5LHU

ATP Phosphoribosyltransferase from Mycobacterium tuberculosis in complex with the allosteric inhibitor L-Histidine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.02 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Uncoupling conformational states from activity in an allosteric enzyme.

Pisco, J.P.Chiara, C.Pacholarz, K.J.Garza-Garcia, A.Ogrodowicz, R.W.Walker, P.A.Barran, P.E.Smerdon, S.J.Carvalho, L.P.S.

(2017) Nat Commun 8: 203-203

  • DOI: 10.1038/s41467-017-00224-0
  • Primary Citation of Related Structures:  
    5LHT, 5LHU

  • PubMed Abstract: 
  • ATP-phosphoribosyltransferase (ATP-PRT) is a hexameric enzyme in conformational equilibrium between an open and seemingly active state and a closed and presumably inhibited form. The structure-function relationship of allosteric regulation in this system is still not fully understood ...

    ATP-phosphoribosyltransferase (ATP-PRT) is a hexameric enzyme in conformational equilibrium between an open and seemingly active state and a closed and presumably inhibited form. The structure-function relationship of allosteric regulation in this system is still not fully understood. Here, we develop a screening strategy for modulators of ATP-PRT and identify 3-(2-thienyl)-L-alanine (TIH) as an allosteric activator of this enzyme. Kinetic analysis reveals co-occupancy of the allosteric sites by TIH and L-histidine. Crystallographic and native ion-mobility mass spectrometry data show that the TIH-bound activated form of the enzyme closely resembles the inhibited L-histidine-bound closed conformation, revealing the uncoupling between ATP-PRT open and closed conformations and its functional state. These findings suggest that dynamic processes are responsible for ATP-PRT allosteric regulation and that similar mechanisms might also be found in other enzymes bearing a ferredoxin-like allosteric domain.Active and inactive state ATP-phosphoribosyltransferases (ATP-PRTs) are believed to have different conformations. Here the authors show that in both states, ATP-PRT has a similar structural arrangement, suggesting that dynamic alterations are involved in ATP-PRT regulation by allosteric modulators.


    Related Citations: 
    • Mechanism of feedback allosteric inhibition of ATP phosphoribosyltransferase.
      Pedreno, S., Pisco, J.P., Larrouy-Maumus, G., Kelly, G., de Carvalho, L.P.
      (2012) Biochemistry 51: 8027

    Organizational Affiliation

    Mycobacterial Metabolism and Antibiotic Research Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK. luiz.carvalho@crick.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP phosphoribosyltransferaseA294Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: hisGRv2121cMTCY261.17c
EC: 2.4.2.17
UniProt
Find proteins for P9WMN1 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WMN1 
Go to UniProtKB:  P9WMN1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.02 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 117.012α = 90
b = 117.012β = 90
c = 127.332γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
The Francis Crick InstituteUnited Kingdom--

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-21
    Type: Initial release
  • Version 1.1: 2017-09-13
    Changes: Database references
  • Version 1.2: 2019-10-16
    Changes: Data collection