Everything about Unikont totally explained
| name = Unikonts
| domain =
Eukaryota
| subdivision_ranks = Supergroups
| subdivision =
Opisthokonta
Amoebozoa
}}
Unikont is a
eukaryotic cell with a single
flagellum, at least ancestrally. Current research suggests that a unikont was the ancestor of
opisthokonts (animals, fungi and related forms) and
Amoebozoa, and a
bikont (a eukaryotic cell with two flagella) was the ancestor of
Archaeplastida (plants and relatives),
Excavata,
Rhizaria, and
Chromalveolata.
The unikonts have a triple-gene fusion that's lacking in the bikonts. The three genes that are fused together in the unikonts but not bacteria or bikonts encode enzymes for synthesis of the
pyrimidine nucleotides:
carbamoyl phosphate synthase,
dihydroorotase,
aspartate carbamoyltransferase (Cavalier-Smith 2006). This must have involved a double fusion, a rare pair of events, supporting the shared ancestry of Opisthokonta and Amoebozoa.
The unikonts have a single
centriole (Cavalier-Smith, 2002, 2006). Some unikonts have two centrioles but their origins are developmentally different than in the bikonts, indicating convergent evolution (Cavalier-Smith 2006).
Further Information
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