TrpA

• Description: tryptophan synthase (alpha subunit)
  
  

Gene name	trpA
Synonyms
Essential	no
Product	tryptophan synthase (alpha subunit)
Function	biosynthesis of tryptophan
MW, pI	29 kDa, 4.817
Gene length, protein length	801 bp, 267 aa
Immediate neighbours	hisC, trpB
Get the DNA and protein sequences (Barbe et al., 2009)
Genetic context This image was kindly provided by SubtiList

The gene

Basic information

• Coordinates:

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: L-serine + 1-C-(indol-3-yl)glycerol 3-phosphate = L-tryptophan + glyceraldehyde 3-phosphate + H₂O (according to Swiss-Prot)

• Protein family: UPF0403 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:

Database entries

• Structure:

• Swiss prot entry: P07601

• KEGG entry: BSU22630

• E.C. number: 4.2.1.20

Expression and regulation

• Operon: trpE-trpD-trpC-trpF-trpB-trpA

• Sigma factor: SigA

• Regulation: induction by tryptophan ( TRAP)

• Regulatory mechanism: TRAP: binding to the mRNA in the presence of tryptophan, this results in transcription termination

• Additional information:

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

Gintaras Deikus, Paul Babitzke, David H Bechhofer
Recycling of a regulatory protein by degradation of the RNA to which it binds.
Proc Natl Acad Sci U S A: 2004, 101(9);2747-51
[PubMed:14976255] [WorldCat.org] [DOI] (P p)

D J Henner, L Band, H Shimotsu
Nucleotide sequence of the Bacillus subtilis tryptophan operon.
Gene: 1985, 34(2-3);169-77
[PubMed:3924737] [WorldCat.org] [DOI] (P p)

H Shimotsu, D J Henner
Characterization of the Bacillus subtilis tryptophan promoter region.
Proc Natl Acad Sci U S A: 1984, 81(20);6315-9
[PubMed:6436812] [WorldCat.org] [DOI] (P p)

1. Author1, Author2 & Author3 (year) Title Journal volume: page-page. PubMed