1NH7

ATP PHOSPHORIBOSYLTRANSFERASE (ATP-PRTASE) FROM MYCOBACTERIUM TUBERCULOSIS

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Crystal Structure of ATP Phosphoribosyltransferase from Mycobacterium Tuberculosis

Cho, Y., Sharma, V., Sacchettini, J.C.

(2003) J Biol Chem 278: 8333

  • DOI: 10.1074/jbc.M212124200
  • Primary Citation of Related Structures:  
    1NH7, 1NH8

  • PubMed Abstract: 

    • The N-1-(5'-phosphoribosyl)-ATP transferase catalyzes the first step of the histidine biosynthetic pathway and is regulated by a feedback mechanism by the product histidine. The crystal structures of the N-1-(5'-phosphoribosyl)-ATP transferase from Mycobacterium tuberculosis in complex with inhibitor histidine and AMP has been determined to 1 ...

    The N-1-(5'-phosphoribosyl)-ATP transferase catalyzes the first step of the histidine biosynthetic pathway and is regulated by a feedback mechanism by the product histidine. The crystal structures of the N-1-(5'-phosphoribosyl)-ATP transferase from Mycobacterium tuberculosis in complex with inhibitor histidine and AMP has been determined to 1.8 A resolution and without ligands to 2.7 A resolution. The active enzyme exists primarily as a dimer, and the histidine-inhibited form is a hexamer. The structure represents a new fold for a phosphoribosyltransferase, consisting of three continuous domains. The inhibitor AMP binds in the active site cavity formed between the two catalytic domains. A model for the mechanism of allosteric inhibition has been derived from conformational differences between the AMP:His-bound and apo structures.

    Organizational Affiliation: 

    Department of Biochemistry and Biophysics, Texas A & M University, College Station 77843-2128, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP PhosphoribosyltransferaseA304Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: hisG, Rv2121c, MTCY261.17c
EC: 2.4.2.17
UniProt
Find proteins for P9WMN1 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WMN1 
Go to UniProtKB:  P9WMN1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP9WMN1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.196 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 132.54α = 90
b = 132.54β = 90
c = 110.5γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
SHARPphasing
REFMACrefinement
CCP4data scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-02-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance