The function of ENSG00000114956 (DGUOK, deoxyguanosine kinase) is as follows. Phosphorylates deoxyguanosine and deoxyadenosine in the mitochondrial matrix, with the highest efficiency for deoxyguanosine (PubMed:11687801, PubMed:17073823, PubMed:23043144, PubMed:8692979, PubMed:8706825). In non-replicating cells, where cytosolic dNTP synthesis is down-regulated, mtDNA synthesis depends solely on DGUOK and TK2. Phosphorylates certain nucleoside analogs (By similarity). Widely used as target of antiviral and chemotherapeutic agents. {ECO:0000250|UniProtKB:Q9QX60, ECO:0000269|PubMed:11687801, ECO:0000269|PubMed:17073823, ECO:0000269|PubMed:23043144, ECO:0000269|PubMed:8692979, ECO:0000269|PubMed:8706825}.