PdhD

• Description: dihydrolipoamide dehydrogenase E3 subunit of both pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase complexes
  
  

Gene name	pdhD
Synonyms	citL
Essential	no
Product	dihydrolipoamide dehydrogenase E3 subunit of both pyruvate dehydrogenase and 2-oxoglutarate dehydrogenase complexes
Function	links glycolysis and TCA cycle, enzyme in TCA cycle
Metabolic function and regulation of this protein in SubtiPathways: Central C-metabolism
MW, pI	49 kDa, 4.76
Gene length, protein length	1410 bp, 470 aa
Immediate neighbours	pdhC, slp
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Locus tag: BSU14610

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]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Protein N(6)-(dihydrolipoyl)lysine + NAD⁺ = protein N(6)-(lipoyl)lysine + NADH (according to Swiss-Prot)

• Protein family: class-I pyridine nucleotide-disulfide oxidoreductase family (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 PubMed

• Interactions: OdhA-OdhB-PdhD, PdhA-PdhB-PdhC-PdhD

• Localization: cytoplasm (according to Swiss-Prot)

Database entries

• Structure: 1EBD (complex with binding domain of dihydrolipoamide acetylase, Geobacillus stearothermophilus), 1EBD (complex with binding domain of dihydrolipoamide acetylase, Geobacillus stearothermophilus)

• UniProt: P21880

• KEGG entry: [3]

• E.C. number: 1.8.1.4

Expression and regulation

• • pdhA-pdhB-pdhC-pdhD PubMed
  • pdhC-pdhD PubMed

• Sigma factor:
  • pdhA: SigA PubMed
  • pdhC: SigA PubMed

• Regulation: expression activated by glucose (2.0 fold) PubMed

• Regulatory mechanism:

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion: pGP723 (in pAC5), available in Stülke lab

• GFP fusion:

• two-hybrid system: B. pertussis adenylate cyclase-based bacterial two hybrid system (BACTH), available in Stülke lab

• Antibody:

References

Hans-Matti Blencke, Georg Homuth, Holger Ludwig, Ulrike Mäder, Michael Hecker, Jörg Stülke
Transcriptional profiling of gene expression in response to glucose in Bacillus subtilis: regulation of the central metabolic pathways.
Metab Eng: 2003, 5(2);133-49
[PubMed:12850135] [WorldCat.org] [DOI] (P p)

Haichun Gao, Xin Jiang, Kit Pogliano, Arthur I Aronson
The E1beta and E2 subunits of the Bacillus subtilis pyruvate dehydrogenase complex are involved in regulation of sporulation.
J Bacteriol: 2002, 184(10);2780-8
[PubMed:11976308] [WorldCat.org] [DOI] (P p)

P N Lowe, J A Hodgson, R N Perham
Dual role of a single multienzyme complex in the oxidative decarboxylation of pyruvate and branched-chain 2-oxo acids in Bacillus subtilis.
Biochem J: 1983, 215(1);133-40
[PubMed:6414463] [WorldCat.org] [DOI] (P p)