Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: assay for oligomerization

Macromolecule Content

• Total Structure Weight: 22.94 kDa 
• Atom Count: 1599 
• Modelled Residue Count: 184 
• Deposited Residue Count: 206 
• Unique protein chains: 1

7MJU

Crystal structure of human AF10 PZP bound to histone H3 tail

• PDB DOI: 10.2210/pdb7MJU/pdb

• Classification: PEPTIDE BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli K-12
• Mutation(s): No 


• Deposited: 2021-04-20 Released: 2021-08-04 
• Deposition Author(s): Klein, B.J., Kutateladze, T.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.206 
• R-Value Work: 0.165 
• R-Value Observed: 0.167 

Literature

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

• PubMed: 34226546 
• DOI: 10.1038/s41467-021-24418-9
• Primary Citation of Related Structures:  
  7MJU


• 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.

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Organizational Affiliation: 

Department of Pharmacology, University of Colorado School of Medicine, Aurora, CO, USA. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Histone H3.1,Protein AF-10	A	206	Homo sapiens	Mutation(s): 0  Gene Names:  H3C1, H3FA, HIST1H3A, H3C2, H3FL, HIST1H3B, H3C3, H3FC HIST1H3C, H3C4, H3FB, HIST1H3D, H3C6, H3FD, HIST1H3E, H3C7, H3FI, HIST1H3F, H3C8, H3FH, HIST1H3G, H3C10, H3FK, HIST1H3H, H3C11, H3FF, HIST1H3I, H3C12, H3FJ, HIST1H3J, MLLT10, AF10
UniProt & NIH Common Fund Data Resources
Find proteins for P68431 (Homo sapiens) Explore P68431  Go to UniProtKB:  P68431
PHAROS:  P68431
Find proteins for P55197 (Homo sapiens) Explore P55197  Go to UniProtKB:  P55197
PHAROS:  P55197
UniProt Groups	P68431P55197

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 42.92	α = 90
b = 54.33	β = 106.82
c = 47.78	γ = 90

Software Package:

Software Name	Purpose
XDS	data reduction
Aimless	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2021-04-20 
• Released Date: 2021-08-04 
Deposition Author(s): Klein, B.J., Kutateladze, T.G.

Revision History  

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