>cd06171 Sigma70_r4 Sigma70, region (SR) 4 refers to the most C-terminal of four conserved domains found in Escherichia coli (Ec) sigma70, the main housekeeping sigma, and related sigma-factors (SFs). A SF is a dissociable subunit of RNA polymerase, it directs bacterial or plastid core RNA polymerase to specific promoter elements located upstream of transcription initiation points. The SR4 of Ec sigma70 and other essential primary SFs contact promoter sequences located 35 base-pairs upstream of the initiation point, recognizing a 6-base-pair -35 consensus TTGACA. Sigma70 related SFs also include SFs which are dispensable for bacterial cell growth for example Ec sigmaS, SFs which activate regulons in response to a specific signal for example heat-shock Ec sigmaH, and a group of SFs which includes the extracytoplasmic function (ECF) SFs and is typified by Ec sigmaE which contains SR2 and -4 only. ECF SFs direct the transcription of genes that regulate various responses including periplas

Probab=98.76  E-value=2.2e-08  Score=75.57  Aligned_cols=54  Identities=30%  Similarity=0.398  Sum_probs=50.7

Q ss_pred             HHHHHHHHCCCHHHHHHHHHHHCCCCCCCHHHHHHHHCCCHHHHHHHHHHHHHHHH
Q ss_conf             99999962199999999999827888889899999977899999999999999999
Q gi|254780611|r  226 NMLTRSMSVLNPRERRIFEARRLQENPVTLENLSSEFEVSRERVRQIEARAFKKVQ  281 (302)
Q Consensus       226 ~~L~~~l~~L~~rEr~II~~ry~~~~~~Tl~EIa~~lgiS~eRVrQI~~~AL~kLR  281 (302)
T Consensus         2 ~~l~~al~~L~~~~r~vl~l~y~~~--~s~~EIa~~lgis~~tVk~~l~rA~~~Lr   55 (55)
T cd06171           2 ERLEEALDKLPEREREVILLRFGEG--LSYEEIAEILGISRSTVRQRLHRALKKLR   55 (55)
T ss_pred             HHHHHHHHCCCHHHHHHHHHHHHCC--CCHHHHHHHHCCCHHHHHHHHHHHHHHCC
T ss_conf             8999999839999989899999809--99999999989599999999999998758