Is PARP1 a Hero or Villain?

PARP1 as a Hero vs Villain
Not counting histones, PARP1 [Poly(ADP-ribose) Polymerase 1] is the most abundant nuclear protein in mammalian cells. While principally known for its role in various types of DNA repair, recent work expanded it’s repertoire to include genome stability maintenance, chromatin remodeling, DNA methylation/gene expression, cellular differentiation, and cell survival modulation via NAD+/ATP regulation.1 It performs Poly(ADP-ribosyl)ation
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SARM1 Forefronts Research into Major Neurological Diseases

SARM1 Causes Axonal Death
SARM1 [Sterile alpha & toll/interleukin receptor (TIR) motif-containing protein 1] consists of a N-terminal mitochondrial localization sequence (NLS), an autoinhibitory HEAT/armadillo (ARM) domain, two tandem sterile alpha motif domains (SAMs), and a C-terminal toll/interleukin receptor domain (TIR). It is a human toll like receptor (TLR) adaptor protein. TLR adaptors (MYD88, MAL, TRIF, & TRAM) usually
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