3QHX

Crystal Structure of Cystathionine gamma-synthase MetB (Cgs) from Mycobacterium ulcerans Agy99 bound to HEPES

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.181 
  • R-Value Work: 0.148 
  • R-Value Observed: 0.150 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history. 


Literature

Structure of the cystathionine [gamma]-synthase MetB from Mycobacterium ulcerans

Clifton, M.C., Abendroth, J., Edwards, T.E., Leibly, D.J., Gillespie, A.K., Ferrell, M., Dieterich, S.H., Exley, I., Staker, B.L., Myler, P.J., Van Voorhis, W.C., Stewart, L.J.

(2011) Acta Crystallogr Sect F Struct Biol Cryst Commun 67: 1154-1158

  • DOI: 10.1107/S1744309111029575
  • Primary Citation of Related Structures:  
    3QI6, 3QHX

  • PubMed Abstract: 

    • Cystathionine γ-synthase (CGS) is a transulfurication enzyme that catalyzes the first specific step in L-methionine biosynthesis by the reaction of O(4)-succinyl-L-homoserine and L-cysteine to produce L-cystathionine and succinate. Controlling the first step in L-methionine biosythesis, CGS is an excellent potential drug target ...

    Cystathionine γ-synthase (CGS) is a transulfurication enzyme that catalyzes the first specific step in L-methionine biosynthesis by the reaction of O(4)-succinyl-L-homoserine and L-cysteine to produce L-cystathionine and succinate. Controlling the first step in L-methionine biosythesis, CGS is an excellent potential drug target. Mycobacterium ulcerans is a slow-growing mycobacterium that is the third most common form of mycobacterial infection, mainly infecting people in Africa, Australia and Southeast Asia. Infected patients display a variety of skin ailments ranging from indolent non-ulcerated lesions as well as ulcerated lesions. Here, the crystal structure of CGS from M. ulcerans covalently linked to the cofactor pyridoxal phosphate (PLP) is reported at 1.9 Å resolution. A second structure contains PLP as well as a highly ordered HEPES molecule in the active site acting as a pseudo-ligand. These results present the first structure of a CGS from a mycobacterium and allow comparison with other CGS enzymes. This is also the first structure reported from the pathogen M. ulcerans.

    Related Citations: 
    • Increasing the structural coverage of tuberculosis drug targets.
      Baugh, L., Phan, I., Begley, D.W., Clifton, M.C., Armour, B., Dranow, D.M., Taylor, B.M., Muruthi, M.M., Abendroth, J., Fairman, J.W., Fox, D., Dieterich, S.H., Staker, B.L., Gardberg, A.S., Choi, R., Hewitt, S.N., Napuli, A.J., Myers, J., Barrett, L.K., Zhang, Y., Ferrell, M., Mundt, E., Thompkins, K., Tran, N., Lyons-Abbott, S., Abramov, A., Sekar, A., Serbzhinskiy, D., Lorimer, D., Buchko, G.W., Stacy, R., Stewart, L.J., Edwards, T.E., Van Voorhis, W.C., Myler, P.J.
      (2015) Tuberculosis (Edinb) 95: 142
    Organizational Affiliation: 

    Seattle Structural Genomics Center for Infectious Disease (SSGCID), USA. mclifton@embios.com



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cystathionine gamma-synthase MetB (Cgs)A, B, C, D392Mycobacterium ulcerans Agy99Mutation(s): 0 
Gene Names: metB, MUL_0201
EC: 2.5.1.48
Find proteins for A0PKT3 (Mycobacterium ulcerans (strain Agy99))
Explore A0PKT3 
Go to UniProtKB:  A0PKT3
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE
Download CCD File 
A
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N		 Ligand Interaction
SO4
Query on SO4
Download CCD File 
A, B, C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
GOL
Query on GOL
Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
NA
Query on NA
Download CCD File 
C
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
LLP
Query on LLP		A,B,C,DL-PEPTIDE LINKINGC14 H22 N3 O7 PLYS
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.963α = 90
b = 106.326β = 113.72
c = 100.548γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
REFMACphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-03-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-09-07
    Changes: Database references, Refinement description
  • Version 1.3: 2012-03-28
    Changes: Database references
  • Version 1.4: 2015-04-22
    Changes: Database references
  • Version 1.5: 2017-11-08
    Changes: Refinement description