Peptidyl arginine deiminase 1 (PAD1) is a member of the peptidyl arginine deiminase family of enzymes. It is a component of the 26S proteasome, a multiprotein complex that degrades proteins targeted for destruction by the ubiquitin pathway. PAD1 is expressed in the epidermis and uterus. The gene encoding this protein is localized on human chromosome 1p36.13.

Peptidyl arginine deiminases catalyze the post-translational deimination of proteins by converting arginine residues into citrullines in the presence of calcium ions. The overexpression of PAD1 induced a distinctive pattern of multidrug resistance in mammalian cells and moderate resistance to ultraviolet light. PAD1 is also responsible for substrate deubiquitination during proteasomal degradation. It deiminates filaggrin in the last stages of keratinocyte differentiation. Thus, PAD1 has a role in epidermis function and homeostasis. The protein has been genetically associated with rheumatoid arthritis.

Supplied in 50mM Tris-HCl, pH 7.5, 150mM NaCl, 10mM glutathione, 0.1mM EDTA, 0.25mM DTT, 0.1mM PMSF, 25% glycerol.

after opening, aliquot into smaller quantities and store at -70 °C. Avoid repeating handling and multiple freeze/thaw cycles

This protein is not assayed for enzymatic activity.