Mdh

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  • Description: malate dehydrogenase

Gene name mdh
Synonyms citH
Essential no
Product malate dehydrogenase
Function TCA cycle
Gene expression levels in SubtiExpress: mdh
Interactions involving this protein in SubtInteract: Mdh
Metabolic function and regulation of this protein in SubtiPathways:
Central C-metabolism
MW, pI 33 kDa, 4.727
Gene length, protein length 936 bp, 312 aa
Immediate neighbours phoP, icd
Sequences Protein DNA DNA_with_flanks
Genetic context
Mdh context.gif
This image was kindly provided by SubtiList
Expression at a glance   PubMed
Mdh expression.png















Categories containing this gene/protein

carbon core metabolism, membrane proteins, phosphoproteins

This gene is a member of the following regulons

CcpA regulon, CcpC regulon

The gene

Basic information

  • Locus tag: BSU29120

Phenotypes of a mutant

Database entries

  • DBTBS entry: [1]
  • SubtiList entry: [2]

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity: (S)-malate + NAD+ = oxaloacetate + NADH (according to Swiss-Prot)
  • Protein family: MDH type 3 family (according to Swiss-Prot)
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information: Reversible Michaelis-Menten PubMed
  • Domains:
  • Modification:
    • phosphorylated on Arg-156 PubMed
    • phosphorylation on Ser-149 PubMed
  • Cofactor(s): NAD+
  • Effectors of protein activity:
    • Inhibited by Mg2+, Ca2+, Zn2+, Ag2+ and Hg2+ PubMed PubMed
    • Inhibited by oxaloacetate (above 1mM) and malate (above 7,7mM) PubMed

Database entries

  • Structure: 1EMD (E.coli)
  • KEGG entry: [3]

Additional information

  • The enzyme is a tetramer PubMed
  • extensive information on the structure and enzymatic properties of Mdh can be found at Proteopedia

Expression and regulation

  • Regulatory mechanism:
    • CcpA: transcription repression, CcpC: transcription repression PubMed
    • CcpC: transcription repression (molecular inducer: citrate) PubMed
  • Additional information:

Biological materials

  • Expression vector:
    • pGP385: for expression, purification in E. coli with N-terminal His-tag, in pWH844, available in Jörg Stülke's lab
    • pGP1123 (N-terminal Strep-tag, for SPINE, purification from B. subtilis, in pGP380) (available in Jörg Stülke's lab)
    • pGP1755 (expression / purification of Mdh-S149A, with N-terminal His-tag from E. coli, in pWH844), available in Jörg Stülke's lab
    • pGP1764 (for expression, purification in E. coli with N-terminal Strep-tag, in pGP172, available in Jörg Stülke's lab)
    • GP1438(mdh-Strep (spc)) & GP1440(mdh-Strep (cat)), purification from B. subtilis, for SPINE, available in Jörg Stülke's lab
  • lacZ fusion:
  • two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Jörg Stülke's lab
  • Antibody:

Labs working on this gene/protein

Your additional remarks

References