Table 3.

relB homologues

Bacterial speciesrelBgeneaCharacteristic of the RelB protein
No. of aaMolecular mass (kDa)bpIb
Gram-negative bacteria
E. coliK-12 relB K-12 799.14.8
 E. coliK-12 relB SOS c 869.45.2
 E. coli plasmid P307 relB P307 839.24.4
 E. coli plasmid pB171 relB pB171 839.24.1
 S. enterica serovar Typhi relB St1 809.05.2
 P. shigelloides plasmid p11184 relB Ps 839.24.1
 H. influenzae relB Hi 9811.04.7
 V. cholerae relB Vc 828.94.4
 H. pylori relB Hp1 9511.49.8
 H. pylori relB Hp2 9511.410.6
 B. fibrisolvens relB Bf 839.66.6
 A. europaeus relB Ae 879.54.6
 M. morganii relB Mm 839.24.3
 T. ferrooxidans relB Tf 748.54.7
 A. aeolicus relB Aq 809.35.4
 Synechosystis relB Sy 869.94.7
Gram-positive bacteria
 B. thuringiensis relB Bt 8510.14.5
 M. tuberculosis relB Mt1 9310.24.6
 M. tuberculosis relB Mt2 899.85.1
 S. pneumoniae relB Sp1 8710.04.4
 S. pneumoniae relB Sp2 809.24.2
Archaea
 M. jannaschii relB Mj1 829.64.5
 A. fulgidus relB Af1 657.84.8
 A. fulgidus relB Af2 627.44.3
 A. fulgidus relB Af3 728.54.5
 A. fulgidus relB Af4 576.74.1
 P. horikoshiiOT3 relB Pyr 678.03.8
  • a Subscripts refer to the species in which the relB genes were identified (see the species shown in the leftmost column).

  • b Molecular masses and isoelectric points were calculated by using the Wisconsin GCG package.

  • c The relBE SOS system ofE. coli K-12 contains a LexA binding site in the promoter region and may belong to the SOS regulon (48).