3WUT

Structure basis of inactivating cell abscission


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.222 

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 U S A 

  • DOI: 10.1073/pnas.1418606112
  • Primary Citation of Related Structures:  
    3WUT, 3WUU, 3WUV

  • 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 the presence of general cytokinesis components ...

    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 Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, Korea hyungholee@snu.ac.kr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Centrosomal protein of 55 kDaA, B, D, E, G, H, J, K63Homo sapiensMutation(s): 0 
Gene Names: CEP55C10orf3URCC6
UniProt & NIH Common Fund Data Resources
Find proteins for Q53EZ4 (Homo sapiens)
Explore Q53EZ4 
Go to UniProtKB:  Q53EZ4
PHAROS:  Q53EZ4
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Inactive serine/threonine-protein kinase TEX14C, F, I, L14Homo sapiensMutation(s): 0 
Gene Names: TEX14SGK307
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IWB6 (Homo sapiens)
Explore Q8IWB6 
Go to UniProtKB:  Q8IWB6
PHAROS:  Q8IWB6
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
M [auth B], N [auth F]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.220 
  • R-Value Observed: 0.222 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.913α = 90
b = 102.622β = 90
c = 132.535γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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