The timeless (tim) gene is essential for circadian function in Drosophila. Putative homologues of Drosophila tim have been identified in both mice and humans (mTim and hTIM, respectively). Mammalian TIM is not the true orthologue of Drosophila TIM, but is the likely orthologue of a fly gene, timeout (also called tim-2) [1]. mTim has been shown to be essential for embryonic development, but does not have substantiated circadian function[2]. This entry corresponds to the PAB (PARP-1-binding domain) [3].

1: Keeping time with the human genome. Clayton JD, Kyriacou CP, Reppert SM; Nature 2001;409:829-831. PMID:11237000

2: A time-less function for mouse timeless. Gotter AL, Manganaro T, Weaver DR, Kolakowski LF Jr, Possidente B, Sriram S, MacLaughlin DT, Reppert SM; Nat Neurosci 2000;3:755-756. PMID:10903565

3: Timeless Interacts with PARP-1 to Promote Homologous Recombination Repair. Xie S, Mortusewicz O, Ma HT, Herr P, Poon RY, Helleday T, Qian C; Mol Cell. 2015;60:163-176. PMID:26344098