Difference between revisions of "PdhC"

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Revision as of 08:41, 19 April 2012

  • Description: pyruvate dehydrogenase (dihydrolipoamide acetyltransferase E2 subunit)

Gene name pdhC
Synonyms
Essential no
Product pyruvate dehydrogenase
(dihydrolipoamide acetyltransferase E2 subunit)
Function links glycolysis and TCA cycle
Interactions involving this protein in SubtInteract: PdhC
Metabolic function and regulation of this protein in SubtiPathways:
Central C-metabolism
MW, pI 47 kDa, 4.855
Gene length, protein length 1326 bp, 442 aa
Immediate neighbours pdhB, pdhD
Get the DNA and protein sequences
(Barbe et al., 2009)
Genetic context
PdhC context.gif
This image was kindly provided by SubtiList
Expression at a glance   PubMed
PdhC expression.png




























Categories containing this gene/protein

carbon core metabolism, membrane proteins

This gene is a member of the following regulons

stringent response

The gene

Basic information

  • Locus tag: BSU14600

Phenotypes of a mutant

  • defects in sporulation and unable to grow on glucose as single carbon source PubMed

Database entries

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

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity: Acetyl-CoA + enzyme N(6)-(dihydrolipoyl)lysine = CoA + enzyme N(6)-(S-acetyldihydrolipoyl)lysine (according to Swiss-Prot)
  • Protein family: lipoyl-binding domain (according to Swiss-Prot)
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information: Michaelis-Menten PubMed
  • Domains:
  • Modification: phosphorylated (Ser/Thr/Tyr) PubMed
  • Cofactor(s):
  • Effectors of protein activity:
    • Inhibited thiamine 2-thiothiazolone diphosphate and NADH PubMed
    • Low sensibility to NADPH

Database entries

  • Structure: 1W88 (E1 in complex with subunit binding domain of E2, Geobacillus stearothermophilus), 2PDE (peripheral subunit binding domain, Geobacillus stearothermophilus), 1LAC (lipoyl domain, Geobacillus stearothermophilus), 1B5S (catalytic domain (residues 184-425) , Geobacillus stearothermophilus)
  • UniProt: P21883
  • KEGG entry: [3]

Additional information

Expression and regulation

  • Regulation:
    • pdhA: expression activated by glucose (1.9-fold) PubMed
    • subject to negative stringent control upon amino acid limitation PubMed
  • Regulatory mechanism:
    • stringent response: due to presence of guanine at +1 position of the transcript PubMed

Biological materials

  • Mutant:
  • Expression vector:
  • lacZ fusion:
  • GFP fusion:
  • two-hybrid system:
  • Antibody:

Labs working on this gene/protein

Arthur Aronson, Purdue University, West Lafayette, USA homepage

Your additional remarks

References

Reviews

Kai Tittmann
Reaction mechanisms of thiamin diphosphate enzymes: redox reactions.
FEBS J: 2009, 276(9);2454-68
[PubMed:19476487] [WorldCat.org] [DOI] (I p)

U Neveling, S Bringer-Meyer, H Sahm
Gene and subunit organization of bacterial pyruvate dehydrogenase complexes.
Biochim Biophys Acta: 1998, 1385(2);367-72
[PubMed:9655937] [WorldCat.org] [DOI] (P p)

L C Packman, D S Hipps
The structural domains in the E2 component of the pyruvate dehydrogenase multienzyme complex from Bacillus stearothermophilus.
Biochem Soc Trans: 1991, 19(4);917-22
[PubMed:1794583] [WorldCat.org] [DOI] (P p)

M S Patel, T E Roche
Molecular biology and biochemistry of pyruvate dehydrogenase complexes.
FASEB J: 1990, 4(14);3224-33
[PubMed:2227213] [WorldCat.org] [DOI] (P p)

P A Frey
Mechanism of coupled electron and group transfer in Escherichia coli pyruvate dehydrogenase.
Ann N Y Acad Sci: 1982, 378;250-64
[PubMed:6805383] [WorldCat.org] [DOI] (P p)

Original publications