2KIJ

Solution structure of the Actuator domain of the copper-transporting ATPase ATP7A


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 30 
  • Selection Criteria: target function 

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This is version 1.1 of the entry. See complete history

Literature

Solution structures of the actuator domain of ATP7A and ATP7B, the Menkes and Wilson disease proteins

Banci, L.Bertini, I.Cantini, F.Migliardi, M.Natile, G.Nushi, F.Rosato, A.

(2009) Biochemistry 48: 7849-7855

  • DOI: 10.1021/bi901003k

  • PubMed Abstract: 
  • ATP7A and ATP7B are two human P(1B)-type ATPases that have a crucial role in maintaining copper(I) homeostasis. Among the various domains of these enzymes, one, called the Actuator or A-domain, has a regulatory function and is required for the phosph ...

    ATP7A and ATP7B are two human P(1B)-type ATPases that have a crucial role in maintaining copper(I) homeostasis. Among the various domains of these enzymes, one, called the Actuator or A-domain, has a regulatory function and is required for the phosphatase step of the catalytic cycle (dephosphorylation of the intermediate formed during ATP hydrolysis). Here we report the solution structures of the A-domain of both proteins, solved by heteronuclear NMR spectroscopy and a characterization of the dynamics of the A-domain of ATP7A. We observed that the catalytically important TGE loop protrudes from the structure ready for interaction with the phosphorylated site in the ATP-binding domain. The loop is rigid, suggesting that the catalytic step does not require substantial structural flexibility or rearrangements. The present structures were useful to rationalize the molecular effects of disease-causing mutations. In particular, it can be concluded that mutations occurring in the A-domain either destabilize the fold of the domain (such as Gly860Val in ATP7A) or affect the network of communication within the domain (such as Leu873Arg in ATP7A) or with the other domains of the enzyme (such as Gly853Arg in ATP7A).


    Organizational Affiliation

    Magnetic Resonance Center (CERM)-University of Florence, Via L. Sacconi 6, 50019 Sesto Fiorentino, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Copper-transporting ATPase 1
A
124Homo sapiensMutation(s): 0 
Gene Names: ATP7A (MC1, MNK)
EC: 7.2.2.8
Find proteins for Q04656 (Homo sapiens)
Go to Gene View: ATP7A
Go to UniProtKB:  Q04656
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 30 
  • Selection Criteria: target function 
  • Olderado: 2KIJ Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance