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queF [2017-07-26 18:51:13]
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queF [2017-07-26 18:51:13]

nitrile reductase (NADPH-dependent 7-cyano-7-deazaguanine reductase), synthesis of the modified ribonucleotide queuosine
locus
BSU13750
pI
4.93
mw
19.23 kDa
protein length
165 aa Sequence Blast
gene length
495 bp Sequence Blast
function
tRNA modification
product
nitrile reductase
essential
no
ec
1.7.1.13
synonyms
ykvM
Outlinks
KEGGBsubCycSubtiListUniProtExpression Browser

Genomic Context

      

categories

  • [category|SW 3|Information processing] → [category|SW 3.3|Protein synthesis, modification and degradation] → [category|SW 3.3.1|Translation] → [category|SW 3.3.1.8|tRNA modification and maturation]

    • Gene

    Coordinates
    1,441,291 → 1,441,788

    The protein

    Catalyzed reaction/ biological activity

  • 7-aminomethyl-7-carbaguanine + 2 NADP+ = 7-cyano-7-carbaguanine + 2 NADPH (according to Swiss-Prot)

    • Protein family

  • QueF type 1 subfamily (according to Swiss-Prot)

    • Modification

  • active site Cys55 is S-bacillithiolated by NaOCl stress [Pubmed|22938038]
  • disulfide formation between the catalytic Cys55 and conserved Cys99 protects the protein from irreversible oxidation [pubmed|28300774]

    • [SW|Cofactors]

  • NADPH [pubmed|28300774]

    • Structure

  • [PDB|4F8B] (covalent thioimide intermediate of the unimodular nitrile reductase [protein|5F96500CC46CC4DAECEBAD34EC50B10548E6D0F9|QueF]) [Pubmed|22787148]

    • [SW|Localization]

  • cytoplasm (according to Swiss-Prot)

    • Expression and Regulation

    Operons

    genes
    [gene|1925DFD1162E744E9175D07EC0FD72A75C79C6BF|queC]-[gene|BA6DD5C9AB9BFF9759E9ECC46CE3DF4EB7E67F52|queD]-[gene|F5189CAA5EF43FCF95E593E095F84B3BE486B347|queE]-[gene|5F96500CC46CC4DAECEBAD34EC50B10548E6D0F9|queF]
    description
    [Pubmed|14660578]

    regulatory mechanism

  • [regulon|preQ1 riboswitch|preQ1 riboswitch]: antitermination, in the absence of queuosine [Pubmed|19285444], in [regulon|preQ1 riboswitch|preQ1 riboswitch]

    • regulation

  • repressed in the presence of queuosine ([SW|preQ1 riboswitch]) [Pubmed|19285444]
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    Biological materials

    Mutant

  • MGNA-B326 (ykvM::erm), available at the [https://shigen.nig.ac.jp/bsub/resource/strainGeneDisrupted/detail/1325 NBRP B. subtilis, Japan]

    • References

  • 22938038,14660578,15767583,16511203,17929836,19285444,17384645,22787148,28300774