Table 2

Gene Ontology mappings

(a) Biological process

Categories and subcategories
Representation
% Representation of total

Metabolism

133


75%



     Protein metabolism and modifications


57


32%


          Protein modification



25


14%

          Protein biosynthesis



15


8%

          Protein degradation



14


8%

          Protein folding



3


2%

          Glycoprotein metabolism



1


1%

     Catabolism


24


13%


          Protein degradation



14


8%

          Glycolysis



8


4%

     Phosphate metabolism


23


13%


          Kinase



19


11%

          Phosphatase



4


2%

     Biosynthesis


17


10%


          Protein biosynthesis



15


8%

     Electron transport


21


12%


     Nucleic acid metabolism


16


9%


          Transcription



13


7%

          RNA metabolism



2


1%

          DNA metabolism



1


1%

     Carbohydrate metabolism


11


6%


          Glycolysis



8


4%

     Amino acid and derivative metabolism


4


2%


     One-carbon compound metabolism


3


2%


     Oxygen and radical metabolism


3


2%


     Nitrogen metabolism


1


1%


     Secondary metabolism


1


1%


Transport

24


13%



     Ion transport (including channels)


8


4%


     Protein transport and trafficing


4


2%


     Amino acid transport


2


1%


Cell communication

21


12%



     Signal transduction


20


11%


          Intracellular signaling cascade



14


8%

          Cell surface receptor linked signal transduction



4


2%

     Response to external stimulus


1


1%


(b) Cellular component

Categories and subcategories
Representation
%Representation of total

Cell
79



81%



     Intracellular

62



64%


          Cytoplasm


42



43%

               Ribosome



29



30%
               Cytoskeleton



5



5%
               Mitochondria



5



5%
               Proteasome



2



2%
               Translation factor



1



1%
          Nucleus


15



15%

          Unspecified


3




3%
          Plasma membrane


1




1%
     Membrane

22



23%


          Unspecified


16




16%
          Mitochondrial membrane


4




4%
          Integral membrane


2




2%
Extracellular
15



15%



Unlocalized
3



3%



(c) Molecular function

Categories and subcategories
Representation
% Representation of total

Ligand binding / carrier
135



52%



          Nucleic acid binding

44



17%


          Nucleotide binding

40



15%


          Calcium binding

22



8%


          Protein binding

12



5%


          Carbohydrate binding

7



3%


          Electron transport

3



1%


          Lipid binding

3



1%


          Heavy metal binding

1



<1%


          Oxygen binding

1



<1%


          Oxygen transport

1



<1%


Enzyme
101



39%



          Hydrolase

37



14%


          Transferase

26



10%


          Oxidoreductase

22



8%


          Kinase

15



6%


          Phosphatase

8



3%


          Helicase

4



2%


          Lyase

4



2%


          Aldolase

2



1%


          Ligase

2



1%


          Isomerase

1



<1%


          Monooxygenase

1



<1%


Transporter
14



5%



          Channel/pore

5



2%


          Carrier

4



2%


          Intracellular transporter

3



1%


          Ion transporter

3



1%


          Oxygen transporter

1



<1%


Signal transducer
9



3%



          Receptor

5



2%


          Receptor signaling protein

3



1%


Structural molecule
5



2%



Enzyme regulator
4



2%



Cell adhesion
1



<1%



Motor
1



<1%



Transcriptional regulator
1



<1%




(a) 178 clusters generated 336 multiple mappings. Percentage representation is based on 178. (b) 97 clusters generated 107 multiple mappings. Percentage representation is based on 97. (c) 261 clusters generated 321 multiple mappings. Percentage representation is based on 261.

McCarter et al. Genome Biology 2003 4:R26   doi:10.1186/gb-2003-4-4-r26