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S1950

Sigma-Aldrich

STX64

≥98% (HPLC)

Synonym(s):

667 Coumate, BN 83495

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About This Item

Empirical Formula (Hill Notation):
C14H15NO5S
CAS Number:
288628-05-7
Molecular Weight:
309.34
MDL number:
MFCD12912443
UNSPSC Code:
51111800
PubChem Substance ID:
329824496
NACRES:
NA.77

Assay

≥98% (HPLC)

form

powder

color

white

solubility

DMSO: >20 mg/mL

storage temp.

2-8°C

SMILES string

NS(=O)(=O)Oc1ccc2C3=C(CCCCC3)C(=O)Oc2c1

InChI

1S/C14H15NO5S/c15-21(17,18)20-9-6-7-11-10-4-2-1-3-5-12(10)14(16)19-13(11)8-9/h6-8H,1-5H2,(H2,15,17,18)

InChI key

DSLPMJSGSBLWRE-UHFFFAOYSA-N

Gene Information

human ... STS(412)

Biochem/physiol Actions

STX64 is a potent, irreversible inhibitor of steroid sulfatase. Inhibition of steroid sulfatase (STS), the enzyme responsible for the hydrolysis of steroid sulfates, represents a potential novel treatment for postmenopausal women with hormone-dependent breast cancer. Estrone and DHEA are formed by this sulfatase pathway and can be converted to steroids (estradiol and androstenediol, respectively), which have potent estrogenic properties. STX64 (667 coumate) is a potent tricylic coumarin-based sulfamate that irreversibly inhibits STS activity (IC50 = 8 nM in a placental microsomal assay system). Estrone sulfamate (EMATE) is also a potent STS inhibitor, but has estrogenic activity.

Features and Benefits

This compound is featured on the Nuclear Receptors (Steroids) page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Xiaoye Sang et al.
The Journal of steroid biochemistry and molecular biology, 183, 80-93 (2018-05-29)
Steroid sulfatase is detectable in most hormone-dependent breast cancers. STX64, an STS inhibitor, induced tumor reduction in animal assay. Despite success in phase І clinical trial, the results of phase II trial were not that significant. Breast Cancer epithelial cells
Yue Wu et al.
Molecular and cellular endocrinology, 486, 79-88 (2019-02-27)
Adrenal androgens dehydroepiandrosterone (DHEA) and DHEA-sulfate (DHEAS) are potential substrates for intracrine production of testosterone (T) and dihydrotestosterone (DHT), or directly to DHT, by prostate cancer (PCa) cells. Production of DHT from DHEAS and DHEA, and the role of steroid
Mengxi Jiang et al.
Journal of hepatology, 64(1), 44-52 (2015-07-30)
Chronic inflammatory liver diseases are associated with estrogen excess and feminization in men, which is thought to be due to compromised liver function to break down estrogens. The goal of this study is to determine whether the inflammatory induction of
Wenmei Wu et al.
International journal of molecular sciences, 21(18) (2020-09-24)
Tip60, a key histone acetyltransferase of the MYST family and member of the nuclear multimeric protein complex (NuA4), regulates the activity and stability of proteins involved in the cell cycle, DNA damage responses, autophagy, etc. However, the function and regulatory
Ning Zhou et al.
Journal of ethnopharmacology, 154(3), 687-695 (2014-05-09)
Shu-Gan-Liang-Xue Decoction (SGLXD), a traditional Chinese herbal formula used to ameliorate the hot flushes in breast cancer patients, was reported to have anti-tumor effect on breast cancer. Estrogen plays a critical role in the genesis and evolution of breast cancer.
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