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Details on Person UniProt:Q2HR95 ORF37

Class:IdReferenceGeneProduct:9973246
_chainChangeLogchain:1-486 for 9973246 added on Fri Feb 20 2026
_displayNameUniProt:Q2HR95 ORF37
_timestamp2026-02-20 21:46:49
chainchain:1-486
checksumD7E0FA2FCB04AACF
commentFUNCTION Plays a role in processing non linear or branched viral DNA intermediates in order to promote the production of mature packaged unit-length linear progeny viral DNA molecules. Exhibits endonuclease and exonuclease activities and accepts both double-stranded and single-stranded DNA as substrate. Exonuclease digestion of DNA is in the 5'-> 3' direction and the products are 5'-monophosphate nucleosides. Additionally, forms a recombinase with the major DNA-binding protein, which displays strand exchange activity. Also acts as a cytoplasmic RNA endonuclease that induces degradation of the majority of the cellular messenger RNAs during early lytic infection. The resulting inhibition of cellular protein synthesis serves to ensure maximal viral gene expression and evasion from host immune response. Internally cleaves host mRNAs which are then degraded by the cellular exonuclease XRN1. Bypasses therefore the regulatory steps of deadenylation and decapping normally required for XRN1 activation. In addition, inhibits host inflammasome activation to promote viral lytic replication by interacting with host AIM2 and disrupting its polymerization (PubMed:37364111).SUBUNIT Forms a complex with the DNA polymerase, the DNA polymerase processivity factor, and the major DNA binding protein.SUBCELLULAR LOCATION Belongs to the herpesviridae alkaline nuclease family.
created[InstanceEdit:9973335] Orlic-Milacic, Marija, 2025-11-14
descriptionrecommendedName: fullName evidence="1"Shutoff alkaline exonuclease shortName evidence="1"SOX ecNumber evidence="1"3.1.-.-
geneNameORF37
identifierQ2HR95
isSequenceChangedFALSE
keywordDecay of host mRNAs by virus
Early protein
Endonuclease
Eukaryotic host gene expression shutoff by virus
Exonuclease
Host cytoplasm
Host gene expression shutoff by virus
Host mRNA suppression by virus
Host nucleus
Host-virus interaction
Hydrolase
Nuclease
Reference proteome
RNA-binding
modified[InstanceEdit:9983091] Weiser, Joel, 2026-02-20
nameORF37
referenceDatabase[ReferenceDatabase:2] UniProt
secondaryIdentifierAN_HHV8P
sequenceLength486
species[Species:2671781] Human herpesvirus 8
(referenceEntity)[EntityWithAccessionedSequence:9973374] ORF37 [cytosol] [Human herpesvirus 8]
[EntityWithAccessionedSequence:9973395] ORF37 [nucleoplasm] [Human herpesvirus 8]
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No pathways have been reviewed or authored by UniProt:Q2HR95 ORF37 (9973246)