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Table 2 Number of genes dedicated to each role category in the vesicomyid symbionts.

From: Comparative genomics of vesicomyid clam (Bivalvia: Mollusca) chemosynthetic symbionts

Role Category T. crunogena V. okutanii R. magnifica *C. kilmeri *V. sp. mt-II **Total conserved
Amino acid biosynthesis 92 91 92 92 91 88
Biosynthesis of cofactors, prosthetic groups, and carriers 100 109 107 107 103 101
Cellular processes 185 49 50 50 48 46
Cell envelope 145 64 79 79 63 58
Central intermediary metabolism 78 50 54 54 53 50
DNA metabolism 89 67 68 68 64 64
Energy metabolism 199 181 176 176 172 167
Fatty acid and phospholipids metabolism 37 26 27 27 27 26
Mobile and extrachromosomal element functions 32 0 0 0 0 0
Protein synthesis 141 122 124 124 118 115
Protein fate 130 81 88 88 88 74
Purines, pyrimidines, nucleotides and nucleosides 48 42 42 42 40 40
Regulatory functions 109 24 26 26 24 22
Signal transduction 19 1 1 1 1 1
Transcription 41 31 31 31 29 29
Transport and binding proteins 205 82 84 84 82 80
  1. Data based on genomics, microarray hybridization results, and validated by polymerase chain reaction and slot blot DNA hybridizations.
  2. *lower estimates of genomic content based on microarray hybridization results and validation methods.
  3. **total conserved gene content = genes shared by all four vesicomyid symbionts included in this study