TABLE 7

Ontological analysis of the AHR-TCDD interaction on transcript expression

Ontological analysis used the GOMiner software package (Zeeberg et al., 2003), which performs a two-tailed Fisher's exact test to determine over-representation of GO categories in the gene list relative to the array as a whole. The GO term and name are given, along with the total number of genes in the category and the numbers of over- and underexpressed genes that have this annotation. p values, shown in parentheses, are calculated for enrichment of the term as a whole and for enrichment of the term among over- and underexpressed genes alone. GO categories shown were selected from those showing statistical significance (P < 0.001) in the AHR effect. GO categories shown were selected from those showing statistical significance (p < 0.001) in the AHR-TCDD effect.

GO Total Under Over Name
GO:006725 68 (<10-4) 3 (0.0095) 7 (0.0002) Aromatic compound metabolism
GO:006412 349 (<10-4) 0 (1) 22 (<10-4) Protein biosynthesis
GO:006118 239 (<10-4) 3 (0.1994) 19 (<10-4) Electron transport
GO:0016616 67 (<10-4) 2 (0.0692) 11 (<10-4) Oxidoreductase activity, acting on the CH-OH group of donors, NAD, or NADP as acceptor
GO:009310 39 (<10-4) 4 (0.0001) 3 (0.0315) Amine catabolism
GO:004497 80 (<10-4) 2 (0.0938) 10 (<10-4) Monooxygenase activity
GO:0030529 226 (<10-4) 0 (1) 21 (<10-4) Ribonucleoprotein complex
GO:009058 687 (<10-4) 7 (0.1519) 31 (<10-4) Biosynthesis
GO:0019843 7 (<10-4) 0 (1) 4 (<10-4) rRNA binding
GO:005840 137 (<10-4) 0 (1) 19 (<10-4) Ribosome
GO:005792 85 (<10-4) 2 (0.1039) 12 (<10-4) Microsome
GO:008152 4159 (<10-4) 29 (0.3312) 109 (<10-4) Metabolism
GO:004499 4 (0.0001) 0 (1) 3 (<10-4) Dimethylaniline monooxygenase (N-oxide-forming) activity
GO:0042254 62 (0.0001) 0 (1) 8 (<10-4) Ribosome biogenesis and assembly
GO:007046 59 (0.0001) 0 (1) 8 (<10-4) Ribosome biogenesis
GO:006631 89 (0.0003) 3 (0.0196) 6 (0.0049) Fatty acid metabolism
GO:006519 153 (0.0003) 8 (<10-4) 4 (0.288) Amino acid and derivative metabolism
GO:0015036 15 (0.0004) 0 (1) 4 (0.0001) Disulfide oxidoreductase activity
GO:0016789 76 (0.0005) 0 (1) 8 (0.0001) Carboxylic ester hydrolase activity
GO:004364 16 (0.0005) 0 (1) 4 (0.0001) Glutathione transferase activity
GO:009074 8 (0.0007) 3 (<10-4) 0 (1) Aromatic amino acid family catabolism