Acts as component of the CCR4-NOT core complex, which in the nucleus seems to be a general transcription factor, and in the cytoplasm the major mRNA deadenylase involved in mRNA turnover. The NOT protein subcomplex negatively regulates the basal and activated transcription of many genes. Preferentially affects TC-type TATA element-dependent transcription. Could directly or indirectly inhibit component(s) of the general transcription machinery (By similarity). Required for yeast cell adherence to silicone substrate, but nor required not required for buccal epithelial cell adherence or virulence in mouse systemic infection. Component of the NOT protein complex. Decreases cell adherence to silicone substrate. Decreases slightly filamentation. Belongs to the CNOT2/3/5 family.