tasA [2017-10-15 16:53:54]

major component of biofilm matrix, forms amyloid fibers

locus: BSU24620

pI: 5.44

mw: 28.15 kDa

protein length: 261 aa

gene length: 783 bp

function: biofilm formation

product: major component of biofilm matrix

essential: no

synonyms: cotN,yqhF

Genomic Context

categories

• [category|SW 4|Lifestyles] → [category|SW 4.1|Exponential and early post-exponential lifestyles] → [category|SW 4.1.2|Biofilm formation]
• [category|SW 4|Lifestyles] → [category|SW 4.1|Exponential and early post-exponential lifestyles] → [category|SW 4.1.2|Biofilm formation] → [category|SW 4.1.2.2|Amyloid protein synthesis, secretion and assembly]
• [category|SW 6|Groups of genes] → [category|SW 6.12|Secreted proteins]

Gene

Coordinates: 2,553,081 → 2,553,866

Phenotypes of a mutant

• altered cell death pattern in colonies [Pubmed|23012477]

The protein

Catalyzed reaction/ biological activity

• forms amyloid fibers that bind cells together in the biofilm [Pubmed|20080671]

Protein family

• peptidase M73 family (according to Swiss-Prot)

[SW|Localization]

• extracellular (signal peptide) [Pubmed|18957862], secretion requires [protein|09B082BF39703F0D9A5980E643175DBD59F5B228|SipW] [Pubmed|10049401]
• membrane [Pubmed|18763711]

Expression and Regulation

Operons

• genes: [gene|8C13E1EF5437DD8F9906643DEDCBB18DABE3B9E3|tapA]-[gene|09B082BF39703F0D9A5980E643175DBD59F5B228|sipW]-[gene|BF97457E986656E4A9FE7A858F5BDF1759850D5C|tasA]
  description: [Pubmed|16430695]

  sigma factors

  • [protein|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA]: sigma factor, [Pubmed|16430695], in [regulon|360F48D576DE950DF79C1A2677B7A35A8D8CC30C|SigA regulon]

  regulatory mechanism

  • [protein|E5110D9C36E8C55AFD1419987B14A53232165F20|AbrB]: repression, [PubMed|10464223,17720793], in [regulon|E5110D9C36E8C55AFD1419987B14A53232165F20|AbrB regulon]
  • [protein|5A6FBAE6553343092862CB79E150F934978C32A9|SinR]: repression, [Pubmed|16430695], in [regulon|5A6FBAE6553343092862CB79E150F934978C32A9|SinR regulon]
  • [protein|6AF1CB8998BE9C71DF4F1201A7F74FF7E75CB799|RemA]: activation, [Pubmed|23646920], in [regulon|6AF1CB8998BE9C71DF4F1201A7F74FF7E75CB799|RemA regulon]
  • [protein|E6F3BAC5875A16D8D75B2AD21447C14DD17B3DA6|LutR]: activation, [Pubmed|24196425], in [regulon|E6F3BAC5875A16D8D75B2AD21447C14DD17B3DA6|LutR regulon]

  regulation

  • repressed by casamino acids [Pubmed|12107147]

  additional information

  • induction by sequestration of [protein|5A6FBAE6553343092862CB79E150F934978C32A9|SinR] by [protein|24D6A7DDCB25B99FBB670E9203F826596916B35C|SinI] or [protein|C17C296F3EB2E106C380E3B5D784F3FA63F4C9B7|SlrA] [PubMed|15661000,19788541] or by SlrR [PubMed|20351052]
  • expression of the operon is localized to a ring near the periphery of the biofilm [pubmed|29590605]

Biological materials

Mutant

• MGNA-C449 (yqhF::erm), available at the [https://shigen.nig.ac.jp/bsub/resource/strainGeneDisrupted/detail/2447 NBRP B. subtilis, Japan]
• BKE24620 (Δ[gene|BF97457E986656E4A9FE7A858F5BDF1759850D5C|tasA]::erm trpC2) available at [http://www.bgsc.org/getdetail.php?bgscid=BKE24620 BGSC], [Pubmed|28189581], upstream reverse: _UP1_CATGGTAAGCTCCCCTTTTA, downstream forward: _UP4_TAATAACAGCAAAAAAAAGA
• BKK24620 (Δ[gene|BF97457E986656E4A9FE7A858F5BDF1759850D5C|tasA]::kan trpC2) available at [http://www.bgsc.org/getdetail.php?bgscid=BKK24620 BGSC], [Pubmed|28189581], upstream reverse: _UP1_CATGGTAAGCTCCCCTTTTA, downstream forward: _UP4_TAATAACAGCAAAAAAAAGA

References

Reviews

• 20735481,20351052,21488983,24988880,25907113,26418850,28783117

Original publications

• 23352144,23352134,23632024,23012477,21815947,21856853,18047568,16430695,16430696,10368135,18430133,18647168,10464223,17720793,18957862,12107147,18763711,20080671,10049401,23646920,24488317,25894589