6JQR

Crystal structure of FLT3 in complex with gilteritinib

Summary for 6JQR

• Entry DOI: 10.2210/pdb6jqr/pdb
• Descriptor: Receptor-type tyrosine-protein kinase FLT3,Receptor-type tyrosine-protein kinase FLT3, 6-ethyl-3-[[3-methoxy-4-[4-(4-methylpiperazin-1-yl)piperidin-1-yl]phenyl]amino]-5-(oxan-4-ylamino)pyrazine-2-carboxamide, SULFATE ION, ... (6 entities in total)
• Functional Keywords: protein kinase, oncoprotein, transferase
• Biological source: Homo sapiens (Human); More
• Total number of polymer chains: 1
• Total formula weight: 39337.74

Authors

Amano, Y. (deposition date: 2019-04-01, release date: 2019-11-20, Last modification date: 2024-03-27)

Primary citation

Kawase, T.,Nakazawa, T.,Eguchi, T.,Tsuzuki, H.,Ueno, Y.,Amano, Y.,Suzuki, T.,Mori, M.,Yoshida, T.
Effect of Fms-like tyrosine kinase 3 (FLT3) ligand (FL) on antitumor activity of gilteritinib, a FLT3 inhibitor, in mice xenografted with FL-overexpressing cells.
Oncotarget, 10:6111-6123, 2019

PubMed Abstract: Therapeutic effects of FLT3 inhibitors have been reported in acute myeloid leukemia (AML) with constitutively activating mutations, including internal tandem duplication (ITD) and point mutation, which are found in approximately one-third of AML patients. One of the critical issues of treatment with FLT3 inhibitors in -mutated AML is drug resistance. FLT3 ligand (FL) represents a mechanism of resistance to FLT3 inhibitors, including quizartinib, midostaurin, and sorafenib, in AML cells harboring both wild-type and mutant ( / ). Here, we investigated the effect of FL on the efficacy of gilteritinib, a FLT3 inhibitor, in AML-derived cells and in mice. In contrast to other FLT3 inhibitors, FL stimulation had little effect on growth inhibition or apoptosis induction by gilteritinib. The antitumor activity of gilteritinib was also comparable between xenograft mouse models injected with FL-expressing and mock MOLM-13 cells. In the FLT3 signaling analyses, gilteritinib inhibited FLT3 and FLT3-ITD to a similar degree in HEK293 and Ba/F3 cells, and similarly suppressed FLT3 downstream signaling molecules (including ERK1/2 and STAT5) in both the presence and absence of FL in MOLM-13 cells. Co-crystal structure analysis showed that gilteritinib bound to the ATP-binding pocket of FLT3. These results suggest that gilteritinib has therapeutic potential in FLT3-mutated AML patients with FL overexpression.

PubMed: 31692922
DOI: 10.18632/oncotarget.27222

Experimental method

X-RAY DIFFRACTION (2.2 Å)