14-3-3 Theta, a member of 14-3-3 family, is an adapter protein that plays an important role in a wide range of vital regulatory processes, including signal transduction, apoptosis, cell cycle progression and DNA replication. Humans have seven 14-3-3 isoforms (beta, gamma, epsilon, eta, sigma, theta and zeta) that serve as scaffolds to promote interactions of regulatory phospho-proteins involved in many vital cellular processes. 14-3-3 Theta binds to a large number of partners, usually by recognition of a phosphoserine or phosphothreonine motif, resulting in the modulation of the activity of the binding partner except PDPK1, whose kinase activity is negatively regulated. Previous studies have shown that disturbances in native 14-3-3 levels can contribute significantly to the development of various cancers. In lung cancer biopsies, 14-3-3 Theta is found to be present in abundance.