This family represents KNL (Kinetochore null) Binding Protein 5 (Kbp-5) from C. elegans which interacts with KNL-1 and it is thought to be homologous to human Zwint and yeast Kre28 [1,2]. Proteins in this family are part of the kinetochore network involved in chromosome segregation. Unlike its homologue Kre28, Kbp-5 has not essential mitotic function.

1: Sos7, an essential component of the conserved Schizosaccharomyces pombe Ndc80-MIND-Spc7 complex, identifies a new family of fungal kinetochore proteins. Jakopec V, Topolski B, Fleig U; Mol Cell Biol. 2012;32:3308-3320. PMID:22711988