4GO5

The regulatory subunit of aspartate kinase from Mycobacterium tuberculosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

wwPDB Validation 3D Report Full Report



Literature

Structural view of the regulatory subunit of aspartate kinase from Mycobacterium tuberculosis.

Yang, Q.Yu, K.Yan, L.Li, Y.Chen, C.Li, X.

(2011) Protein Cell 2: 745-754

  • DOI: 10.1007/s13238-011-1094-2
  • Primary Citation of Related Structures:  
    4GO5, 4GO7

  • PubMed Abstract: 
  • The aspartate kinase (AK) from Mycobacterium tuberculosis (Mtb) catalyzes the biosynthesis of aspartate family amino acids, including lysine, threonine, isoleucine and methionine. We determined the crystal structures of the regulatory subunit of aspa ...

    The aspartate kinase (AK) from Mycobacterium tuberculosis (Mtb) catalyzes the biosynthesis of aspartate family amino acids, including lysine, threonine, isoleucine and methionine. We determined the crystal structures of the regulatory subunit of aspartate kinase from Mtb alone (referred to as MtbAKβ) and in complex with threonine (referred to as MtbAKβ-Thr) at resolutions of 2.6 Å and 2.0 Å, respectively. MtbAKβ is composed of two perpendicular non-equivalent ACT domains [aspartate kinase, chorismate mutase, and TyrA (prephenate dehydrogenase)] per monomer. Each ACT domain contains two α helices and four antiparallel β strands. The structure of MtbAKβ shares high similarity with the regulatory subunit of the aspartate kinase from Corynebacterium glutamicum (referred to as CgAKβ), suggesting similar regulatory mechanisms. Biochemical assays in our study showed that MtbAK is inhibited by threonine. Based on crystal structure analysis, we discuss the regulatory mechanism of MtbAK.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AspartokinaseX200Mycobacterium tuberculosisMutation(s): 0 
Gene Names: askRv3709cMT3812MTV025.057c
EC: 2.7.2.4
Find proteins for P9WPX3 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WPX3 
Go to UniProtKB:  P9WPX3
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: I 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.791α = 90
b = 64.791β = 90
c = 136.981γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2012-08-18 
  • Released Date: 2012-09-05 
  • Deposition Author(s): Yang, Q., Li, X.

Revision History 

  • Version 1.0: 2012-09-05
    Type: Initial release