Multifunctional non-homologous end joining protein LigD (NHEJ DNA polymerase) [Includes: 3'-phosphoesterase (3'-ribonuclease/3'-phosphatase); DNA ligase D (LigD) (EC 6.5.1.1) (Polydeoxyribonucleotide synthase [ATP]); DNA repair polymerase (Pol) (Polymerase/primase)]