Transcription factor (PubMed:21884786, PubMed:23851392). Binds to GC-rich DNA motifs, such as 5'-GGGCGGGG-3' (PubMed:21884786, PubMed:23851392). Involved in cell autonomous neuroblast asymmetric divisions that generate one precursor cell and one apoptotic cell, by transcriptionally activating target genes, such as cell death activator egl-1 and leucine zipper kinase pig-1, in caspase-dependent and -independent apoptotic pathways (PubMed:23851392). Plays a role in the regulation of apoptosis, cell lineage, cell differentiation, embryonic morphogenesis, vulval development, and oocyte production (PubMed:21884786, PubMed:23851392, PubMed:26434722). Expressed ubiquitously in embryos and early larval animals (PubMed:23851392). Expressed in MSpaa in embryos and in the pharyngeal M4 motorneuron at the first larval stage; expression in the M4 neuron and g1A cells decreases during larval development (PubMed:23851392). Strongly expressed in the seam cells and the hyp7 cells (PubMed:23851392). RNAi-mediated knockdown causes defects in cell fate, embryonic morphogenesis, and embryonic and larval lethality (PubMed:21884786, PubMed:23851392). Defects in gastrulation; failure of endodermal E cells to internalize at the 26- to 28-cell stage (PubMed:26434722). Reduces cell cycle lengths significantly in endodermal E cells (PubMed:26434722). Significant reduction in expression of end-1 and end-3, and enhances the disruption of intestinal development in an end-3 mutant background (PubMed:26434722). Reduces number of offspring, and the production of oocytes is compromised (PubMed:21884786). Failure of cell death in pharyngeal M4 motor neuron sister (PubMed:21884786). Belongs to the Sp1 C2H2-type zinc-finger protein family.