Transcriptional regulation by calcium, calcineurin, and NFAT

The NFAT family of transcription factors encompasses five proteins evolutionarily related to the Rel/NF B family (Chytil and Verdine 1996; Graef et al. 2001b). The primordial family member is NFAT5, the only NFATrelated protein represented in the Drosophila genome. NFAT5 is identical to TonEBP (tonicity element binding protein), a transcription factor crucial for cellular responses to hypertonic stress (Lopez-Rodriguez et al. 1999; Miyakawa et al. 1999). We focus here on the remaining four NFAT proteins (NFAT1–NFAT4, also known as NFATc1–c4; see Table 1), referring to them collectively as NFAT. The distinguishing feature of NFAT is its regulation by Ca and the Ca/calmodulin-dependent serine phosphatase…

• WM
  W. M. Keck Foundation
• NI
  National Institutes of Health