This zinc binding domain [1] has four conserved zinc chelating residues in a CHHC pattern. This domain is predicted to have an RNA-binding function [1].

1: A novel CHHC Zn-finger domain found in spliceosomal proteins and tRNA modifying enzymes. Andreeva A, Tidow H; Bioinformatics. 2008;24:2277-2280. PMID:18703587