MtnB

• Description: methylthioribulose-1-phosphate dehydratase
  
  

Gene name	mtnB
Synonyms	ykrY
Essential	no
Product	methylthioribulose-1-phosphate dehydratase
Function	methionine salvage
Metabolic function and regulation of this protein in SubtiPathways: Cys, Met & Sulfate assimilation
MW, pI	23 kDa, 5.686
Gene length, protein length	627 bp, 209 aa
Immediate neighbours	mtnX, mtnD
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU13610

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: S-methyl-5-thio-D-ribulose 1-phosphate = 5-(methylthio)-2,3-dioxopentyl phosphate + H₂O (according to Swiss-Prot)

• Protein family: MtnB subfamily (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization:

Database entries

• Structure:

• Swiss prot entry: O31668

• KEGG entry: [3]

• E.C. number: 4.2.1.109

Expression and regulation

• Operon: mtnW-mtnX-mtnB-mtnD PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • repressed by casamino acids PubMed
  • induced by methionine starvation (S-box) PubMed

• Regulatory mechanism: S-box: transcription termination/ antitermination, the S-box riboswitch binds S-adenosylmethionine resulting in termination PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: