Tkt

• Description: transketolase
  
  

Gene name	tkt
Synonyms	tktA
Essential	no
Product	transketolase
Function	pentose phosphate pathway
Metabolic function and regulation of this protein in SubtiPathways: Central C-metabolism
MW, pI	72 kDa, 4.803
Gene length, protein length	2001 bp, 667 aa
Immediate neighbours	ynzC, sirA
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: BSU17890

Database entries

• DBTBS entry: [1]

• SubtiList entry: [2]

Categories containing this gene/protein

carbon core metabolism, phosphoproteins

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Sedoheptulose 7-phosphate + D-glyceraldehyde 3-phosphate = D-ribose 5-phosphate + D-xylulose 5-phosphate (according to Swiss-Prot)

• Protein family: transketolase family (according to Swiss-Prot)

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification: phosphorylated on ser/ thr/ tyr PubMed

• Cofactor(s): thiamine pyrophosphate

• Effectors of protein activity:

• Interactions:

• Localization:

Database entries

• Structure: [3K95], complex with thiamine diphosphate, from B. anthracis

• UniProt: P45694

• KEGG entry: [3]

• E.C. number: 2.2.1.1

Expression and regulation

• Operon: tkt PubMed

• Sigma factor:

• Regulation:
  • repressed under conditions that trigger sporulation (Spo0A) PubMed

• Regulatory mechanism:
  • Spo0A: transcription repression PubMed

• Additional information:

Biological materials

• Mutant: BS4530 (aphA3), available in Stülke lab

• Expression vector:
  • pGP94 (N-terminal Strep-tag, for SPINE, expression in B. subtilis, in pGP380), available in Stülke lab
  • for expression, purification in E. coli with N-terminal Strep-tag, in pGP172: pGP820, available in Stülke lab

• lacZ fusion:

• GFP fusion:

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

• Antibody:

References

Reviews

G Schenk, R G Duggleby, P F Nixon
Properties and functions of the thiamin diphosphate dependent enzyme transketolase.
Int J Biochem Cell Biol: 1998, 30(12);1297-318
[PubMed:9924800] [WorldCat.org] [DOI] (P p)

Original publications

Lin Wu, Zhimin Li, Qin Ye
Enhanced D-ribose biosynthesis in batch culture of a transketolase-deficient Bacillus subtilis strain by citrate.
J Ind Microbiol Biotechnol: 2009, 36(10);1289-96
[PubMed:19603213] [WorldCat.org] [DOI] (I p)

Alain Lévine, Françoise Vannier, Cédric Absalon, Lauriane Kuhn, Peter Jackson, Elaine Scrivener, Valérie Labas, Joëlle Vinh, Patrick Courtney, Jérôme Garin, Simone J Séror
Analysis of the dynamic Bacillus subtilis Ser/Thr/Tyr phosphoproteome implicated in a wide variety of cellular processes.
Proteomics: 2006, 6(7);2157-73
[PubMed:16493705] [WorldCat.org] [DOI] (P p)

Yong-Cheol Park, Jin-Ho Choi, George N Bennett, Jin-Ho Seo
Characterization of D-ribose biosynthesis in Bacillus subtilis JY200 deficient in transketolase gene.
J Biotechnol: 2006, 121(4);508-16
[PubMed:16143417] [WorldCat.org] [DOI] (P p)

Yong-Cheol Park, Sung-Gun Kim, Kyungmoon Park, Kelvin H Lee, Jin-Ho Seo
Fed-batch production of D-ribose from sugar mixtures by transketolase-deficient Bacillus subtilis SPK1.
Appl Microbiol Biotechnol: 2004, 66(3);297-302
[PubMed:15375635] [WorldCat.org] [DOI] (P p)

Virginie Molle, Masaya Fujita, Shane T Jensen, Patrick Eichenberger, José E González-Pastor, Jun S Liu, Richard Losick
The Spo0A regulon of Bacillus subtilis.
Mol Microbiol: 2003, 50(5);1683-701
[PubMed:14651647] [WorldCat.org] [DOI] (P p)

T Schiött, C von Wachenfeldt, L Hederstedt
Identification and characterization of the ccdA gene, required for cytochrome c synthesis in Bacillus subtilis.
J Bacteriol: 1997, 179(6);1962-73
[PubMed:9068642] [WorldCat.org] [DOI] (P p)