Skip to Content
Merck
All Photos(1)

Key Documents

View All Documentation

SML2989

Sigma-Aldrich

OSMI-2

≥98% (HPLC)

Synonym(s):

(R)-Methyl 2-(2-(2-methoxyphenyl)-2-(2-oxo-1,2-dihydroquinoline-6-sulfonamido)-N-(thiophen-2-ylmethyl)acetamido)acetate, OSMI 2, OSMI2

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Empirical Formula (Hill Notation):
C26H25N3O7S2
CAS Number:
2260542-60-5
Molecular Weight:
555.62
UNSPSC Code:
12352200
NACRES:
NA.77

Quality Level

100

Assay

≥98% (HPLC)

form

powder

optical activity

[α]/D -175.0 to -135.0°, c = 1.0 in chloroform-d

color

white to beige

solubility

DMSO: 2 mg/mL, clear

storage temp.

−20°C

SMILES string

O=C(N1)C=CC2=C1C=CC(S(N[C@@H](C(N(CC3=CC=CS3)CC(OC)=O)=O)C4=C(C=CC=C4)OC)(=O)=O)=C2

Biochem/physiol Actions

OSMI-2 is a cell-permeable precursor of an active site-targeting (Kd = 140 nM) O-GlcNAc transferase (OGT) inhibitor. Upon cell entry, OSMI-2 is activated by cellular esterase to the active inhibitor that effectively downregulates cellular protein O-GlcNAc level (20-40 μM for 4 h/HCT116, 50 μM for 24 h/HEK293T) and renders LNCaP prostate cancer cells dependent on CDK9 for growth (confluency post 96-hr treatment = 73% with 40 μM OSMI-2, 56% with 0.5 μM AT7519, 19% with co-treatment; control cells at 20% and 81% at 0 and 96 hr, respectively).

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Sara E S Martin et al.
Journal of the American Chemical Society, 140(42), 13542-13545 (2018-10-05)
Reversible glycosylation of nuclear and cytoplasmic proteins is an important regulatory mechanism across metazoans. One enzyme, O-linked N-acetylglucosamine transferase (OGT), is responsible for all nucleocytoplasmic glycosylation and there is a well-known need for potent, cell-permeable inhibitors to interrogate OGT function.
Zhi-Wei Tan et al.
Nucleic acids research, 48(10), 5656-5669 (2020-04-25)
Intron detention in precursor RNAs serves to regulate expression of a substantial fraction of genes in eukaryotic genomes. How detained intron (DI) splicing is controlled is poorly understood. Here, we show that a ubiquitous post-translational modification called O-GlcNAc, which is
Harri M Itkonen et al.
Molecular cancer research : MCR, 18(10), 1512-1521 (2020-07-03)
O-GlcNAc transferase (OGT) is a nutrient-sensitive glycosyltransferase that is overexpressed in prostate cancer, the most common cancer in males. We recently developed a specific and potent inhibitor targeting this enzyme, and here, we report a synthetic lethality screen using this
Harri M Itkonen et al.
Theranostics, 9(8), 2183-2197 (2019-06-01)
O-GlcNAc transferase (OGT) is overexpressed in aggressive prostate cancer. OGT modifies intra-cellular proteins via single sugar conjugation (O-GlcNAcylation) to alter their activity. We recently discovered the first fast-acting OGT inhibitor OSMI-2. Here, we probe the stability and function of the

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service