3WUT

Structure basis of inactivating cell abscission


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.301 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and biochemical insights into the role of testis-expressed gene 14 (TEX14) in forming the stable intercellular bridges of germ cells

Kim, H.J.Yoon, J.Matsuura, A.Na, J.H.Lee, W.K.Kim, H.Choi, J.W.Park, J.E.Park, S.J.Kim, K.T.Chang, R.Lee, B.I.Yu, Y.G.Shin, Y.K.Jeong, C.Rhee, K.Lee, H.H.

(2015) Proc.Natl.Acad.Sci.USA --: --

  • DOI: 10.1073/pnas.1418606112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Intercellular bridges are a conserved feature of spermatogenesis in mammalian germ cells and derive from arresting cell abscission at the final stage of cytokinesis. However, it remains to be fully understood how germ cell abscission is arrested in t ...

    Intercellular bridges are a conserved feature of spermatogenesis in mammalian germ cells and derive from arresting cell abscission at the final stage of cytokinesis. However, it remains to be fully understood how germ cell abscission is arrested in the presence of general cytokinesis components. The TEX14 (testis-expressed gene 14) protein is recruited to the midbody and plays a key role in the inactivation of germ cell abscission. To gain insights into the structural organization of TEX14 at the midbody, we have determined the crystal structures of the EABR [endosomal sorting complex required for transport (ESCRT) and ALIX-binding region] of CEP55 bound to the TEX14 peptide (or its chimeric peptides) and performed functional characterization of the CEP55-TEX14 interaction by multiexperiment analyses. We show that TEX14 interacts with CEP55-EABR via its AxGPPx3Y (Ala793, Gly795, Pro796, Pro797, and Tyr801) and PP (Pro803 and Pro804) sequences, which together form the AxGPPx3YxPP motif. TEX14 competitively binds to CEP55-EABR to prevent the recruitment of ALIX, which is a component of the ESCRT machinery with the AxGPPx3Y motif. We also demonstrate that a high affinity and a low dissociation rate of TEX14 to CEP55, and an increase in the local concentration of TEX14, cooperatively prevent ALIX from recruiting ESCRT complexes to the midbody. The action mechanism of TEX14 suggests a scheme of how to inactivate the abscission of abnormal cells, including cancer cells.


    Organizational Affiliation

    Department of Bio & Nano Chemistry, Kookmin University, Seoul 136-702, Korea;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Centrosomal protein of 55 kDa
A, B, D, E, G, H, J, K
63Homo sapiensMutation(s): 0 
Gene Names: CEP55 (C10orf3, URCC6)
Find proteins for Q53EZ4 (Homo sapiens)
Go to Gene View: CEP55
Go to UniProtKB:  Q53EZ4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Inactive serine/threonine-protein kinase TEX14
C, F, I, L
14Homo sapiensMutation(s): 0 
Gene Names: TEX14 (SGK307)
Find proteins for Q8IWB6 (Homo sapiens)
Go to Gene View: TEX14
Go to UniProtKB:  Q8IWB6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
B, F
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.301 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.220 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 53.913α = 90.00
b = 102.622β = 90.00
c = 132.535γ = 90.00
Software Package:
Software NamePurpose
PHENIXmodel building
PHENIXrefinement
PHENIXphasing
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-15
    Type: Initial release
  • Version 1.1: 2015-10-07
    Type: Database references