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Table 4 Protein distribution by COG functional categories of genomes from bifidobacteria and other groups of human intestinal bacteria (October 2010)

From: Carbohydrate metabolism in Bifidobacteria

COG description

% in Bifidobacterium a

% in Bacteroides a

% in Lactobacillus a

% in Actinobacteriaa

% in Bacteriaa

Translation

6.3993

3.4093

6.9565

3.371

4.2968

RNA processing nd modification

0.0758

0

0

0.0229

0.0148

Transcription

6.5036

4.6561

7.343

7.1218

5.9643

Replication, recombination and repair

6.5131

4.4224

6.1353

4.3295

4.8261

Chromatin structure and dynamics

0

0.0195

0

0.0104

0.0269

Cell cycle control, mitosis and meiosis

1.204

0.565

1.256

0.6397

0.765

Nuclear structure

0

0

0

0

0

Defense mechanisms

2.4649

2.143

2.2222

1.1668

1.259

Signal transduction mechanisms

3.2328

3.4288

2.7536

3.2459

3.9952

Cell wall/membrane biogenesis

3.6405

6.5848

4.3961

2.885

4.3931

Cell motility

0.0948

0.0584

0.2899

0.1722

1.4575

Cytoskeleton

0.0095

0

0

0.0145

0.0116

Extracellular structures

0

0

0

0

0.0154

Intracellular trafficking and secretion

0.7774

1.4027

1.0628

0.6363

1.7757

Posttranslational modification, protein turnover, chaperones

2.5218

1.9287

2.5121

2.2143

2.929

Energy production and conversion

2.3606

3.1366

3.6232

4.8755

4.8217

Carbohydrate transport and metabolism

8.7505

5.1822

8.8889

5.1296

4.9545

Amino acid transport and metabolism

9.5942

4.5782

7.4396

6.9266

7.2726

Nucleotide transport and metabolism

3.1191

1.5196

3.6232

1.6305

1.7769

Coenzyme transport and metabolism

2.3132

2.5716

1.401

2.8294

2.97

Lipid transport and metabolism

1.8771

1.5391

1.7391

5.0221

2.8606

Inorganic ion transport and metabolism

4.3989

4.8704

4.2029

4.3659

4.5898

Secondary metabolites biosynthesis, transport and catabolism

0.493

0.8572

0.5797

4.5415

2.2675

General function prediction only

10.0588

8.5525

10.5797

11.4499

10.4609

Function unknown

4.8066

4.0327

6.9082

4.8

6.14

Not in COGsb

18.7903

34.5412

16.087

22.5988

20.1551

  1. aThese data were retrieved from NCBI (http://www.ncbi.nlm.nih.gov/)
  2. bNot in COGs category includes mainly hypothetical protein