TABLE 10.

Cross-genome comparison of the number of regulatory genes

Genus and strain (clade)No. of:
Sig70-type sigma factorsaType 3 alternative sigma factorsHistidine kinasesResponse regulatorsCRP-type regulatorsYfr2 to -5 ncRNAsYfr1 ncRNAs
Synechococcus
    CC9311 (I)821216481
    CC9605 (II)61712541
    WH8102 (III)61912251c
    CC9902 (IV)61811321
    BL107 (IV)61711421
    WH7803 (V)711415221
    WH7805 (VI)711317421
    RS9917 (VIII)711518521
    RS9916 (IX)711214421
    WH5701 (5.2)721110411
    RCC307 (5.3)801016221
Synechocystis sp. strain PCC68035447b4243c1c
Prochlorococcus
    MED4 (HLI)506634c1c
    MIT9312 (HLII)5066221
    NATL2A (LLI)5066341
    SS120 (LLII)505631c0
    MIT9211 (LLIII)5056210
    MIT9313 (LLIV)7171042c1c
  • a Sig70-type sigma factors include SigA and the complete set of type 2 factors present in these strains.

  • b The total includes 20 hybrid histidine kinases.

  • c Expression and transcript start sites were verified in experiments (10, 309).