Class I PI3K Biology

Tihitina Y. Aytenfisu, Hannah M. Campbell, Mayukh Chakrabarti, L. Mario Amzel, Sandra B. Gabelli

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

This chapter is an introduction to phosphoinositide 3-kinases (PI3K), with class I PI3Ks as the central focus. First, the various PI3K isoforms in class I are presented with emphasis on their overall structure, subunits, subunit constitutive domains, domain-domain interactions, and functional relevance. This structural analysis is followed by a comprehensive history of seminal investigations into PI3K activity. Next, we highlight the divergent roles of the isoforms: PI3Kα, PI3Kβ, PI3Kδ, and PI3Kγ. This section details signaling pathways in which these PI3K isoforms are involved, including the key upstream regulators of PI3K activity and some downstream cellular effects. Nodes of the PI3K pathway are also presented. Inhibitors of some isoforms are discussed to give an overview of the basis of some immunotherapies that are being used to target cell signaling. Finally, the chapter ends with a discussion of the dysregulation of PI3Ks in diseases including APDS, asthma, arthritis, and oncogenic mutations.

Original languageEnglish (US)
Title of host publicationCurrent Topics in Microbiology and Immunology
PublisherSpringer Science and Business Media Deutschland GmbH
Pages3-49
Number of pages47
DOIs
StatePublished - 2022

Publication series

NameCurrent Topics in Microbiology and Immunology
Volume436
ISSN (Print)0070-217X
ISSN (Electronic)2196-9965

Keywords

  • APDS
  • Arthritis
  • Asthma
  • B-cell signaling
  • Chronic inflammation
  • Class I PI3Ks
  • Oncogenic mutation
  • PI3K
  • Phosphoinositide-3-kinase
  • RTK signaling
  • Ras signaling
  • T-cell signaling
  • p101
  • p110β
  • p110γ
  • p110δ
  • p84
  • pl10α

ASJC Scopus subject areas

  • Immunology and Allergy
  • Microbiology
  • Immunology
  • Microbiology (medical)

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