Table 2. Predicted KEGG pathways with significantly different abundance (P<0.05) between the coral holobiont (whole community), symbiotic and endosymbiotic communities.

KEGG pathway	Endosymbiont enriched	Symbiotic enriched	Possible function in symbiosis
ABC transporters	✓		Transport of substrates, such as ions, sugars and lipids.
Amino-acid-related enzymes	✓	✓	Synthesis, degradation and utilization of amino acids
DNA repair and recombination proteins	✓		Repair of DNA
Other ion-coupled transporters	✓	✓	Ion transporters involved in environmental information processing
Oxidative phosphorylation	✓		Energy metabolism
Purine metabolism	✓		Nucleic acid metabolism
Pyrimidine metabolism	✓		Nucleic acid metabolism
Ribosome	✓		Translation
Transporters	✓		Transport of substrates, such as ions, sugars and lipids
Bacterial motility proteins		✓	Synthesis of flagellar
Function unknown		✓	Unknown
Secretion system		✓	Secretion of proteins, including those involved in nutrient uptake