Transcriptional regulator (PubMed:20940257). Recognizes and binds 2 copies of the core DNA sequence motif 5'-GGGGG-3' (PubMed:20940257). Binds to the HMGN1 promoter and may repress HMGN1 expression (By similarity). Regulates SNCA expression in primary cortical neurons (By similarity). Binds to the COL2A1 promoter and activates COL2A1 expression, as part of a complex with SOX9 (PubMed:20940257). Plays a role in chondrocyte differentiation (PubMed:20940257). Interacts with SOX9 (via C-terminus). Highly expressed in primary chondrocytes, heart, pancreas and testis. Expressed in proliferating chondrocytes in the tibia at embryonic stage 15.5 dpc (at protein level). Expressed in limb buds at stage 11.5 dpc, where it colocalizes with Col2a1 and Sox9. C2H2-type zinc-finger domains 5 and 6 are important for the interaction with SOX9. Belongs to the krueppel C2H2-type zinc-finger protein family.