RT Journal Article SR Electronic(1) A1 Sorokin, Alexei A1 Bolotin, Alexandre A1 Purnelle, Helmut A1 Hilbert, Helmut A1 Lauber, Juergen A1 Düsterhöft, Andreas A1 Ehrlich, S. DuskoYR 1997 T1 Sequence of the Bacillus subtilis genome region in the vicinity of the lev operon reveals two new extracytoplasmic function RNA polymerase sigma factors SigV and SigZ JF Microbiology, VO 143 IS 9 SP 2939 OP 2943 DO https://doi.org/10.1099/00221287-143-9-2939 PB Microbiology Society, SN 1465-2080, AB Summary: Two regions with sizes 18 900 and 25400 bp, which join previously known contigs containing levRDEFG, aadK and bit genes near 235δ of the Bacillus subtilis chromosome, were sequenced. Among others, two genes, which encode proteins homologous to RNA polymerase σ-factors, were identified within this region. The gene products designated SigV and SigZ, show the highest homology with σ-factors encoded by the gene carQ of Myxococcus xanthus and sigX (formerly orfX20) of B. subtilis, correspondingly. All σ-factors which show statistically significant homology to SigV and SigZ, belong to the ECF (extracytoplasmic functions) subfamily. SigV and SigZ do not have N-terminal sequence which prevents such proteins from binding to DNA without RNA polymerase core enzyme., UL https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-143-9-2939