Crystal structure of human AF10 PZP bound to histone H3 tail

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 

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The role of the PZP domain of AF10 in acute leukemia driven by AF10 translocations.

Klein, B.J.Deshpande, A.Cox, K.L.Xuan, F.Zandian, M.Barbosa, K.Khanal, S.Tong, Q.Zhang, Y.Zhang, P.Sinha, A.Bohlander, S.K.Shi, X.Wen, H.Poirier, M.G.Deshpande, A.J.Kutateladze, T.G.

(2021) Nat Commun 12: 4130-4130

  • DOI: https://doi.org/10.1038/s41467-021-24418-9
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Chromosomal translocations of the AF10 (or MLLT10) gene are frequently found in acute leukemias. Here, we show that the PZP domain of AF10 (AF10 PZP ), which is consistently impaired or deleted in leukemogenic AF10 translocations, plays a critical role in blocking malignant transformation. Incorporation of functional AF10 PZP into the leukemogenic CALM-AF10 fusion prevents the transforming activity of the fusion in bone marrow-derived hematopoietic stem and progenitor cells in vitro and in vivo and abrogates CALM-AF10-mediated leukemogenesis in vivo. Crystallographic, biochemical and mutagenesis studies reveal that AF10 PZP binds to the nucleosome core particle through multivalent contacts with the histone H3 tail and DNA and associates with chromatin in cells, colocalizing with active methylation marks and discriminating against the repressive H3K27me3 mark. AF10 PZP promotes nuclear localization of CALM-AF10 and is required for association with chromatin. Our data indicate that the disruption of AF10 PZP function in the CALM-AF10 fusion directly leads to transformation, whereas the inclusion of AF10 PZP downregulates Hoxa genes and reverses cellular transformation. Our findings highlight the molecular mechanism by which AF10 targets chromatin and suggest a model for the AF10 PZP -dependent CALM-AF10-mediated leukemogenesis.

  • Organizational Affiliation

    Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, USA. tatiana.kutateladze@cuanschutz.edu.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Histone H3.1,Protein AF-10206Homo sapiensMutation(s): 0 
Gene Names: 
UniProt & NIH Common Fund Data Resources
Find proteins for P68431 (Homo sapiens)
Explore P68431 
Go to UniProtKB:  P68431
Find proteins for P55197 (Homo sapiens)
Explore P55197 
Go to UniProtKB:  P55197
GTEx:  ENSG00000078403 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP68431P55197
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.92α = 90
b = 54.33β = 106.82
c = 47.78γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-08-04
    Type: Initial release