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Table 1 amino acid composition of −35 recognition sites of the Bdellovibrio sigma factor gene products compared to E. coli RpoE[8]

From: Mutagenesis of RpoE-like sigma factor genes in Bdellovibrio reveals differential control of groEL and two groES genes

-35 recognition site amino acids in E. coli RpoE

Corresponding amino acid in Bd0743

Corresponding amino acid in Bd0881

R149

R

F

Y156

F*

L

E157

N

K

P166

P

P

G168

D

G

T169

T

T

R171

K*

K*

S172

A

S

R173

A

R

F175

M

S

R176

K*

L

R178

R

R

  1. Many of the residues comprising the −35 recognition site of E. coli RpoE (bold) are not conserved in B. bacteriovorus HD100 (shown as non-bold), suggesting that these RpoE-like proteins may recognise different DNA consensus sequences and correlating with the lack of classical E. coli RpoE consensus sequences in promoters in the B. bacteriovorus HD100 genome. (* = conservative substitution)