This entry represents a domain found in homologues of RsiG protein from Streptomyces. This domain adopts an alpha-helix and in Streptomyces self associates to form a dimer. This dimer binds c-di-GMP via two E(X)3-S(X)2-R(X)3-Q(X)-D repeat motifs, one ...
This entry represents a domain found in homologues of RsiG protein from Streptomyces. This domain adopts an alpha-helix and in Streptomyces self associates to form a dimer. This dimer binds c-di-GMP via two E(X)3-S(X)2-R(X)3-Q(X)-D repeat motifs, one on each helix. The complex RsiG-(c-di-GMP) binds to the sporulation-specific sigma factor, WhiG. Some homologues of RsiG contain a second helix and hence two c-di-GMP binding motifs.
Region 2 of sigma-70 is the most conserved region of the entire protein. All members of this class of sigma-factor contain region 2. The high conservation is due to region 2 containing both the -10 promoter recognition helix and the primary core RNA ...
Region 2 of sigma-70 is the most conserved region of the entire protein. All members of this class of sigma-factor contain region 2. The high conservation is due to region 2 containing both the -10 promoter recognition helix and the primary core RNA polymerase binding determinant. The core binding helix, interacts with the clamp domain of the largest polymerase subunit, beta prime [1,2]. The aromatic residues of the recognition helix, found at the C-terminus of this domain are though to mediate strand separation, thereby allowing transcription initiation [1,2].
Region 4 of sigma-70 like sigma-factors are involved in binding to the -35 promoter element via a helix-turn-helix motif [1]. Due to the way Pfam works, the threshold has been set artificially high to prevent overlaps with other helix-turn-helix fami ...
Region 4 of sigma-70 like sigma-factors are involved in binding to the -35 promoter element via a helix-turn-helix motif [1]. Due to the way Pfam works, the threshold has been set artificially high to prevent overlaps with other helix-turn-helix families. Therefore there are many false negatives.
