Septum (cell biology)

A septum in cell biology is the new cell wall that forms between two daughter cells as a result of cell division.^[1]

In yeast, septins form a ring structure, to which other proteins are recruited.^[2] In particular, chitin synthase 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 using the enzyme 1,3-Beta-glucan synthase, and the primary septum degraded during cell separation. After degradation of the primary septum, a chitinous bud scar remains on both the mother and daughter cell. ^[2][3]