Family member Swiss:P37875 is Bacillus subtilis stage V sporulation protein R, which is involved in spore cortex formation. Little is known about cortex biosynthesis, except that it depends on several sigma E controlled genes, including spoVR. Another family member is an uncharacterized protein YcgB. YcgB has been suggested to be part of a conserved signalling pathway with YeaH and YeaG. This pathway may be involved in nitrogen metabolism (see Supplementary note 5 in.)
Jiyao W et al.(2023). "The conserved domain database in 2023.",