MRNA CAPPING ENZYME (HCE) (HCAP1) [INCLUDES: POLYNUCLEOTIDE 5- TRIPHOSPHATASE (EC 3.1.3.33) (MRNA 5-TRIPHOSPHATASE) (TPASE); MRNA GUANYLYLTRANSFERASE (EC 2.7.7.50) (GTP--RNA GUANYLYLTRANSFERASE) (GTASE)]. [Source:SWISSPROT;Acc:O60942]