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Details on Person UniProt:Q2HRD0 ORF9

Class:IdReferenceGeneProduct:9973239
_chainChangeLogchain:1-1012 for 9973239 added on Fri Feb 20 2026
_displayNameUniProt:Q2HRD0 ORF9
_timestamp2026-02-20 21:29:18
chainchain:1-1012
checksum85630925BD54CC9C
commentFUNCTION Replicates viral genomic DNA. The replication complex is composed of six viral proteins: the DNA polymerase, processivity factor, primase, primase-associated factor, helicase, and ssDNA-binding protein. Additionally, the polymerase contains an intrinsic ribonuclease H (RNase H) activity that specifically degrades RNA/DNA heteroduplexes or duplex DNA substrates in the 5' to 3' direction. Therefore, it can catalyze the excision of the RNA primers that initiate the synthesis of Okazaki fragments at a replication fork during viral DNA replication (By similarity).CATALYTIC ACTIVITY DNA(n) + a 2'-deoxyribonucleoside 5'-triphosphate = DNA(n+1) + diphosphateCATALYTIC ACTIVITY Endonucleolytic cleavage to 5'-phosphomonoester.SUBUNIT Forms a complex with the ssDNA-binding protein, the DNA polymerase processivity factor, and the alkaline exonuclease. Interacts with the putative helicase-primase complex subunit; this interaction may coordinate leading and lagging strand DNA synthesis at the replication fork (By similarity).SUBCELLULAR LOCATION The protein is present at discrete sites in nuclei, called replication compartments where viral DNA replication occurs.SIMILARITY Belongs to the DNA polymerase type-B family.
created[InstanceEdit:9973335] Orlic-Milacic, Marija, 2025-11-14
descriptionrecommendedName: DNA polymerase catalytic subunit ecNumber: 2.7.7.7 ecNumber: 3.1.26.4
geneNameORF9
identifierQ2HRD0
isSequenceChangedFALSE
keywordDNA replication
DNA-binding
DNA-directed DNA polymerase
Endonuclease
Host nucleus
Hydrolase
Multifunctional enzyme
Nuclease
Nucleotidyltransferase
Reference proteome
Transferase
Viral DNA replication
modified[InstanceEdit:9983091] Weiser, Joel, 2026-02-20
nameORF9
referenceDatabase[ReferenceDatabase:2] UniProt
secondaryIdentifierDPOL_HHV8P
sequenceLength1012
species[Species:2671781] Human herpesvirus 8
(referenceEntity)[EntityWithAccessionedSequence:9973366] ORF9 [nucleoplasm] [Human herpesvirus 8]
[EntityWithAccessionedSequence:9979739] ORF9 [cytosol] [Human herpesvirus 8]
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