WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 555116

CAS#: 1889279-16-6

Description: A-485 is a potent and selective HAT inhibitor of p300/CBP in vitro with an IC50 of 10 nM in a p300 TR-FRET assay and 3 nM in a CBP TR-FRET assay with selectivity > 1000-fold over closely related HATs. SPR data indicates potent binding to p300 (KD=15 nM). In PC-3 cells A-485 reduces H3K27ac with IC50 of 73 nM while not affecting H3K9ac levels. Inhibition of cellular proliferation is observed in several cancer cell types, most notably AR+ prostate, multiple myeloma, and NHL. A-486 is a suitable control with 1000-fold higher IC50 in the p300 TR-FRET assay.

Chemical Structure

CAS# 1889279-16-6

Theoretical Analysis

MedKoo Cat#: 555116
Name: A-485
CAS#: 1889279-16-6
Chemical Formula: C25H24F4N4O5
Exact Mass: 536.1683
Molecular Weight: 536.4836
Elemental Analysis: C, 55.97; H, 4.51; F, 14.17; N, 10.44; O, 14.91

Price and Availability

Size Price Availability Quantity
10.0mg USD 350.0 2 Weeks
25.0mg USD 750.0 2 Weeks
50.0mg USD 1350.0 2 Weeks
100.0mg USD 2150.0 2 Weeks
200.0mg USD 2950.0 2 Weeks
500.0mg USD 4950.0 2 Weeks
1.0g USD 6950.0 2 Weeks
2.0g USD 9950.0 2 Weeks
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Synonym: A-485; A 485; A485.

IUPAC/Chemical Name: N-(4-fluorobenzyl)-2-((R)-5-(3-methylureido)-2',4'-dioxo-2,3-dihydrospiro[indene-1,5'-oxazolidin]-3'-yl)-N-((S)-1,1,1-trifluoropropan-2-yl)acetamide


InChi Code: InChI=1S/C25H24F4N4O5/c1-14(25(27,28)29)32(12-15-3-5-17(26)6-4-15)20(34)13-33-21(35)24(38-23(33)37)10-9-16-11-18(7-8-19(16)24)31-22(36)30-2/h3-8,11,14H,9-10,12-13H2,1-2H3,(H2,30,31,36)/t14-,24+/m0/s1

SMILES Code: O=C(N1CC(N([C@H](C(F)(F)F)C)CC2=CC=C(F)C=C2)=O)[C@@]3(OC1=O)CCC4=CC(NC(NC)=O)=CC=C43

Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 536.4836 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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1. http://www.thesgc.org/chemical-probes/A-485

2: Lasko LM, Jakob CG, Edalji RP, Qiu W, Montgomery D, Digiammarino EL, Hansen TM, Risi RM, Frey R, Manaves V, Shaw B, Algire M, Hessler P, Lam LT, Uziel T, Faivre E, Ferguson D, Buchanan FG, Martin RL, Torrent M, Chiang GG, Karukurichi K, Langston JW, Weinert BT, Choudhary C, de Vries P, Van Drie JH, McElligott D, Kesicki E, Marmorstein R, Sun C, Cole PA, Rosenberg SH, Michaelides MR, Lai A, Bromberg KD. Discovery of a selective catalytic p300/CBP inhibitor that targets lineage-specific tumours. Nature. 2017 Oct 5;550(7674):128-132. doi: 10.1038/nature24028. Epub 2017 Sep 27. PubMed PMID: 28953875.


10.0mg / USD 350.0

Additional Information

A-485 inhibited the androgen receptor transcriptional program in both androgen-sensitive and castration-resistant prostate cancer and inhibited tumour growth in a castration-resistant xenograft model. These results demonstrate the feasibility of using small molecule inhibitors to selectively target the catalytic activity of histone acetyltransferases, which may provide effective treatments for transcriptional activator-driven malignancies and diseases.