6KY3

Structure of arginine kinase H284A mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.34 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.176 

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Literature

Insight into Structural Aspects of Histidine 284 of Daphnia magna Arginine Kinase.

Rao, Z.Kim, S.Y.Li, X.Kim, D.S.Kim, Y.J.Park, J.H.

(2020) Mol Cells 43: 784-792

  • DOI: 10.14348/molcells.2020.0136
  • Primary Citation of Related Structures:  
    6KY2, 6KY3

  • PubMed Abstract: 
  • Arginine kinase (AK), a bioenergy-related enzyme, is distributed widely in invertebrates. The role of highly conserved histidines in AKs is still unascertained. In this study, the highly conserved histidine 284 (H284) in AK of Daphnia magna ( Dm AK) was replaced with alanine to elucidate the role of H284 ...

    Arginine kinase (AK), a bioenergy-related enzyme, is distributed widely in invertebrates. The role of highly conserved histidines in AKs is still unascertained. In this study, the highly conserved histidine 284 (H284) in AK of Daphnia magna ( Dm AK) was replaced with alanine to elucidate the role of H284. We examined the alteration of catalytic activity and structural changes of H284A in Dm AK. The catalytic activity of H284A was reduced dramatically compared to that in wild type (WT). Thus the crystal structure of H284A displayed several structural changes, including the alteration of D324, a hydrogen-bonding network around H284, and the disruption of π-stacking between the imidazole group of the H284 residue and the adenine ring of ATP. These findings suggest that such alterations might affect a conformational change of the specific loop consisting of G310-V322 at the antiparallel β-sheet region. Thus, we speculated that the H284 residue might play an important role in the conformational change of the specific loop when ATP binds to the substrate-binding site of Dm AK.


    Organizational Affiliation

    Advanced Institute of Environment and Bioscience, College of Environmental & Bioresources Sciences, Jeonbuk National University, Iksan 54596, Korea.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Arginine kinaseA362Daphnia magnaMutation(s): 1 
EC: 2.7.3.3
UniProt
Find proteins for A0A0A7CK57 (Daphnia magna)
Explore A0A0A7CK57 
Go to UniProtKB:  A0A0A7CK57
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0A7CK57
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.34 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.176 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.943α = 90
b = 57.84β = 100.46
c = 74.86γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-16
    Type: Initial release
  • Version 1.1: 2021-03-31
    Changes: Database references