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ribH [2017-8-11 16:0:3]
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ribH [2017-8-11 16:0:3]

riboflavin synthase (beta subunit)
locus
BSU23250
pI
5.20
mw
16.14 kDa
protein length
154 aa Sequence Blast
gene length
462 bp Sequence Blast
function
riboflavin biosynthesis
product
riboflavin synthase (beta subunit)
essential
no
ec
2.5.1.9
synonyms
Outlinks
KEGGBsubCycSubtiListUniProtExpression Browser

Genomic Context

      

categories

  • [category|SW 2|Metabolism] → [category|SW 2.6|Additional metabolic pathways] → [category|SW 2.6.2|Biosynthesis of cofactors] → [category|SW 2.6.2.2|Biosynthesis/ acquisition of riboflavin/ FAD]

    • Gene

    Coordinates
    2,427,892 → 2,428,356

    The protein

    Catalyzed reaction/ biological activity

  • 2 6,7-dimethyl-8-(1-D-ribityl)lumazine = riboflavin 4-(1-D-ribitylamino)-5-amino-2,6-dihydroxypyrimidine (according to Swiss-Prot)

    • Protein family

  • DMRL synthase family (according to Swiss-Prot)

    • Structure

  • [PDB|1ZIS], [PDB|1RVV] (the [protein|4E18BD4B084094EE4FBC8FE2AC95B14581D20C0F|RibE])3-([protein|2A5DCBFAB51996F0DDEC964D5D178274AF86CE69|RibH])60 lumazine synthase/riboflavin synthase complex) [Pubmed|7473709]

    • Expression and Regulation

    Operons

    genes
    [gene|3DFCF7C5FE15C9A3E9E7E4B0DA8E926B85DBD180|ribD]-[gene|4E18BD4B084094EE4FBC8FE2AC95B14581D20C0F|ribE]-[gene|F07B7062C850106A95C15978E36DA500F8B089D6|ribA]-[gene|2A5DCBFAB51996F0DDEC964D5D178274AF86CE69|ribH]-[gene|8146A052E4E7844F781E7169C264EC927DEB7387|ribT]
    description
    [Pubmed|8159171]

    sigma factors

  • [protein|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA]: sigma factor, [Pubmed|8159171], in [regulon|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA regulon]

    • regulatory mechanism

  • [regulon|FMN-box|FMN-box]: transcription termination, via [SW|FMN-box] in the presence of FMN or FMNH2, this is counter-acted upon binding of [protein|3D32B6C1DC9CAC615B02E14EA846648C3B0E61D6|RibR], in [regulon|FMN-box|FMN-box]

    • regulation

  • expressed in the absence of FMN ([SW|FMN-box]) [Pubmed|15808508]
  • binding of FMN to the [SW|FMN-box] RNA is facilitated by [protein|43CFA3477B4EEB4CE0B2DF63ED2B5EDB171E79C7|NusG]-mediated transcription pausing [pubmed|32817529]
  • the [SW|FMN-box] RNA is degraded by [protein|872CCB5A49C9000BD95E4B0472556D5F60F7D7A4|RNase Y] [pubmed|29794222]
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    References

    Reviews

  • 11395405

    • Original publications

  • 12456892,15808508,7473709,8159171,7934830,3100522,23270261,24442413,26494285