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Table 2 Comparison of selenoproteins identified in the Sargasso Sea database and in the combined set of completely sequenced prokaryotic genomes

From: The microbial selenoproteome of the Sargasso Sea

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  
  1. *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.