ISDA

Entry Detail

PDB ID:

5UY8

Keywords:

TRANSFERASE, HYDROLASE

Title:

Crystal structure of AICARFT bound to an antifolate

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2017-02-23

Release Date:

2018-01-10

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.39 Å

R-Value Free:

0.24

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Bifunctional purine biosynthesis protein PURH
Chain IDs:A, B, C, D
Chain Length:601
Number of Molecules:4
Biological Source:Homo sapiens

UniProt ID:P31939 Pfam ID:PF02142, PF01808 EC:2.1.2.3

Ligand Molecules

8UM

AMZ

Primary Citation

Discovery of N-(6-Fluoro-1-oxo-1,2-dihydroisoquinolin-7-yl)-5-[(3R)-3-hydroxypyrrolidin-1-yl]thiophene-2-sulfonamide (LSN 3213128), a Potent and Selective Nonclassical Antifolate Aminoimidazole-4-carboxamide Ribonucleotide Formyltransferase (AICARFT) Inhibitor Effective at Tumor Suppression in a Cancer Xenograft Model.

Fales, K.R, Njoroge, F.G, Brooks, H.B, Thibodeaux, S, Torrado, A, Si, C, Toth, J.L, Mc Cowan, J.R, Roth, K.D, Thrasher, K.J, Frimpong, K, Lee, M.R, Dally, R.D, Shepherd, T.A, Durham, T.B, Margolis, B.J, Wu, Z, Wang, Y, Atwell, S, Wang, J, Hui, Y.H, Meier, T.I, Konicek, S.A, Geeganage, S.Show

J. Med. Chem. 60 9599 9616 (2017)

PMID: 29072452 DOI: 10.1021/acs.jmedchem.7b01046

Abstact

A hallmark of cancer is unbridled proliferation that can result in increased demand for de novo synthesis of purine and pyrimidine bases required for DNA and RNA biosynthesis. These synthetic pathways are frequently upregulated in cancer and involve various folate-dependent enzymes. Antifolates have a proven record as clinically used oncolytic agents. Our recent research efforts have produced LSN 3213128 (compound 28a), a novel, selective, nonclassical, orally bioavailable antifolate with potent and specific inhibitory activity for aminoimidazole-4-carboxamide ribonucleotide formyltransferase (AICARFT), an enzyme in the purine biosynthetic pathway. Inhibition of AICARFT with compound 28a results in dramatic elevation of 5-aminoimidazole 4-carboxamide ribonucleotide (ZMP) and growth inhibition in NCI-H460 and MDA-MB-231met2 cancer cell lines. Treatment with this inhibitor in a murine based xenograft model of triple negative breast cancer (TNBC) resulted in tumor growth inhibition.

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Primary Citation of related structures