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hprT
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hprT

trigger enzyme, hypoxanthine phosphoribosyltransferase and part of a transcription activator
locus
BSU_00680
pI
4.60
mw
20.10 kDa
protein length
180 aa Sequence Blast
gene length
543 bp Sequence Blast
function
purine salvage and interconversion, control of [gene|4E7B9426CED372AA8A321A147116A3A589FBF20C|ftsH] expression
product
hypoxanthine phosphoribosyltransferase
essential
no
ec
2.4.2.8
synonyms
Outlinks
KEGGBsubCycSubtiListUniProtExpression Browser

Genomic Context

      

categories

  • [category|SW 2|Metabolism] → [category|SW 2.5|Nucleotide metabolism] → [category|SW 2.5.2|Biosynthesis/ acquisition of nucleotides] → [category|SW 2.5.2.3|Purine salvage and interconversion]
  • [category|SW 3|Information processing] → [category|SW 3.4|Regulation of gene expression] → [category|SW 3.4.2|Transcription factors and their control] → [category|SW 3.4.2.5|Transcription factors/ other]
  • [category|SW 3|Information processing] → [category|SW 3.4|Regulation of gene expression] → [category|SW 3.4.2|Transcription factors and their control] → [category|SW 3.4.2.7|Control of transcription factor (other than two-component system)]
  • [category|SW 3|Information processing] → [category|SW 3.5|Targets of second messengers] → [category|SW 3.5.3|Targets of (p)ppGpp]
  • [category|SW 4|Lifestyles] → [category|SW 4.3|Coping with stress] → [category|SW 4.3.2|Cell envelope stress proteins (controlled by SigM, V, W, X, Y)]

    • Gene

    Coordinates
    76,344 → 76,886

    Phenotypes of a mutant

  • essential [Pubmed|12682299], non-essential according to [Pubmed|28189581]

    • The protein

    Catalyzed reaction/ biological activity

  • diphosphate + IMP --> 5-phospho-α-D-ribose 1-diphosphate + hypoxanthine (according to UniProt)
  • diphosphate + GMP --> 5-phospho-α-D-ribose 1-diphosphate + guanine (according to UniProt)

    • Protein family

  • [SW|Purine/pyrimidine phosphoribosyltransferase family] (according to UniProt)

    • Kinetic information

  • KM (PRPP): 166 µM [pubmed|31552824]
  • KI (pppGpp): 1.7 µM [pubmed|31552824]

    • Effectors of protein activity

  • inhibition of enzymatic activity by (p)ppGpp during the ´stringent response´, (p)ppGpp binds to the acive site of the enzyme and prevents the conversion of the apo-tetramer to the active dimer [Pubmed|31552824,22981860]

    • Structure

  • [PDB|6D9Q] (apo-protein) [pubmed|31552824]
  • [PDB|6D9R] (complex with the substrate PRPP) [pubmed|31552824]
  • [PDB|6D9S] (complex with ppGpp) [pubmed|31552824]

    • [SW|Localization]

  • cytoplasm (according to UniProt)

    • Expression and Regulation

    Operons

    genes
    [gene|473F93EA5ADB78CD23C9C054B5D6B739078DDEEB|tilS]-[gene|B7BFC170EEC88DEC6CF932F80805D3F2C0BD3738|hprT]-[gene|4E7B9426CED372AA8A321A147116A3A589FBF20C|ftsH]
    description
    [Pubmed|18179421]

    sigma factors

  • [protein|081DF3EE9FA56209D648C7677188C61CE3AA8E41|SigM]: sigma factor, [Pubmed|18179421], in [regulon|081DF3EE9FA56209D648C7677188C61CE3AA8E41|SigM regulon]
  • [protein|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA]: sigma factor, [Pubmed|7608085], in [regulon|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA regulon]

    • regulatory mechanism

  • [protein|473F93EA5ADB78CD23C9C054B5D6B739078DDEEB|TilS]: activation, with [protein|B7BFC170EEC88DEC6CF932F80805D3F2C0BD3738|HprT] [Pubmed|24001521], in [regulon|473F93EA5ADB78CD23C9C054B5D6B739078DDEEB|TilS regulon]
  • [protein|B7BFC170EEC88DEC6CF932F80805D3F2C0BD3738|HprT]: activation, with [protein|473F93EA5ADB78CD23C9C054B5D6B739078DDEEB|TilS] [Pubmed|24001521], in [regulon|B7BFC170EEC88DEC6CF932F80805D3F2C0BD3738|HprT regulon]

    • regulation

  • induced by heat shock (class III)

    • additional information

  • the mRNA is very stable (half-life > 15 min) [http://www.ncbi.nlm.nih.gov/sites/entrez/12884008 PubMed]
    • view in new tab

    genes
    [gene|7C8DFE00A2B2B30CC8BEB35055D92CC2E4128F3A|spoIIE]-[gene|C8AA53889FC8B389E1D921B762BD78990C7A8E57|yabS]-[gene|E86A96B832351FF513DD9853EAD8998CC44C9951|yabT]-[gene|473F93EA5ADB78CD23C9C054B5D6B739078DDEEB|tilS]-[gene|B7BFC170EEC88DEC6CF932F80805D3F2C0BD3738|hprT]-[gene|4E7B9426CED372AA8A321A147116A3A589FBF20C|ftsH]
    description
    [pubmed|22383849]

    sigma factors

  • [protein|CFF318EE6CACDEE763FBF96A2ABB46E944679AAA|SigF]: sigma factor, [Pubmed|16497325], in [regulon|CFF318EE6CACDEE763FBF96A2ABB46E944679AAA|SigF regulon]

    • regulation

  • expressed early during sporulation in the forespore ([protein|CFF318EE6CACDEE763FBF96A2ABB46E944679AAA|SigF]) [Pubmed|16497325]
    • view in new tab

    Biological materials

    Mutant

  • BKE00680 (Δ[gene|B7BFC170EEC88DEC6CF932F80805D3F2C0BD3738|hprT]::erm trpC2) available at [http://www.bgsc.org/getdetail.php?bgscid=BKE00680 BGSC], [Pubmed|28189581], upstream reverse: _UP1_CATCATGATTTTGCTTGCCC, downstream forward: _UP4_TGATCGGCAGCCTGCTTCCG
  • BKK00680 (Δ[gene|B7BFC170EEC88DEC6CF932F80805D3F2C0BD3738|hprT]::kan trpC2) available at [http://www.bgsc.org/getdetail.php?bgscid=BKK00680 BGSC], [Pubmed|28189581], upstream reverse: _UP1_CATCATGATTTTGCTTGCCC, downstream forward: _UP4_TGATCGGCAGCCTGCTTCCG

    • References

    Reviews

  • 28031352

    • Original publications

  • 18179421,22981860,24001521,6408059,28189581,31552824