Function
Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released (By similarity). This sigma factor is involved in regulation of cellulosomal genes via an external polysaccharide-sensing mechanism (Probable). Recognizes the predicted promoters associated with sigI6 itself, xyn11B, xyn10D, xyn10Z, xyn10Y, cel9V, cseP, sigI1, cipA, and rsgI5 (PubMed:26731480).