2N5R

NMR structure of cFLIP-derived calmodulin binding peptide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 97 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Identification and Characterization of the Interaction Site between cFLIPL and Calmodulin.

Gaidos, G.Panaitiu, A.E.Guo, B.Pellegrini, M.Mierke, D.F.

(2015) Plos One 10: e0141692-e0141692

  • DOI: 10.1371/journal.pone.0141692

  • PubMed Abstract: 
  • Overexpression of the cellular FLICE-like inhibitory protein (cFLIP) has been reported in a number of tumor types. As an inactive procaspase-8 homologue, cFLIP is recruited to the intracellular assembly known as the Death Inducing Signaling Complex ( ...

    Overexpression of the cellular FLICE-like inhibitory protein (cFLIP) has been reported in a number of tumor types. As an inactive procaspase-8 homologue, cFLIP is recruited to the intracellular assembly known as the Death Inducing Signaling Complex (DISC) where it inhibits apoptosis, leading to cancer cell proliferation. Here we characterize the molecular details of the interaction between cFLIPL and calmodulin, a ubiquitous calcium sensing protein. By expressing the individual domains of cFLIPL, we demonstrate that the interaction with calmodulin is mediated by the N-terminal death effector domain (DED1) of cFLIPL. Additionally, we mapped the interaction to a specific region of the C-terminus of DED1, referred to as DED1 R4. By designing DED1/DED2 chimeric constructs in which the homologous R4 regions of the two domains were swapped, calmodulin binding properties were transferred to DED2 and removed from DED1. Furthermore, we show that the isolated DED1 R4 peptide binds to calmodulin and solve the structure of the peptide-protein complex using NMR and computational refinement. Finally, we demonstrate an interaction between cFLIPL and calmodulin in cancer cell lysates. In summary, our data implicate calmodulin as a potential player in DISC-mediated apoptosis and provide evidence for a specific interaction with the DED1 of cFLIPL.


    Organizational Affiliation

    Chemistry Department, Dartmouth College, Hanover, NH, United States of America.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CASP8 and FADD-like apoptosis regulator
A
12Homo sapiensMutation(s): 0 
Gene Names: CFLAR (CASH, CASP8AP1, CLARP, MRIT)
Find proteins for O15519 (Homo sapiens)
Go to Gene View: CFLAR
Go to UniProtKB:  O15519
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 97 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2015-07-24 
  • Released Date: 2015-11-18 
  • Deposition Author(s): Panaitiu, A.E.

Revision History 

  • Version 1.0: 2015-11-18
    Type: Initial release