Table 5

Classification of pseudogenes according to their possible origin.

Species

Species-specific duplicationa

Ancestral duplicationb

Function lossc

duplicated

pseudosd

duplicated segmente

retrosf


S. cerevisiae

73

1

3

1

0

1, 6

C. glabrata

27

3

8

1

1

3, 0

Z. rouxii

71

20

14

6

41

1, 3

K. thermotolerans

39

11

18

0

17

0, 16

S. kluyveri

65

23

29

4

13

1, 12

K. lactis

35

12

14

5

7

0, 4

D. hansenii

153

14

8

2

62

1, 3

Y. lipolytica

213

11

6

6

19

2, 8


a. number of pseudogenes originating from mutational inactivation of a duplicated gene copy formed after speciation.

b. number of pseudogenes originating from mutational inactivation of a duplicated gene copy formed before speciation.

c. number of pseudogenes originating from mutational inactivation of a single copy gene.

d. number of duplicated pseudogenes among the first category (a).

e. number of pseudogenes being part of a duplicated segment involving other adjacent genes among the first category (a).

f. number of retro-processed pseudogenes, among the first category (a), identified by: either the presence of a 3' poly(A)-tail (first number) or the proximity of retrotransposon-related sequence (second number). In each species, the candidates identified by these 2 criteria are different.

Lafontaine and Dujon BMC Genomics 2010 11:260   doi:10.1186/1471-2164-11-260

Open Data