HemB

• Description: porphobilinogen synthase
  
  

Gene name	hemB
Synonyms
Essential	no
Product	porphobilinogen synthase
Function	heme biosynthesis
MW, pI	36 kDa, 4.98
Gene length, protein length	972 bp, 324 aa
Immediate neighbours	hemL, hemD
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: BSU28130

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: 2 5-aminolevulinate = porphobilinogen + 2 H₂O (according to Swiss-Prot)

• Protein family: ALADH 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: cytoplasm (according to Swiss-Prot)

Database entries

• Structure:

• Swiss prot entry: P30950

• KEGG entry: [3]

• E.C. number: 4.2.1.24

Expression and regulation

• Operon:

• Sigma factor:

• Regulation:
  • repressed in the absence of hydrogen peroxide (PerR) PubMed

• Regulatory mechanism:
  • PerR: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

A F Herbig, J D Helmann
Roles of metal ions and hydrogen peroxide in modulating the interaction of the Bacillus subtilis PerR peroxide regulon repressor with operator DNA.
Mol Microbiol: 2001, 41(4);849-59
[PubMed:11532148] [WorldCat.org] [DOI] (P p)

Per Johansson, Lars Hederstedt
Organization of genes for tetrapyrrole biosynthesis in gram--positive bacteria.
Microbiology (Reading): 1999, 145 ( Pt 3);529-538
[PubMed:10217486] [WorldCat.org] [DOI] (P p)

M Hansson, L Rutberg, I Schröder, L Hederstedt
The Bacillus subtilis hemAXCDBL gene cluster, which encodes enzymes of the biosynthetic pathway from glutamate to uroporphyrinogen III.
J Bacteriol: 1991, 173(8);2590-9
[PubMed:1672867] [WorldCat.org] [DOI] (P p)