Table 1

Gene repertoire of the Buchnera and E. coli genomes and their comparison with the results of the W. pallidipes gene scan based on an E. coli K12 gene array

Functional annotation (COGs)*
Genes in W. pallidipes (gene array)
Genes shared by W. pallidipes and Buchnera
Genes in Buchnera sp. APS (genomic sequence)
Genes in E. coli K12 (genomic sequence)

Information storage and processing




Translation, ribosomal structure and biogenesis
69
62
117
166
Transcription
32
10
16
245
DNA replication, recombination and repair
24
6
40
209
Cellular processes




Cell division and chromosome partitioning
8
6
9
28
Post-translational modification, protein turnover, chaperones
19
13
32
117
Cell envelope biogenesis, outer membrane
28
8
24
200
Cell motility and secretion
21
10
42
136
Inorganic ion transport and metabolism
28
4
16
172
Signal transduction mechanisms
18
1
5
140
Metabolism




Energy production and conversion
54
11
44
266
Carbohydrate transport and metabolism
53
11
31
333
Amino acid transport and metabolism
85
21
55
342
Nucleotide transport and metabolism
20
7
29
88
Coenzyme metabolism
27
13
32
117
Lipid metabolism
14
5
13
84
Secondary metabolite biosynthesis, transport and catabolism
16
2
4
89
Poorly characterized




General function prediction only
42
5
29
302
Function unknown
15
0
20
255
Not in COGs
72
0
6
1000

*Functional annotations are from the Clusters of Orthologous Groups (COGs) database [34].

Zientz et al. Genome Biology 2001 2:reviews1032.1   doi:10.1186/gb-2001-2-12-reviews1032