Protein Structure from Scientific Research

Structural comparison of the β′′-SI3 head domain of PEP and cyanobacteria RNAP in complex with sigma. Cyanobacteria residues that interact with sigma are two loops: β′′ residues 626–631 (sequence NKDISL) and 664–668 (sequence NDIL). The corresponding regions ofS. albaPEP are different in sequence: β′′ residues 678–682 (sequence PESSA) and 715–718 (sequence KKRI) respectively. Structure used for comparison is PDB:8GZG. See alsoFigure S6andTable S7.

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