SubtiBank SubtiBank
obg
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obg

GTP-binding protein involved in initiation of sporulation and assembly of the 50S ribosome subunit
locus
BSU27920
pI
4.86
mw
47.53 kDa
protein length
428 aa Sequence Blast
gene length
1287 bp Sequence Blast
function
ribosome assembly, may be required to stimulate activity
product
GTP-binding protein
essential
Yes
ec
3.6.5.-
synonyms

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 3.3.1.6|Ribosome assembly]
  • [category|SW 3|Information processing] → [category|SW 3.4|Regulation of gene expression] → [category|SW 3.4.7|phosphorelay]
  • [category|SW 4|Lifestyles] → [category|SW 4.2|Sporulation] → [category|SW 4.2.2|phosphorelay]
  • [category|SW 6|Groups of genes] → [category|SW 6.1|Essential genes]
  • [category|SW 6|Groups of genes] → [category|SW 6.3|GTP-binding proteins]
  • Gene

    Coordinates
    2,852,661 2,853,947

    Phenotypes of a mutant

  • essential [Pubmed|12682299]
  • The protein

    Catalyzed reaction/ biological activity

  • Binds and hydrolyzes GTP and readily exchanges GDP for GTP
  • Protein family

  • GTP1/OBG family (according to Swiss-Prot) Era/Obg family
  • Paralogous protein(s)

  • [protein|959C0ED7B9DA50F0EADCF1565405B878D36DA206|YqeH], [protein|9F6B78C1932FB56F7F71430DB16BC862A312407B|YnbA], [protein|B2270316642C66BC2DA86EBDCD1BF6A33CC6A1DC|YphC], [protein|C0F5FAD6DF89DA9E0FFC8F888D7CED6AA42D9C73|YyaF], [protein|CB68B3393CA7862C45C624AF7B1ADD188243A01F|Era], [protein|DF1A043F3D9817D9479B8C707F4ACEEF2BF2862C|YsxC], [protein|54CD247926F7FABE4ACE85EB7021B62500B47260|RbgA], [protein|66A6EC4F6CB91EE741BB9D7646913FF3EE602BD7|ThdF]
  • [SW|Domains]

  • Obg possesses 3 domains: A N-terminal glycine-rich domain (1158), a GTP binding domain (159342) and a C-terminal TGS domain (343428). The TGS domain has no known function, but it is named for three protein families in which it is found, ThrRS, GTPase, and SpoT.
  • [SW|Cofactors]

  • GDP, GTP and probably ppGpp
  • Structure

  • [PDB|1LNZ] [pubmed|12429099]
  • Additional information

  • The biochemical analysis of bacterial and human Obg proteins combined with the structural observation of the ppGpp nucleotide within the Obg active site suggest a potential role for ppGpp modulation of Obg function in ''B. subtilis''.
  • Expression and Regulation

    Operons

    genes
    [gene|29D91115BB3AC03538D618E54A5A57F92777EFF6|spo0B]-[gene|84E7D672DB40B114DC4D96A4D8834958B47401A7|obg]-[gene|A4B7CF7A1C704C750AFAD97A43AF975260935083|thrR]-[gene|D4CCF6727AAC048792E59717E588C36EB617249D|pheA]
    description
    [Pubmed|22383849]

    sigma factors

  • [protein|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA]: sigma factor, [Pubmed|2537815], in [regulon|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA regulon]
  • additional information

  • expression is repressed by binding of [SW|RpoE] to the A-rich sequence in the -35 region of the promoter [Pubmed|27679485]
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    Biological materials

    Expression vectors

  • for expression/ purification from ''B. subtilis'' with N-terminal Strep-tag, for [SW|SPINE], in [SW|pGP380]: pGP835, available in [SW|Jörg Stülke]'s lab
  • for expression/ purification from ''E. coli'' with N-terminal His-tag, in [SW|pWH844]: pGP843, available in [SW|Jörg Stülke]'s lab
  • labs

  • [SW|Bill Haldenwang], San Antonio, USA
  • [SW|Naotake Ogasawara], Nara, Japan
  • References

    Reviews

  • 19575570,21885683
  • Original publications

  • 15325267,18689482,7961487,7961486,15583165,2537815,10781545,10419966,12427945,12429099,2537815,20830302