Coding
Part:BBa_K3885124
Designed by: Xue Li Group: iGEM21_ZJUT-China (2021-10-10)
σ28 (fliA)
σ28 is a special transcriptional factor concerning the fliA, which is an alternate sigma factor for the class 3 flagella operons.
Usage and Biology
Figure 1. Sequence logos for the -35 and -10 elements of the σ28-dependent promoter. (A) Sequence recognized by C. trachomatis σ28 RNA polymerase in the context of the C. trachomatis hctB promoter. (B) Sequence recognized by E. coli σ28 RNA polymerase in the same promoter context. (C) The sequence logo based on the nucleotide frequencies of known bacterial σ28 promoters.
Some researches found very similar results for σ28 RNA polymerase from C. trachomatis and E. coli, suggesting that promoter recognition by this alternative RNA polymerase is well conserved among bacteria. Bioinformatic analysis of E. coli s28 promoters suggests that their consensus sequence is TAAAgttt-N11-GCCGATAA. Sequence and Features
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Parameters
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