SULT1E1 Protein, Human (His)

The SULT1E1 protein is a sulfotransferase that critically regulates estrogen homeostasis by sulfating estradiol and estrone, resulting in hormone inactivation. Its versatility extends to sulfated DHEA, pregnenolone, and xenobiotics such as ethinyl estradiol. SULT1E1 Protein, Human (His) is the recombinant human-derived SULT1E1 protein, expressed by E. coli , with N-His labeled tag. The total length of SULT1E1 Protein, Human (His) is 293 a.a., with molecular weight of ~33 kDa.

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.

Measured by its ability to transfer sulfate from PAPS to 1-Napthol. The specific activity is 73.64 pmol/min/μg, as measured under the described conditions.

Human

E. coli

N-His

P49888 (N2-I294)

6783  [NCBI]

Approximately 33 kDa

Greater than 90% as determined by reducing SDS-PAGE

Solution

Supplied as a 0.2 μm filtered solution of 20 mM Tris 0.5 M NaCl, 20% Glycerol, pH 8.0.

<1 EU/μg, determined by LAL method.

N/A.

Stored at -80°C for 1 year. It is stable at -20°C for 3 months after opening. It is recommended to freeze aliquots at -80°C for extended storage. Avoid repeated freeze-thaw cycles.

Shipping with dry ice.