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Table 1 Number of genes of the different subfamilies present in model organism or deduced for key ancestors of current groups from data of multiple species.

From: Animal HECT ubiquitin ligases: evolution and functional implications

Subfamily

Monosiga brevicollis

Ancestor of all animals

Trichoplax adhaerens

Cnidarian ancestor

Ancestor of protostomes, deuterostomes

Caenorhabditis elegans

Homo sapiens

NEDD4

4

4

4

4

4

3

9 (NEDD4, NEDD4L, WWP1, WWP2, ITCH, SMURF1, SMURF2, NEDL2, NEDL1)

HACE1

0

0

0

0

0

0

1

HUWE1

1

1

1

1

1

1

1

KIAA0317

0

1

2

1

1

0

1

UBE3A/E6-AP

0

1

1

1

1

0

1

HECTX

1

1

1

1

1

0

0

HECTD2

0

1

1

1

1

0

1

Small HERCs

1

1

1

1

1

1

4 (HERC3, HERC4, HERC5, HERC6)

UBE3B/3C

1

2

2

2

2

2

2 (UBE3B, UBE3C)

TRIP12

1

1

1

1

1

0

1

HECTD1

1

1

1

1

1

1

1

EDD/UBR5

1

1

1

1

1

1

1

G2E3

0

0

0

0

0

0

1

KIAA0614

1

1

0

1

1

0

1

HECTD3

0

1

1

2

1

0

1

Large HERCs

1

2

2

2

2

0

2 (HERC1, HERC2)

Not assigned

4*

0

0

0

0

0

0

TOTAL

17

19

19

20

19

9

28

No. subfamilies

10

14

13

14

14

6

15

  1. When several genes of the same family are present in humans, the names are indicated. Otherwise, the single human gene has the same name as the corresponding subfamily. Monosiga contains four genes that cannot be assigned to any subfamily (asterisk). Three of them are detailed in Figure 2. For the fourth (Accession number XM_001748120) only a partial HECT domain was obtained, precluding their inclusion in the phylogenetic analyses.