Protein arginine kinase McsB in the AMP-PN-bound state

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.235 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report

Ligand Structure Quality Assessment 

This is version 1.5 of the entry. See complete history


Structure of McsB, a protein kinase for regulated arginine phosphorylation.

Suskiewicz, M.J.Hajdusits, B.Beveridge, R.Heuck, A.Vu, L.D.Kurzbauer, R.Hauer, K.Thoeny, V.Rumpel, K.Mechtler, K.Meinhart, A.Clausen, T.

(2019) Nat Chem Biol 15: 510-518

  • DOI: https://doi.org/10.1038/s41589-019-0265-y
  • Primary Citation of Related Structures:  
    6FH1, 6FH2, 6FH3, 6FH4

  • PubMed Abstract: 

    Protein phosphorylation regulates key processes in all organisms. In Gram-positive bacteria, protein arginine phosphorylation plays a central role in protein quality control by regulating transcription factors and marking aberrant proteins for degradation. Here, we report structural, biochemical, and in vivo data of the responsible kinase, McsB, the founding member of an arginine-specific class of protein kinases. McsB differs in structure and mechanism from protein kinases that act on serine, threonine, and tyrosine residues and instead has a catalytic domain related to that of phosphagen kinases (PhKs), metabolic enzymes that phosphorylate small guanidino compounds. In McsB, the PhK-like phosphotransferase domain is structurally adapted to target protein substrates and is accompanied by a novel phosphoarginine (pArg)-binding domain that allosterically controls protein kinase activity. The identification of distinct pArg reader domains in this study points to a remarkably complex signaling system, thus challenging simplistic views of bacterial protein phosphorylation.

  • Organizational Affiliation

    Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein-arginine kinase
A, B
366Geobacillus stearothermophilusMutation(s): 0 
Gene Names: mcsB
Find proteins for P0DMM5 (Geobacillus stearothermophilus)
Explore P0DMM5 
Go to UniProtKB:  P0DMM5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DMM5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.235 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.34α = 90
b = 80.62β = 99.2
c = 97.25γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
Cootmodel building

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-02-06
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Data collection, Structure summary
  • Version 1.2: 2019-04-10
    Changes: Data collection, Database references
  • Version 1.3: 2019-04-17
    Changes: Data collection, Database references
  • Version 1.4: 2019-04-24
    Changes: Data collection, Database references
  • Version 1.5: 2024-01-17
    Changes: Data collection, Database references, Refinement description