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  • Description: required for the anchoring of the TasA amyloid fibers to the cell and for the initiation of fiber polymerization, minor fiber component

Gene name tapA
Synonyms yqhD, yqxM
Essential no
Product TasA anchoring/assembly protein
Function biofilm formation
Gene expression levels in SubtiExpress: tapA
Interactions involving this protein in SubtInteract: TapA
Regulation of this protein in SubtiPathways:
MW, pI 28 kDa, 6.677
Gene length, protein length 759 bp, 253 aa
Immediate neighbours sipW, yqzG
Sequences Protein DNA DNA_with_flanks
Genetic context
YqxM context.gif
This image was kindly provided by SubtiList
Expression at a glance   PubMed
TapA expression.png

Categories containing this gene/protein

biofilm formation, membrane proteins

This gene is a member of the following regulons

AbrB regulon, RemA regulon, SinR regulon

The gene

Basic information

  • Locus tag: BSU24640

Phenotypes of a mutant

The mutants are able to form a biofilm in the presence of D-amino acids PubMed

Database entries

  • DBTBS entry: [1]
  • SubtiList entry: [2]

Additional information

The protein

Basic information/ Evolution

  • Catalyzed reaction/ biological activity:
  • Protein family:
  • Paralogous protein(s):

Extended information on the protein

  • Kinetic information:
  • Domains:
  • Modification:
  • Cofactor(s):
  • Effectors of protein activity: D-amino acids lead to disappearance of TapA from the cell wall PubMed
  • Localization:
    • attached to the cell surface (on the outside of the cell), associated with peptidoglycan PubMed
    • secretion requires SipW PubMed

Database entries

  • Structure:
  • KEGG entry: [3]
  • E.C. number:

Additional information

Expression and regulation

  • Additional information:

Biological materials

  • Mutant:
  • Expression vector:
  • lacZ fusion: pGP1926 (in pAC6), available in Stülke lab
  • GFP fusion:
  • YFP fusion: GP1537 lacA::p(tapA-yfp ermC)
  • two-hybrid system:
  • Antibody:

Labs working on this gene/protein

Your additional remarks



Adam Driks
Tapping into the biofilm: insights into assembly and disassembly of a novel amyloid fibre in Bacillus subtilis.
Mol. Microbiol.: 2011, 80(5);1133-6
[PubMed:21488983] [WorldCat.org] [DOI] (I p)

Original publications

Jared T Winkelman, Anna C Bree, Ashley R Bate, Patrick Eichenberger, Richard L Gourse, Daniel B Kearns
RemA is a DNA-binding protein that activates biofilm matrix gene expression in Bacillus subtilis.
Mol. Microbiol.: 2013, 88(5);984-97
[PubMed:23646920] [WorldCat.org] [DOI] (I p)

Christine Diethmaier, Nico Pietack, Katrin Gunka, Christoph Wrede, Martin Lehnik-Habrink, Christina Herzberg, Sebastian Hübner, Jörg Stülke
A novel factor controlling bistability in Bacillus subtilis: the YmdB protein affects flagellin expression and biofilm formation.
J. Bacteriol.: 2011, 193(21);5997-6007
[PubMed:21856853] [WorldCat.org] [DOI] (I p)

Martin Lehnik-Habrink, Marc Schaffer, Ulrike Mäder, Christine Diethmaier, Christina Herzberg, Jörg Stülke
RNA processing in Bacillus subtilis: identification of targets of the essential RNase Y.
Mol. Microbiol.: 2011, 81(6);1459-73
[PubMed:21815947] [WorldCat.org] [DOI] (I p)

Diego Romero, Hera Vlamakis, Richard Losick, Roberto Kolter
An accessory protein required for anchoring and assembly of amyloid fibres in B. subtilis biofilms.
Mol. Microbiol.: 2011, 80(5);1155-68
[PubMed:21477127] [WorldCat.org] [DOI] (I p)

Ilana Kolodkin-Gal, Diego Romero, Shugeng Cao, Jon Clardy, Roberto Kolter, Richard Losick
D-amino acids trigger biofilm disassembly.
Science: 2010, 328(5978);627-9
[PubMed:20431016] [WorldCat.org] [DOI] (I p)

Yunrong Chai, Thomas Norman, Roberto Kolter, Richard Losick
An epigenetic switch governing daughter cell separation in Bacillus subtilis.
Genes Dev.: 2010, 24(8);754-65
[PubMed:20351052] [WorldCat.org] [DOI] (I p)

Daniel López, Hera Vlamakis, Richard Losick, Roberto Kolter
Paracrine signaling in a bacterium.
Genes Dev.: 2009, 23(14);1631-8
[PubMed:19605685] [WorldCat.org] [DOI] (I p)

Kazuo Kobayashi
SlrR/SlrA controls the initiation of biofilm formation in Bacillus subtilis.
Mol. Microbiol.: 2008, 69(6);1399-410
[PubMed:18647168] [WorldCat.org] [DOI] (I p)

Frances Chu, Daniel B Kearns, Anna McLoon, Yunrong Chai, Roberto Kolter, Richard Losick
A novel regulatory protein governing biofilm formation in Bacillus subtilis.
Mol. Microbiol.: 2008, 68(5);1117-27
[PubMed:18430133] [WorldCat.org] [DOI] (I p)

Yunrong Chai, Frances Chu, Roberto Kolter, Richard Losick
Bistability and biofilm formation in Bacillus subtilis.
Mol. Microbiol.: 2008, 67(2);254-63
[PubMed:18047568] [WorldCat.org] [DOI] (P p)

Mark A Strauch, Benjamin G Bobay, John Cavanagh, Fude Yao, Angelo Wilson, Yoann Le Breton
Abh and AbrB control of Bacillus subtilis antimicrobial gene expression.
J. Bacteriol.: 2007, 189(21);7720-32
[PubMed:17720793] [WorldCat.org] [DOI] (P p)

Frances Chu, Daniel B Kearns, Steven S Branda, Roberto Kolter, Richard Losick
Targets of the master regulator of biofilm formation in Bacillus subtilis.
Mol. Microbiol.: 2006, 59(4);1216-28
[PubMed:16430695] [WorldCat.org] [DOI] (P p)

A G Stöver, A Driks
Control of synthesis and secretion of the Bacillus subtilis protein YqxM.
J. Bacteriol.: 1999, 181(22);7065-9
[PubMed:10559173] [WorldCat.org] (P p)

A G Stöver, A Driks
Regulation of synthesis of the Bacillus subtilis transition-phase, spore-associated antibacterial protein TasA.
J. Bacteriol.: 1999, 181(17);5476-81
[PubMed:10464223] [WorldCat.org] (P p)