5MRA

human SCBD (sorcin calcium binding domain) in complex with doxorubicin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.74 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Binding of doxorubicin to Sorcin impairs cell death and increases drug resistance in cancer cells.

Genovese, I.Fiorillo, A.Ilari, A.Masciarelli, S.Fazi, F.Colotti, G.

(2017) Cell Death Dis 8: e2950-e2950

  • DOI: 10.1038/cddis.2017.342

  • PubMed Abstract: 
  • Sorcin is a calcium binding protein that plays an important role in multidrug resistance (MDR) in tumors, since its expression confers resistance to doxorubicin and to other chemotherapeutic drugs. In this study, we show that Sorcin is able to bind d ...

    Sorcin is a calcium binding protein that plays an important role in multidrug resistance (MDR) in tumors, since its expression confers resistance to doxorubicin and to other chemotherapeutic drugs. In this study, we show that Sorcin is able to bind doxorubicin, vincristine, paclitaxel and cisplatin directly and with high affinity. The high affinity binding of doxorubicin to sorcin has been demonstrated with different techniques, that is, surface plasmon resonance, fluorescence titration and X-ray diffraction. Although the X-ray structure of sorcin in complex with doxorubicin has been solved at low resolution, it allows the identification of one of the two doxorubicin binding sites, placed at the interface between the EF5 loop the G helix and the EF4 loop. We show that Sorcin cellular localization changes upon doxorubicin treatment, an indication that the protein responds to doxorubicin and it presumably binds the drug also inside the cell, soon after drug entrance. We also demonstrate that Sorcin is able to limit the toxic effects of the chemotherapeutic agent in the cell. In addition, Sorcin silencing increases cell death upon treatment with doxorubicin, increases the accumulation of doxorubicin in cell nucleus, decreases the expression of MDR1 and doxorubicin efflux via MDR1.


    Organizational Affiliation

    Department of Biochemical Sciences, Sapienza University, Rome, Italy.,Department of Anatomical, Histological, Forensic &Orthopaedic Sciences, Section of Histology &Medical Embryology, Sapienza University, Rome, Italy.,IBPM-CNR Institute of Molecular Biology and Pathology, Italian National Research Council, Rome, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sorcin
A, B, C, D
167Homo sapiensMutation(s): 0 
Gene Names: SRI
Find proteins for P30626 (Homo sapiens)
Go to Gene View: SRI
Go to UniProtKB:  P30626
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DM2
Query on DM2

Download SDF File 
Download CCD File 
B
DOXORUBICIN
ADRIAMYCIN
C27 H29 N O11
AOJJSUZBOXZQNB-TZSSRYMLSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A, B, C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
DMS
Query on DMS

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Download CCD File 
B
DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.74 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 92.229α = 90.00
b = 104.831β = 90.00
c = 113.273γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling
REFMACrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-11-29
    Type: Initial release