6Z7O

Crystal structure of Thioredoxin T from Drosophila melanogaster


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.33 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of the germline-specific Deadhead and thioredoxin T proteins from Drosophila melanogaster reveal unique features among thioredoxins.

Freier, R.Aragon, E.Baginski, B.Pluta, R.Martin-Malpartida, P.Ruiz, L.Condeminas, M.Gonzalez, C.Macias, M.J.

(2021) IUCrJ 8: 281-294

  • DOI: 10.1107/S2052252521000221
  • Primary Citation of Related Structures:  
    6Z7O, 6ZMU

  • PubMed Abstract: 
  • Thioredoxins (Trxs) are ubiquitous enzymes that regulate the redox state in cells. In Drosophila , there are two germline-specific Trxs, Deadhead (Dhd) and thioredoxin T (TrxT), that belong to the lethal(3)malignant brain tumor signature genes and to the 'survival network' of genes that mediate the cellular response to DNA damage ...

    Thioredoxins (Trxs) are ubiquitous enzymes that regulate the redox state in cells. In Drosophila , there are two germline-specific Trxs, Deadhead (Dhd) and thioredoxin T (TrxT), that belong to the lethal(3)malignant brain tumor signature genes and to the 'survival network' of genes that mediate the cellular response to DNA damage. Dhd is a maternal protein required for early embryogenesis that promotes protamine-histone exchange in fertilized eggs and midblastula transition. TrxT is testis-specific and associates with the lampbrush loops of the Y chromosome. Here, the first structures of Dhd and TrxT are presented, unveiling new features of these two thioredoxins. Dhd has positively charged patches on its surface, in contrast to the negatively charged surfaces commonly found in most Trxs. This distinctive charge distribution helps to define initial encounter complexes with DNA/RNA that will lead to final specific interactions with cofactors to promote chromatin remodeling. TrxT contains a C-terminal extension, which is mostly unstructured and highly flexible, that wraps the conserved core through a closed conformation. It is believed that these new structures can guide future work aimed at understanding embryo development and redox homeostasis in Drosophila . Moreover, due to their restricted presence in Schizophora (a section of the true flies), these structures can help in the design of small-molecular binders to modulate native redox homeostasis, thereby providing new applications for the control of plagues that cause human diseases and/or bring about economic losses by damaging crop production.


    Related Citations: 
    • Structures of the germline-specific Deadhead and Thioredoxin T proteins from Drosophila melanogaster reveal unique features among Thioredoxins
      Freier, R., Aragon, E., Baginski, B., Pluta, R., Martin-Malpartida, P., Ruiz, L., Condeminas, M., Gonzaez, C., Macias, M.
      (2020) Biorxiv --: --

    Organizational Affiliation

    ICREA, Passeig Lluís Companys 23, 08010 Barcelona, Spain.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thioredoxin-TA157Drosophila melanogasterMutation(s): 0 
Gene Names: TrxTCG3315
UniProt
Find proteins for Q8IFW4 (Drosophila melanogaster)
Explore Q8IFW4 
Go to UniProtKB:  Q8IFW4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8IFW4
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.33 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.09α = 90
b = 49.312β = 90
c = 54.283γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Union (EU)SpainIRBPostPro2.0_600404

Revision History  (Full details and data files)

  • Version 1.0: 2020-10-21
    Type: Initial release
  • Version 1.1: 2021-03-24
    Changes: Database references