Catalytic activity:NAD(+) + (ADP-D-ribosyl)(n)-acceptor = nicotinamide + (ADP-D-ribosyl)(n+1)-acceptor.,Function:May play a role in cell proliferation. May be required for the maintenance of cell cycle progression.,PTM:Stimulated through its phosphorylation by CDK2. Acquires CDK-dependent phosphorylation through late-G1 to S phase, and from prometaphase to cytokinesis in the nucleolar organizing regions. Phosphorylation is suppressed in growth-arrested cells.,similarity:Contains 1 PARP catalytic domain.,subcellular location:Shuttles between the nuclear and cytoplasmic compartment. A subpopulation concentrates in the nucleolus during late G1/S phase.,subunit:Interacts with MYC.,tissue specificity:Highly expressed in spleen and thymus. Intermediate levels in liver, kidney, pancreas, prostate, testis, ovary, intestine, and leukocytes. Low expression in heart, brain, placenta, lung, skeletal muscle, and colon.,
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