4H0P

Crystal Structure of Acetate Kinase from Cryptococcus neoformans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.894 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structures of acetate kinases from the eukaryotic pathogens Entamoeba histolytica and Cryptococcus neoformans.

Thaker, T.M.Tanabe, M.Fowler, M.L.Preininger, A.M.Ingram-Smith, C.Smith, K.S.Iverson, T.M.

(2013) J.Struct.Biol. 181: 185-189

  • DOI: 10.1016/j.jsb.2012.11.001
  • Primary Citation of Related Structures:  4H0O

  • PubMed Abstract: 
  • Acetate kinases (ACKs) are members of the acetate and sugar kinase/hsp70/actin (ASKHA) superfamily and catalyze the reversible phosphorylation of acetate, with ADP/ATP the most common phosphoryl acceptor/donor. While prokaryotic ACKs have been the su ...

    Acetate kinases (ACKs) are members of the acetate and sugar kinase/hsp70/actin (ASKHA) superfamily and catalyze the reversible phosphorylation of acetate, with ADP/ATP the most common phosphoryl acceptor/donor. While prokaryotic ACKs have been the subject of extensive biochemical and structural characterization, there is a comparative paucity of information on eukaryotic ACKs, and prior to this report, no structure of an ACK of eukaryotic origin was available. We determined the structures of ACKs from the eukaryotic pathogens Entamoeba histolytica and Cryptococcus neoformans. Each active site is located at an interdomain interface, and the acetate and phosphate binding pockets display sequence and structural conservation with their prokaryotic counterparts. Interestingly, the E. histolytica ACK has previously been shown to be pyrophosphate (PP(i))-dependent, and is the first ACK demonstrated to have this property. Examination of its structure demonstrates how subtle amino acid substitutions within the active site have converted cosubstrate specificity from ATP to PP(i) while retaining a similar backbone conformation. Differences in the angle between domains surrounding the active site suggest that interdomain movement may accompany catalysis. Taken together, these structures are consistent with the eukaryotic ACKs following a similar reaction mechanism as is proposed for the prokaryotic homologs.


    Organizational Affiliation

    Department of Biochemistry, Vanderbilt University Medical Center, Nashville, TN 37232, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
acetate kinase
A, B
438Cryptococcus neoformans var. grubii serotype A (strain H99 / ATCC 208821 / CBS 10515 / FGSC 9487)EC: 2.7.2.1
Find proteins for J9W3A6 (Cryptococcus neoformans var. grubii serotype A (strain H99 / ATCC 208821 / CBS 10515 / FGSC 9487))
Go to UniProtKB:  J9W3A6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.894 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.178 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 51.370α = 90.00
b = 107.613β = 99.83
c = 79.108γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
SCALEPACKdata scaling
HKL-2000data reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-05
    Type: Initial release
  • Version 1.1: 2013-02-20
    Type: Database references