MccB

• Description: cystathionine lyase/ homocysteine gamma-lyase
  
  

Gene name	mccB
Synonyms	yrhB
Essential	no
Product	cystathionine lyase/ homocysteine gamma-lyase
Function	methionine-to-cysteine conversion
Gene expression levels in SubtiExpress: mccB
Metabolic function and regulation of this protein in SubtiPathways: mccB
MW, pI	40 kDa, 5.215
Gene length, protein length	1137 bp, 379 aa
Immediate neighbours	yrhC, mccA
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, membrane proteins

This gene is a member of the following regulons

CymR regulon, Spx regulon

The gene

Basic information

• Locus tag: BSU27250

Database entries

• BsubCyc: BSU27250

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: L-cystathionine + H₂O = L-cysteine + NH₃ + 2-oxobutanoate (according to Swiss-Prot)

• Protein family: trans-sulfuration enzymes family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization:
  • cell membrane (according to Swiss-Prot)

Database entries

• BsubCyc: BSU27250

• Structure:

• UniProt: O05394

• KEGG entry: [3]

• E.C. number: 4.4.1.1

Expression and regulation

• Operon: yrrT-mtnN-mccA-mccB-yrhC PubMed

• Expression browser: mccB PubMed

• Sigma factor: SigA PubMed

• Regulation:
  • repressed in the presence of cysteine (CymR) PubMed

• Regulatory mechanism:
  • CymR: transcription repression PubMed
  • Spx: transcription activation PubMed

• Additional information:
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 164 PubMed

Biological materials

• Mutant:
  • 1A942 ( mccB::kan), PubMed, available at BGSC
  • 1A945 ( mccB::kan), PubMed, available at BGSC

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody: