hlh-27 encodes a REF-1-like protein with two bHLH domains, that represses lag-2 transcription in ABa descendants (in response to a Notch signal, redundantly with REF-1, HLH-25, HLH-26, HLH-29, and perhaps HLH-28) and tbx-37 transcription in EMS descendants (independently of Notch, redundantly with REF-1, HLH-26, HLH-29, and perhaps HLH-28); lag-2 repression by HLH-27 may require UNC-37; HLH-27's paralogs include HLH-25 through HLH-29 and (more distantly) REF-1; hlh-27 is transcribed in the early MS lineage, probably due to MED-1/2 binding of clustered sites in the hlh-27 promoter region; HLH-27 is expressed in ABp granddaughters ~25 minutes after ABp first contacts an APX-1-expressing cell, and in ABa descendants after a second Notch interaction; HLH-27 is also expressed in four EMS granddaughters (MSaa, MSap, MSpa, MSpp) beginning at the 24-cell stage, in a SKN-1-dependent manner; HLH-27 is required for embryonic viability in mass RNAi assays.
Predicted to enable DNA-binding transcription factor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Predicted to be involved in anterior/posterior pattern specification; regulation of neurogenesis; and regulation of transcription by RNA polymerase II. Predicted to be located in nucleus. Expressed in several structures, including ABpla; ABplp; ABprp; MSaa; and MSpa.
Map position created from combination of previous interpolated map position (based on known location of sequence) and allele information. Therefore this is not a genetic map position based on recombination frequencies or genetic experiments. This was done on advice of the CGC.