Histone deacetylase complex subunit SAP30L

[Isoform 1]: Functions as transcription repressor, probably via its interaction with histone deacetylase complexes. Involved in the functional recruitment of the class 1 Sin3-histone deacetylase complex (HDAC) to the nucleolus. Binds DNA, apparently without sequence-specificity, and bends bound double-stranded DNA. Binds phosphoinositol phosphates (phosphoinositol 3-phosphate, phosphoinositol 4-phosphate and phosphoinositol 5-phosphate) via the same basic sequence motif that mediates DNA binding and nuclear import.; [Isoform 2]: Functions as transcription repressor; isoform 2 has lower transcription repressor activity than isoform 1 and isoform 3.; [Isoform 3]: Functions as transcription repressor; its activity is marginally lower than that of isoform 1.