Table 2

Comparison of selenoproteins identified in the Sargasso Sea database and in the combined set of completely sequenced prokaryotic genomes

Prokaryotic selenoprotein family

Sequences in the Sargasso Sea database

Sequences in completely sequenced prokaryotic genomes



Selenoprotein

Cys homolog

Selenoprotein

Cys homolog


Known selenoproteins detected in the Sargasso Sea dataset

SelW-like protein

48

7

4

20

Peroxiredoxin

43

Widespread*

1

Widespread

Proline reductase PrdB

42

1

1

5

Selenophosphate synthetase

28

23

16

22

Prx-like protein

22

4

2

6

Thioredoxin

11

Widespread

2

Widespread

Formate dehydrogenase alpha chain

8

Widespread

40

Widespread

Glutathione peroxidase

5

Widespread

1

Widespread

Glycine reductase selenoprotein A

1

0

5

0

Glycine reductase selenoprotein B

1

1

5

2

New selenoproteins detected in the Sargasso Sea dataset

AhpD-like protein

27

Widespread

0

Widespread

Arsenate reductase

14

Widespread

0

Widespread

Molybdopterin biosynthesis MoeB protein

11

Widespread

0

Widespread

Glutaredoxin

10

17

1

Widespread

DsbA-like protein

9

Widespread

0

Widespread

Glutathione S-transferase

4

Widespread

0

Widespread

Deiodinase-like protein

4

6

0

0

Thiol-disulfide isomerase-like protein

4

Widespread

0

Widespread

CMD domain-containing protein

4

14

0

5

Hypothetical protein 1

4

7

0

5

Rhodanase-related sulfurtransferase

3

Widespread

0

Widespread

OsmC-like protein

3

10

0

17

DsrE-like protein

2

3

1

9

DsbG-like protein

1

Widespread

1

Widespread

NADH:ubiquinone oxidoreductase

1

Widespread

0

Widespread

Known selenoproteins not detected in the Sargasso Sea dataset

Formylmethanofuran dehydrogenase

0

Widespread

4

Widespread

F420-reducing hydrogenase alpha subunit

0

4

4

Widespread

F420-reducing hydrogenase, delta subunit

0

1

3

Widespread

Methylviologen-reducing hydrogenase

0

3

3

Widespread

Heterodisulfide reductase

0

0

4

23

HesB-like protein

0

2

7

2

Total

310

105


*Widespread, occurrence in more than 40 sequences in the Sargasso Sea database or more than 40 in organisms in the combined set of completely sequenced prokaryotic genomes.

Zhang et al. Genome Biology 2005 6:R37   doi:10.1186/gb-2005-6-4-r37

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