This family of DNA-binding proteins is likely to act as a transcriptional regulator [1]. This family does not include E.coli AbrB, Swiss:P75747, which belongs to Pfam:PF05145.

1: An AbrB-like protein might be involved in the regulation of cylindrospermopsin production by Aphanizomenon ovalisporum. Shalev-Malul G, Lieman-Hurwitz J, Viner-Mozzini Y, Sukenik A, Gaathon A, Lebendiker M, Kaplan A; Environ Microbiol. 2008;10:988-999. PMID:18093160