ThrB

• Description: homoserine kinase
  
  

Gene name	thrB
Synonyms	thrA
Essential	no
Product	homoserine kinase
Function	biosynthesis of threonine
Gene expression levels in SubtiExpress: thrB
Metabolic function and regulation of this protein in SubtiPathways: thrB
MW, pI	33 kDa, 4.735
Gene length, protein length	927 bp, 309 aa
Immediate neighbours	yuxL, thrC
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

biosynthesis/ acquisition of amino acids

This gene is a member of the following regulons

CodY regulon

The gene

Basic information

• Locus tag: BSU32240

Database entries

• BsubCyc: BSU32240

• DBTBS entry: no entry

• SubtiList entry: [1]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: ATP + L-homoserine = ADP + O-phospho-L-homoserine (according to Swiss-Prot)

• Protein family: Homoserine kinase subfamily (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactors:

• Effectors of protein activity:

• Interactions:

• Localization: cytoplasm (according to Swiss-Prot)

Database entries

• BsubCyc: BSU32240

• Structure: 3HUL (from Listeria monocytogenes, 41% identity, 61% similarity)

• UniProt: P04948

• KEGG entry: [2]

• E.C. number: 2.7.1.39

Expression and regulation

• Operon: hom-thrC-thrB PubMed

• Expression browser: thrB PubMed

• Sigma factor:

• Regulation:
  • repressed by casamino acids PubMed
  • repressed during growth in the presence of branched chain amino acids (CodY) PubMed

• Regulatory mechanism:
  • CodY: transcription repression PubMed

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Allison Kriel, Shaun R Brinsmade, Jessica L Tse, Ashley K Tehranchi, Alycia N Bittner, Abraham L Sonenshein, Jue D Wang
GTP dysregulation in Bacillus subtilis cells lacking (p)ppGpp results in phenotypic amino acid auxotrophy and failure to adapt to nutrient downshift and regulate biosynthesis genes.
J Bacteriol: 2014, 196(1);189-201
[PubMed:24163341] [WorldCat.org] [DOI] (I p)

Ulrike Mäder, Georg Homuth, Christian Scharf, Knut Büttner, Rüdiger Bode, Michael Hecker
Transcriptome and proteome analysis of Bacillus subtilis gene expression modulated by amino acid availability.
J Bacteriol: 2002, 184(15);4288-95
[PubMed:12107147] [WorldCat.org] [DOI] (P p)

C Parsot
Evolution of biosynthetic pathways: a common ancestor for threonine synthase, threonine dehydratase and D-serine dehydratase.
EMBO J: 1986, 5(11);3013-9
[PubMed:3098560] [WorldCat.org] [DOI] (P p)