PXD032014

PXD032014 is an original dataset announced via ProteomeXchange.

Title	ATP-site inhibitors induce unique conformations of the Src-family kinase, Fgr
Description	Src family kinases are often overexpressed and constitutively active in cancer cells, where they represent promising targets for therapeutic intervention. In myeloid hematopoietic cells, Hck, Lyn, and Fgr are associated with both chronic and acute forms of myeloid leukemia. All three of these kinases are expressed in acute myeloid leukemia (AML), where high-level expression correlates with poor survival. The pyrrolopyrimidine Src-family kinase inhibitor A-419259 (also known as RK-20449) has been shown to significantly inhibit patient-derived AML bone marrow cell growth in immunocompromised mice. Recent work has identified an N-phenylbenzamide kinase inhibitor, known as TL02-59, which potently inhibited Fgr kinase activity in vitro and reversed orthotopic engraftment of AML cells in the bone marrow and spleen of immunocompromised mice following oral administration. The inhibitory mechanism of this compound with Fgr or other Src-family members has not been reported. Both wild-type Fgr and a tail mutant (i.e., replacement of Tyr527 with Phe) were shown to produce equal numbers of transformed colonies when expressed in rodent fibroblasts, whereas wild-type Hck transforming activity was completely repressed. In both Hck and Fgr, however, the tail tyrosine residue was shown to be phosphorylated, and hydrogen deuterium exchange mass spectrometry (HDX MS) of near-full-length Fgr was consistent with the closed conformation in solution, with the SH3 domain bound to the SH2-kinase linker and the tail bound to SH2. Here we present the first X-ray crystal structures of near-full-length Fgr bound to the ATP site inhibitors A-419259 and TL02-59. Structural changes induced by the inhibitors in the crystalline state were validated in solution using HDX MS, with A-419259 stabilizing the closed conformation and TL02-59 enhancing exposure of the SH3 domain to solvent. These new structures help to explain the constitutive activity of wild-type Fgr in cells as well as its unique sensitivity to TL02-59, which is currently in development for AML and other maladies.
HostingRepository	PRIDE
AnnounceDate	2022-09-22
AnnouncementXML	Submission_2022-09-22_05:51:08.130.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	John R. Engen
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	phosphorylated residue
Instrument	Synapt MS

Revision	Datetime	Status	ChangeLog Entry
0	2022-03-02 09:52:52	ID requested
⏵ 1	2022-09-22 05:51:08	announced

Du S, Alvarado JJ, Wales TE, Moroco JA, Engen JR, Smithgall TE, ATP-site inhibitors induce unique conformations of the acute myeloid leukemia-associated Src-family kinase, Fgr. Structure, 30(11):1508-1517.e3(2022) [pubmed]

submitter keyword: Src-family kinase

acute myeloid leukemia

HDX MS

hydrogen/deuterium exchange mass spectrometry;

John R. Engen
contact affiliation	Department of Chemistry & Chemical Biology, Northeastern University
contact email	j.engen@northeastern.edu
lab head
John R. Engen
contact affiliation	Northeastern University
contact email	j.engen@northeastern.edu
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD032014
     1. Label: PRIDE project
     2. Name: ATP-site inhibitors induce unique conformations of the Src-family kinase, Fgr