Table 2 Gene Ontology (GO) terms enrichment analyses of GIs in 4 main phylogenetic groups

Cyanobacteria

GO:0015979

Photosynthesis

BP

8.3E-7

4.1E-7

***

GO:0030089

Phycobilisome

CC

3.0E-6

3.2E-6

***

GO:0009898

Internal side of plasma membrane

CC

3.0E-6

3.7E-6

***

GO:0018298

Protein-chromophore linkage

BP

7.0E-4

2.3E-3

***

GO:0009521

Photosystem

CC

7.0E-4

2.3E-3

***

GO:0046914

Transition metal ion binding

MF

1.7E-3

6.7E-3

***

GO:0004175

Endopeptidase activity

MF

1.8E-3

8.5E-3

***

GO:0006508

Proteolysis

BP

3.3E-3

3.0E-2

***

GO:0016740

Transferase activity

MF

3.3E-3

3.0E-2

***

GO:0009236

Cobalamin biosynthetic process

BP

3.4E-3

3.3E-2

***

GO:0022900

Electron transport chain

BP

4.5E-3

5.0E-2

***

GO:0006006

Glucose metabolic process

BP

5.0E-3

5.6E-2

***

GO:0033178

Proton-transporting two-sector ATPase complex

CC

6.1E-3

9.3E-2

**

GO:0042777

Plasma membrane ATP synthesis coupled proton transport

BP

6.1E-3

9.3E-2

**

GO:0046933

Hydrogen ion transporting ATP synthase activity

MF

6.1E-3

9.3E-2

**

GO:0000105

Histidine biosynthetic process

BP

6.1E-3

9.3E-2

**

GO:0043231

Intracellular membrane-bounded organelle

MF

6.1E-3

9.8E-2

**

GO:0016820

Hydrolase activity, acting on acid anhydrides

MF

7.2E-3

1.2E-1

**

Gammaprotebacteria

GO:0009009

Site-specific recombinase activity

MF

7.3E-4

1.8E-4

***

GO:0016874

Ligase activity

MF

7.4E-4

3.7E-4

***

Alphaproteobacteria

GO:0042255

Ribosome assembly

BP

3.3E-9

5.0E-9

***

GO:0003964

RNA-directed DNA polymerase activity

MF

3.6E-4

9.1E-4

***

GO:0003995

Acyl-CoA dehydrogenase activity

MF

4.1E-4

1.1E-3

***

GO:0040011

Locomotion

BP

7.6E-4

2.3E-3

***

GO:0004803

Transposase activity

MF

1.2E-3

3.8E-3

***

GO:0006313

Transposition, DNA-mediated

BP

5.5E-3

2.0E-2

***

Flavobacteria

GO:0015662

ATPase activity, coupled to transmembrane

MF

1.8E-3

1.4E-3

***

movement of ions

GO:0003899

DNA-directed RNA polymerase activity

MF

2.2E-3

2.9E-3

***

GO:0003711

Transcription elongation regulator activity

MF

2.2E-3

1.0E-2

***

GO:0032968

Positive regulation of RNA elongation from

BP

2.2E-3

1.0E-2

***

RNA pol. II promoter

GO:0003924

GTPase activity

MF

3.5E-3

1.8E-2

***

GO:0032549

Ribonucleoside binding

MF

3.7E-3

2.4E-2

***

GO:0031564

Transcription antitermination

BP

3.7E-3

2.4E-2

***

GO:0008135

Translation factor activity, nucleic acid binding

MF

5.0E-3

3.6E-2

***

Non-

GO:0003735

Structural constituent of ribosome

MF

1.3E-9

5.3E-9

***

Marine Bacteroidetes

GO:0006412

Translation

BP

1.3E-9

5.3E-9

***

GO:0019843

rRNA binding

MF

1.3E-9

5.3E-9

***

GO:0015935

Small ribosomal subunit

CC

3.1E-7

2.1E-6

***

GO:0000049

tRNA binding

MF

1.5E-6

1.1E-5

***

GO:0015934

Large ribosomal subunit

CC

1.8E-3

1.4E-2

***

GO:0003917

DNA topoisomerase type I activity

MF

5.3E-3

4.3E-2

***