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swedish Research CouncilSweden--

Revision History  (Full details and data files)

  • Version 1.0: 2016-10-05
    Type: Initial release
  • Version 1.1: 2016-11-09
    Changes: Database references