KORA is a family of Gram-negative bacterial proteins that act as global repressors of genes involved in plasmid replication, conjugative transfer and stable inheritance in the IncP group of plasmids. KORA operates as a symmetric dimer, and contacts the DNA via the helix-turn-helix region at the N-terminus [1].

1: Crystal structure of KorA bound to operator DNA: insight into repressor cooperation in RP4 gene regulation. Konig B, Muller JJ, Lanka E, Heinemann U; Nucleic Acids Res. 2009;37:1915-1924. PMID:19190096