Septum (cell biology)

Septum (cell biology)

Septins in Saccharomyces cerevisiae (fluorescent micrograph)
• Green: septins (AgSEP7-GFP)
• Red: cell outline (phase contrast)
• Scale bar: 10 μm

A septum in cell biology is the new cell wall that forms between two daughter cells during cell division.

In yeast, septins form a ring structure, to which other proteins are recruited.[1] In particular, chitinase 2 is required, an enzyme that synthesises chitin thereby building up the primary septum. A secondary septum of β-glucans and mannoproteins is then assembled, and the primary septum degraded during cell separation.[2][1]


  1. ^ a b Cabib E, Roh DH, Schmidt M, Crotti LB, Varma A (2001). "The yeast cell wall and septum as paradigms of cell growth and morphogenesis". J. Biol. Chem. 276 (23): 19679–82.  
  2. ^ Lesage G, Bussey H (2006). "Cell wall assembly in Saccharomyces cerevisiae". Microbiol. Mol. Biol. Rev. 70 (2): 317–43.