Abstract：
:Small molecule kinase inhibitors that stabilize distinct ATP binding site conformations can differentially modulate the global conformation of Src-family kinases (SFKs). However, it is unclear which specific ATP binding site contacts are responsible for modulating the global conformation of SFKs and whether these inhibitor-mediated allosteric effects generalize to other tyrosine kinases. Here, we describe the development of chemical probes that allow us to deconvolute which features in the ATP binding site are responsible for the allosteric modulation of the global conformation of Src. We find that the ability of an inhibitor to modulate the global conformation of Src's regulatory domain-catalytic domain module relies mainly on the influence it has on the conformation of a structural element called helix αC. Furthermore, by developing a set of orthogonal probes that target a drug-sensitized Src variant, we show that stabilizing Src's helix αC in an active conformation is sufficient to promote a Src-mediated, phosphotransferase-independent alteration in cell morphology. Finally, we report that ATP-competitive, conformation-selective inhibitors can influence the global conformation of tyrosine kinases beyond the SFKs, suggesting that the allosteric networks we observe in Src are conserved in kinases that have a similar regulatory architecture. Our study highlights that an ATP-competitive inhibitor's interactions with helix αC can have a major influence on the global conformation of some tyrosine kinases.
journal_name
ACS Chem Bioljournal_title
ACS chemical biologyauthors
Fang L,Vilas-Boas J,Chakraborty S,Potter ZE,Register AC,Seeliger MA,Maly DJdoi
10.1021/acschembio.0c00429subject
Has Abstractpub_date
2020-07-17 00:00:00pages
2005-2016issue
7eissn
1554-8929issn
1554-8937journal_volume
15pub_type
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