Table 1. Number of exoproteins identified in each functional category from ES mats and ESFC-1 biofilms.
| Categorya | Cyanob ES mat EPS-L | Cyanob ES mat EPS-B | Otherc ES mat EPS-L | Otherc ES mat EPS-B | ESFC-1 EPS-L | ESFC-1 EPS-B |
|---|---|---|---|---|---|---|
| Stress response/redox | 14 | 2 | 4 | 0 | 5 | 7 |
| Amino acids, derivatives | 13 | 0 | 6 | 2 | 13 | 2 |
| Carbohydrates | 13 | 0 | 8 | 3 | 14 | 1 |
| Cell wall, capsule, secreted | 6 | 5 | 0 | 0 | 11 | 7 |
| Protein metabolism | 6 | 0 | 0 | 0 | 14 | 6 |
| N,P,S metabolism | 5 | 3 | 3 | 2 | 7 | 3 |
| Central carbohydrate metabolism | 5 | 1 | 4 | 0 | 5 | 1 |
| DNA, nucleosides, nucleotides | 4 | 1 | 0 | 0 | 7 | 1 |
| Cofactors,vitamins, pigments | 3 | 0 | 0 | 0 | 12 | 2 |
| Protein biosynthesis | 2 | 1 | 0 | 0 | 9 | 1 |
| Respiration | 2 | 0 | 0 | 0 | 4 | 2 |
| CO2 fixation | 2 | 1 | 0 | 0 | 0 | 0 |
| RNA metabolism | 1 | 0 | 0 | 0 | 7 | 1 |
| Photosynthesis | 1 | 1 | 0 | 0 | 3 | 8 |
| Fatty acids, lipids, isoprenoids | 0 | 1 | 1 | 0 | 5 | 0 |
| Regulation, cell signaling | 0 | 0 | 0 | 0 | 1 | 4 |
| Cytoskeleton | 0 | 0 | 0 | 0 | 0 | 1 |
| Unknown or general | 44 | 6 | 3 | 3 | 31 | 40 |
| Total | 122 | 22 | 29 | 11 | 148 | 87 |
Abbreviations: ES, Elkhorn Slough; EPS, extracellular polymeric substance.
a
Functional categories based on a combination of kyoto encyclopedia of genes and genomes (KEGG) and clusters of orthologous groups (COG) categories, manually curated.
b
Exoproteins of cyanobacterial taxonomic classification in the natural mats.
c
Exoproteins of non-cyanobacterial taxonomic classification in the natural mats.