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Table 5 Distribution of zinc-, non-heme iron- and copper-binding proteins in the three domains of life

From: On the origin of life in the Zinc world. 2. Validation of the hypothesis on the photosynthesizing zinc sulfide edifices as cradles of life on Earth

 

Zna

Non-heme Feb

Cuc

Bacteria

4.9

3.9

0.3

Archaea

6.0

7.1

0.4

Eukarya

8.8

1.1

0.3

  1. The numbers show the fractions (in %) of proteins with binding sites for Zn, non-heme Fe and Cu, respectively, as related to the total protein content, in the representatives of the three domains of life, determined by application of the same bioinformatics approaches [135].
  2. a – Based on the data from [250];
  3. b – Based on the data from [251];
  4. c – Based on the data from [311];