MtnA

• Description: 5-methylthioribose-1-phosphate isomerase
  
  

Gene name	mtnA
Synonyms	ykrS, mtnS
Essential	no
Product	5-methylthioribose-1-phosphate isomerase
Function	methionine salvage
Gene expression levels in SubtiExpress: mtnA
Metabolic function and regulation of this protein in SubtiPathways: mtnA
MW, pI	38 kDa, 5.003
Gene length, protein length	1059 bp, 353 aa
Immediate neighbours	ogt, mtnK
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

biosynthesis/ acquisition of amino acids, phosphoproteins, most abundant proteins

This gene is a member of the following regulons

S-box

The gene

Basic information

• Locus tag: BSU13550

Database entries

• BsubCyc: BSU13550

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: S-methyl-5-thio-alpha-D-ribose 1-phosphate = S-methyl-5-thio-D-ribulose 1-phosphate (according to Swiss-Prot)

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

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:
  • phosphorylated on Arg-80 and Arg-298 PubMed

• Cofactors:

• Effectors of protein activity:

• Interactions:

• Localization:

Database entries

• BsubCyc: BSU13550

• Structure: 2YVK

• UniProt: O31662

• KEGG entry: [3]

• E.C. number: 5.3.1.23

Additional information

• subject to Clp-dependent proteolysis upon glucose starvation PubMed

Expression and regulation

• Operon: mtnK-mtnA PubMed

• Expression browser: mtnA PubMed

• Sigma factor: SigA PubMed

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

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

• Additional information:
  • subject to Clp-dependent proteolysis upon glucose starvation PubMed
  • belongs to the 100 most abundant proteins PubMed
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 12320 PubMed
  • number of protein molecules per cell (complex medium with amino acids, without glucose): 15055 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: