5B1I

Crystal structure of K42A mutant of cystathionine beta-synthase from Lactobacillus plantarum in a complex with L-methionine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.238 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic and mutational analyses of cystathionine beta-synthase in the H2 S-synthetic gene cluster in Lactobacillus plantarum

Matoba, Y.Yoshida, T.Izuhara-Kihara, H.Noda, M.Sugiyama, M.

(2017) Protein Sci. 26: 763-783

  • DOI: 10.1002/pro.3123
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cystathionine β-synthase (CBS) catalyzes the formation of l-cystathionine from l-serine and l-homocysteine. The resulting l-cystathionine is decomposed into l-cysteine, ammonia, and α-ketobutylic acid by cystathionine γ-lyase (CGL). This reverse tran ...

    Cystathionine β-synthase (CBS) catalyzes the formation of l-cystathionine from l-serine and l-homocysteine. The resulting l-cystathionine is decomposed into l-cysteine, ammonia, and α-ketobutylic acid by cystathionine γ-lyase (CGL). This reverse transsulfuration pathway, which is catalyzed by both enzymes, mainly occurs in eukaryotic cells. The eukaryotic CBS and CGL have recently been recognized as major physiological enzymes for the generation of hydrogen sulfide (H 2 S). In some bacteria, including the plant-derived lactic acid bacterium Lactobacillus plantarum, the CBS- and CGL-encoding genes form a cluster in their genomes. Inactivation of these enzymes has been reported to suppress H 2 S production in bacteria; interestingly, it has been shown that H 2 S suppression increases their susceptibility to various antibiotics. In the present study, we characterized the enzymatic properties of the L. plantarum CBS, whose amino acid sequence displays a similarity with those of O-acetyl-l-serine sulfhydrylase (OASS) that catalyzes the generation of l-cysteine from O-acetyl-l-serine (l-OAS) and H 2 S. The L. plantarum CBS shows l-OAS- and l-cysteine-dependent CBS activities together with OASS activity. Especially, it catalyzes the formation of H 2 S in the presence of l-cysteine and l-homocysteine, together with the formation of l-cystathionine. The high affinity toward l-cysteine as a first substrate and tendency to use l-homocysteine as a second substrate might be associated with its enzymatic ability to generate H 2 S. Crystallographic and mutational analyses of CBS indicate that the Ala70 and Glu223 residues at the substrate binding pocket are important for the H 2 S-generating activity.


    Organizational Affiliation

    Graduate School of Biomedical and Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima, 734-8551, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cystathionine beta-synthase
A, B, C, D, E, F, G, H
311Lactobacillus plantarum (strain ATCC BAA-793 / NCIMB 8826 / WCFS1)Mutation(s): 1 
Gene Names: cbs
EC: 4.2.1.22
Find proteins for F9UT54 (Lactobacillus plantarum (strain ATCC BAA-793 / NCIMB 8826 / WCFS1))
Go to UniProtKB:  F9UT54
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
AA5
Query on AA5

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
N-[(3-HYDROXY-2-METHYL-5-{[(TRIHYDROXYPHOSPHORANYL)OXY]METHYL}PYRIDIN-4-YL)METHYLENE]METHIONINE
C13 H19 N2 O7 P S
HPCOPQVFKQIVQF-DMSFABOWSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.238 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 165.940α = 90.00
b = 165.940β = 90.00
c = 259.490γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
CNSrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-12-07
    Type: Initial release
  • Version 1.1: 2017-02-15
    Type: Database references
  • Version 1.2: 2017-04-05
    Type: Database references