Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 39.39 kDa 
• Atom Count: 3472 
• Residue Count: 346 
• Unique protein chains: 1

4BZP

Structure of the Mycobacterium tuberculosis APS kinase CysC in complex with ADP

• DOI: 10.2210/pdb4BZP/pdb

• Classification: TRANSFERASE
• Organism(s): Mycobacterium tuberculosis
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2013-07-29 Released: 2014-08-06 
• Deposition Author(s): Poyraz, O., Lohkamp, B., Schnell, R., Schneider, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.47 Å
• R-Value Free: 0.182 
• R-Value Work: 0.158 
• R-Value Observed: 0.160 

Literature

Crystal Structures of the Kinase Domain of the Sulfate-Activating Complex in Mycobacterium Tuberculosis.

Poyraz, O., Brunner, K., Lohkamp, B., Axelsson, H., Hammarstrom, L.G.J., Schnell, R., Schneider, G.

(2015) PLoS One 10: 21494

• PubMed: 25807013 
• DOI: 10.1371/journal.pone.0121494
• Primary Citation of Related Structures:  
  4RFV, 4BZX, 4BZP, 4BZQ


• PubMed Abstract: 
  

In Mycobacterium tuberculosis the sulfate activating complex provides a key branching point in sulfate assimilation. The complex consists of two polypeptide chains, CysD and CysN. CysD is an ATP sulfurylase that, with the energy provided by the GTPase activity of CysN, forms adenosine-5'-phosphosulfate (APS) which can then enter the reductive branch of sulfate assimilation leading to the biosynthesis of cysteine. The CysN polypeptide chain also contains an APS kinase domain (CysC) that phosphorylates APS leading to 3'-phosphoadenosine-5'-phosphosulfate, the sulfate donor in the synthesis of sulfolipids. We have determined the crystal structures of CysC from M. tuberculosis as a binary complex with ADP, and as ternary complexes with ADP and APS and the ATP mimic AMP-PNP and APS, respectively, to resolutions of 1.5 Å, 2.1 Å and 1.7 Å, respectively. CysC shows the typical APS kinase fold, and the structures provide comprehensive views of the catalytic machinery, conserved in this enzyme family. Comparison to the structure of the human homolog show highly conserved APS and ATP binding sites, questioning the feasibility of the design of specific inhibitors of mycobacterial CysC. Residue Cys556 is part of the flexible lid region that closes off the active site upon substrate binding. Mutational analysis revealed this residue as one of the determinants controlling lid closure and hence binding of the nucleotide substrate.

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Organizational Affiliation: 

Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BIFUNCTIONAL ENZYME CYSN/CYSC	A, B	174	Mycobacterium tuberculosis	Mutation(s): 0  EC: 2.7.1.25 (PDB Primary Data), 2.7.7.4 (UniProt)
Find proteins for A5U1Y4 (Mycobacterium tuberculosis (strain ATCC 25177 / H37Ra)) Explore A5U1Y4  Go to UniProtKB:  A5U1Y4
Find proteins for P9WNM4 (Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)) Explore P9WNM4  Go to UniProtKB:  P9WNM4

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADP	A, B	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
EDO	A	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.47 Å
• R-Value Free: 0.182 
• R-Value Work: 0.158 
• R-Value Observed: 0.160 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 43.63	α = 90
b = 66.33	β = 103.59
c = 61.76	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-07-29 
• Released Date: 2014-08-06 
Deposition Author(s): Poyraz, O., Lohkamp, B., Schnell, R., Schneider, G.

Revision History 

• Version 1.0: 2014-08-06
  Type: Initial release
  
• Version 1.1: 2015-04-08
  Changes: Database references