spoIIIAG

component of the [protein|search|SpoIIIA]-[protein|3282D2C25468776881778006F182FCF322C4821D|SpoIIQ] type III secretion system residing in the forespore membrane, required for [protein|5F24258282F3166B7696B9E9ABC1706E4D06C944|SigG] activation

locus: BSU_24370

pI: 6.41

mw: 25.34 kDa

protein length: 229 aa

gene length: 690 bp

function: activation of [protein|5F24258282F3166B7696B9E9ABC1706E4D06C944|SigG]

product: component of a type III secretion system

essential: no

synonyms

Genomic Context

categories

• [category|SW 3|Information processing] → [category|SW 3.3|Protein synthesis, modification and degradation] → [category|SW 3.3.5|Protein secretion]
• [category|SW 4|Lifestyles] → [category|SW 4.2|Sporulation] → [category|SW 4.2.1|Sporulation proteins] → [category|SW 4.2.1.4|Sporulation proteins/ other]
• [category|SW 6|Groups of genes] → [category|SW 6.2|Membrane proteins]

Gene

Coordinates: 2,533,010 2,533,699

The protein

Structure

• [PDB|5WC3] [pubmed|28784753]

[SW|Localization]

• membrane protein, in membranes that surround the forespore, this requires [protein|search|SpoIIIAH ]and [protein|search|SpoIIQ ][Pubmed|19609349,18485064]
• forms an oligomeric ring-like conduit in the space between the mother cell and forespore membranes [Pubmed|27681621]

Expression and Regulation

Operons

• genes: [gene|70408C17CF8681998F7FD933D4BFF71D052626D9|yqhV]-[gene|5FE74F270B28A404BFE0DAA4EB243009EEDEACF0|spoIIIAA]-[gene|D20198968665D3726839B2DC7F0638614319B853|spoIIIAB]-[gene|5CDBE6E299C7E6606D3C52E509CFED6F41F1E3F8|spoIIIAC]-[gene|576E36DA79F1ED097D649C35C5B59622FF1CFEF3|spoIIIAD]-[gene|9D4AE9AE191BFA82791549852782DC1B959A6897|spoIIIAE]-[gene|8A8C67AB955660FA41039B45F60A5B9F7B57704E|spoIIIAF]-[gene|5456B0C27EAE89F5B9E750D65E1E3C6EDA27C9FA|spoIIIAG]-[gene|00BDD4E3370DB3A9F4D75FE265A2A8DF05185CCC|spoIIIAH]
  description: [Pubmed|1766372]

  sigma factors

  • [protein|3CB24D493B3282278B7DC61CE3C793DFA815F9E2|SigE]: sigma factor, [Pubmed|15699190,18485064], in [regulon|3CB24D493B3282278B7DC61CE3C793DFA815F9E2|SigE regulon]

  regulatory mechanism

  • [protein|90DCE4F286D2C151D8BDBF0E024E6BBEC94E2397|SpoIIID]: repression, [Pubmed|15383836], in [regulon|90DCE4F286D2C151D8BDBF0E024E6BBEC94E2397|SpoIIID regulon]

  regulation

  • both promoters: expressed during sporulation in the mother cell ([protein|search|SigE]) [Pubmed|18485064], switched off by [SW|SpoIIID] [Pubmed|15383836]

  additional information

  • the internal promoter is essential for sporulation, it is twice as active as the promoter in front of [protein|search|spoIIIAA], suggesting that [protein|search|SpoIIIAG] and [protein|search|SpoIIIAH] are required in larger amounts as compared to the other products of the operon [http://www.ncbi.nlm.nih.gov/sites/entrez/17693505 PubMed]

• genes: [gene|5456B0C27EAE89F5B9E750D65E1E3C6EDA27C9FA|spoIIIAG]-[gene|00BDD4E3370DB3A9F4D75FE265A2A8DF05185CCC|spoIIIAH]
  description: [Pubmed|17693505]

  regulation

  • both promoters: expressed during sporulation in the mother cell ([protein|search|SigE]) [Pubmed|18485064], switched off by [SW|SpoIIID] [Pubmed|15383836]

  additional information

  • the internal promoter is essential for sporulation, it is twice as active as the promoter in front of [protein|search|spoIIIAA], suggesting that [protein|search|SpoIIIAG] and [protein|search|SpoIIIAH] are required in larger amounts as compared to the other products of the operon [http://www.ncbi.nlm.nih.gov/sites/entrez/17693505 PubMed]

• genes: [gene|5FE74F270B28A404BFE0DAA4EB243009EEDEACF0|spoIIIAA]-[gene|D20198968665D3726839B2DC7F0638614319B853|spoIIIAB]-[gene|5CDBE6E299C7E6606D3C52E509CFED6F41F1E3F8|spoIIIAC]-[gene|576E36DA79F1ED097D649C35C5B59622FF1CFEF3|spoIIIAD]-[gene|9D4AE9AE191BFA82791549852782DC1B959A6897|spoIIIAE]-[gene|8A8C67AB955660FA41039B45F60A5B9F7B57704E|spoIIIAF]-[gene|5456B0C27EAE89F5B9E750D65E1E3C6EDA27C9FA|spoIIIAG]-[gene|00BDD4E3370DB3A9F4D75FE265A2A8DF05185CCC|spoIIIAH]
  description: [Pubmed|18485064]

  regulation

  • both promoters: expressed during sporulation in the mother cell ([protein|search|SigE]) [Pubmed|18485064], switched off by [SW|SpoIIID] [Pubmed|15383836]

  additional information

  • the internal promoter is essential for sporulation, it is twice as active as the promoter in front of [protein|search|spoIIIAA], suggesting that [protein|search|SpoIIIAG] and [protein|search|SpoIIIAH] are required in larger amounts as compared to the other products of the operon [http://www.ncbi.nlm.nih.gov/sites/entrez/17693505 PubMed]

Biological materials

Mutant

• BKE24370 ([gene|5456B0C27EAE89F5B9E750D65E1E3C6EDA27C9FA|spoIIIAG]::erm trpC2) available at [http://www.bgsc.org/getdetail.php?bgscid=BKE24370 BGSC], [Pubmed|28189581], upstream reverse: _UP1_TTTTATTCATTGCCGACACT, downstream forward: _UP4_AAAAAAATAAAGGAGGATTC
• BKK24370 ([gene|5456B0C27EAE89F5B9E750D65E1E3C6EDA27C9FA|spoIIIAG]::kan trpC2) available at [http://www.bgsc.org/getdetail.php?bgscid=BKK24370 BGSC], [Pubmed|28189581], upstream reverse: _UP1_TTTTATTCATTGCCGACACT, downstream forward: _UP4_AAAAAAATAAAGGAGGATTC

References

Reviews

• 31350897

Original Publications

• 1766372,18485064,17693505,19609349,27681621,28784753