Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 6183.12 
• Atom Count: 433 
• Residue Count: 54 
• Unique protein chains: 1

2VXD

The structure of the C-terminal domain of Nucleophosmin

• DOI: 10.2210/pdb2VXD/pdb

• Classification: NUCLEAR PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2008-07-03 Released: 2008-07-15 
• Deposition Author(s): Bycroft, M., Grummitt, C.G.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 150 
• Conformers Submitted: 20 
• Selection Criteria: LEAST RESTRAINT VIOLATION 

Literature

Structural Consequences of Nucleophosmin Mutations in Acute Myeloid Leukemia.

Grummitt, C.G., Townsley, F.M., Johnson, C.M., Warren, A.J., Bycroft, M.

(2008) J.Biol.Chem. 283: 23326

• PubMed: 18511415 
• DOI: 10.1074/jbc.M801706200


• PubMed Abstract: 
  

Mutations affecting NPM1 (nucleophosmin) are the most common genetic lesions found in acute myeloid leukemia (AML). NPM1 is one of the most abundant proteins found in the nucleolus and has links to the MDM2/p53 tumor suppressor pathway. A distinctive feature of NPM1 mutants in AML is their aberrant localization to the cytoplasm of leukemic cells. This mutant phenotype is the result of the substitution of several C-terminal residues, including one or two conserved tryptophan residues, with a leucine-rich nuclear export signal. The exact molecular mechanism underlying the loss of nucleolar retention, and the role of the tryptophans, remains unknown. In this study we have determined the structure of an independently folded globular domain in the C terminus of NPM1 using NMR spectroscopy, and we report that the conserved tryptophans are critical for structure. This domain is necessary for the nucleolar targeting of NPM1 and is disrupted by mutations in AML with cytoplasmic NPM1. Furthermore, we identify conserved surface-exposed lysine residues that are functionally rather than structurally important for nucleolar localization. This study provides new focus for efforts to understand the pathogenesis of AML with cytoplasmic NPM1 and may be used to aid the design of small molecules that target the C-terminal domain of NPM1 to act as novel anti-proliferative and anti-leukemia therapeutics.

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Organizational Affiliation: 

Medical Research Council Centre for Protein Engineering, Cambridge CB2 0QH, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
NUCLEOPHOSMIN	A	54	Homo sapiens	Mutation(s): 0  Gene Names: NPM1 (NPM)
Find proteins for P06748 (Homo sapiens) Go to Gene View: NPM1 Go to UniProtKB:  P06748

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 150 
• Conformers Submitted: 20 
• Selection Criteria: LEAST RESTRAINT VIOLATION 
• Olderado: 2VXD Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-07-03 
• Released Date: 2008-07-15 
• Deposition Author(s): Bycroft, M., Grummitt, C.G.

Revision History 

• Version 1.0: 2008-07-15
  Type: Initial release
• Version 1.1: 2013-07-24
  Type: Database references, Derived calculations, Other, Version format compliance