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

BMC Genomics

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

Data based on genomics, microarray hybridization results, and validated by polymerase chain reaction and slot blot DNA hybridizations.
*lower estimates of genomic content based on microarray hybridization results and validation methods.
**total conserved gene content = genes shared by all four vesicomyid symbionts included in this study

ISSN: 1471-2164