SULT1E1 Protein, Human (His, solution)

SULT1E1 protein, a sulfotransferase utilizing 3'-phospho-5'-adenylyl sulfate (PAPS) as a sulfonate donor, plays a pivotal role in estrogen homeostasis by catalyzing the sulfate conjugation of estradiol and estrone, contributing to the inactivation of these hormones. Beyond its primary function in estrogen metabolism, SULT1E1 demonstrates versatility by sulfating dehydroepiandrosterone (DHEA), pregnenolone, (24S)-hydroxycholesterol, and various xenobiotic compounds such as ethinylestradiol, equalenin, diethyl stilbesterol, and 1-naphthol, albeit with lower efficiency. Notably, SULT1E1 does not sulfonate cortisol, testosterone, and dopamine. Moreover, this sulfotransferase may be implicated in gut microbiota-host metabolic interactions, as it O-sulfonates 4-ethylphenol (4-EP), a tyrosine-derived metabolite produced by gut bacteria. The resulting product, 4-EPS, crosses the blood-brain barrier and potentially exerts regulatory effects on oligodendrocyte maturation and myelination, influencing the functional connectivity of brain regions associated with the limbic system. The diverse substrate specificity of SULT1E1 highlights its crucial role in hormonal regulation and suggests its involvement in broader physiological processes, including gut-brain interactions with potential implications for neurological functions.