6ZXB

Diguanylate cyclase DgcR (I-site mutant) in native state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.228 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Activation mechanism of a small prototypic Rec-GGDEF diguanylate cyclase.

Teixeira, R.D.Holzschuh, F.Schirmer, T.

(2021) Nat Commun 12: 2162-2162

  • DOI: https://doi.org/10.1038/s41467-021-22492-7
  • Primary Citation of Related Structures:  
    6ZXB, 6ZXC, 6ZXM

  • PubMed Abstract: 

    Diguanylate cyclases synthesising the bacterial second messenger c-di-GMP are found to be regulated by a variety of sensory input domains that control the activity of their catalytical GGDEF domain, but how activation proceeds mechanistically is, apart from a few examples, still largely unknown. As part of two-component systems, they are activated by cognate histidine kinases that phosphorylate their Rec input domains. DgcR from Leptospira biflexa is a constitutively dimeric prototype of this class of diguanylate cyclases. Full-length crystal structures reveal that BeF 3 - pseudo-phosphorylation induces a relative rotation of two rigid halves in the Rec domain. This is coupled to a reorganisation of the dimeric structure with concomitant switching of the coiled-coil linker to an alternative heptad register. Finally, the activated register allows the two substrate-loaded GGDEF domains, which are linked to the end of the coiled-coil via a localised hinge, to move into a catalytically competent dimeric arrangement. Bioinformatic analyses suggest that the binary register switch mechanism is utilised by many diguanylate cyclases with N-terminal coiled-coil linkers.


  • Organizational Affiliation

    Structural Biology, Biozentrum, University of Basel, Basel, Switzerland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative GGDEF/response regulator receiver domain protein
A, B
293Leptospira biflexa serovar Patoc strain 'Patoc 1 (Paris)Mutation(s): 2 
Gene Names: LEPBI_p0053
UniProt
Find proteins for B0SUI1 (Leptospira biflexa serovar Patoc (strain Patoc 1 / ATCC 23582 / Paris))
Explore B0SUI1 
Go to UniProtKB:  B0SUI1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB0SUI1
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GH3
Query on GH3

Download Ideal Coordinates CCD File 
C [auth A],
L [auth B]
3'-DEOXY-GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
QGYIFQKZZSSUCR-OBXARNEKSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
G [auth A],
H [auth A],
I [auth A],
J [auth A],
P [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
EDO
Query on EDO

Download Ideal Coordinates CCD File 
K [auth A],
Q [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A]
E [auth A]
F [auth A]
M [auth B]
N [auth B]
D [auth A],
E [auth A],
F [auth A],
M [auth B],
N [auth B],
O [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.228 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 136.676α = 90
b = 39.344β = 108.77
c = 146.222γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
iMOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland31003A-166652

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-31
    Type: Initial release
  • Version 1.1: 2021-07-28
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Database references, Refinement description