Cloning and characterization of mdc genes encoding malonate decarboxylase from Pseudomonas putida

FEMS Microbiol Lett. 1999 May 15;174(2):311-9. doi: 10.1111/j.1574-6968.1999.tb13584.x.


The DNA fragment encoding malonate decarboxylase, involved in malonate assimilation, was cloned from Pseudomonas putida. The 11-kb DNA fragment contained nine open reading frames, which were designated mdcABCDEGHLM in the given order. N-terminal protein sequencing established that the mdcA, mdcC, mdcD, mdcE and mdcH genes encoded subunits alpha, delta, beta, gamma and epsilon of the malonate decarboxylase, respectively. Malonate decarboxylase was functionally expressed in Escherichia coli from plasmid harboring the entire gene cluster or the mdc genes lacking the mdcL and mdcM genes. The mdcL and mdcM genes encode membrane proteins and disruption of the genes of P. putida by the insertion of a kanamycin resistance cassette reduced the malonate uptake activity of the organism. Thus, we conclude that MdcLM is a malonate transporter.

MeSH terms

  • Carboxy-Lyases / genetics*
  • Carboxy-Lyases / metabolism
  • Cosmids / genetics
  • Escherichia coli / enzymology
  • Escherichia coli / genetics
  • Genes, Bacterial
  • Malonates / metabolism*
  • Molecular Sequence Data
  • Multigene Family
  • Physical Chromosome Mapping
  • Plasmids / genetics
  • Pseudomonas putida / enzymology*
  • Pseudomonas putida / genetics
  • Transformation, Bacterial


  • Malonates
  • malonic acid
  • Carboxy-Lyases
  • malonate decarboxylase

Associated data

  • GENBANK/AB017138