Ichnovirus
Virus classification Edit this classification
(unranked): Viriform
Family: Polydnaviriformidae
Genus: Ichnoviriform
Synonyms

Ichnoviriform

  • Ichnoviriform ICTV 2021
  • Ichnovirus ICTV 1990
  • Polydnavirus ICTV 1984

Ichnovirus is a genus of viruses, in the family Polydnaviridae. Parasitoid wasps serve as hosts, and these wasps are themselves parasitoids of Lepidoptera. There are 21 species in this genus.[1][2]

Taxonomy

The genus Ichnovirus contained 21 species in ICTV version 1999a-2020:[3]The genus Ichnoviriform contains 22 species starting ICTV version 2021[2] The species Ichnoviriform rostralis, previously known as Tranosema rostrale bracovirus was moved to ichnoviriform from bracoviriform (bracovirus) in 2021.

NamePrevious NameAbbr
Ichnoviriform acronyctae Diadegma acronyctae ichnovirus DaIV
Ichnoviriform annulipedis Hyposoter annulipes ichnovirus HaIV
Ichnoviriform aprilis Campoletis aprilis ichnovirus CaIV
Ichnoviriform arjunae Casinaria arjuna ichnovirus CarIV
Ichnoviriform benefactoris Olesicampe benefactor ichnovirus ObIV
Ichnoviriform eribori Eriborus terebrans ichnovirus EtIV
Ichnoviriform exiguae Hyposoter exiguae ichnovirus HeIV
Ichnoviriform flavicinctae Campoletis flavicincta ichnovirus CfIV
Ichnoviriform forcipatae Casinaria forcipata ichnovirus CfoIV
Ichnoviriform fugitivi Hyposoter fugitivus ichnovirus HfIV
Ichnoviriform fumiferanae Glypta fumiferanae ichnovirus GfIV
Ichnoviriform geniculatae Olesicampe geniculatae ichnovirus OgIV
Ichnoviriform infestae Casinaria infesta ichnovirus CiIV
Ichnoviriform interrupti Diadegma interruptum ichnovirus DiIV
Ichnoviriform lymantriae Hyposoter lymantriae ichnovirus HlIV
Ichnoviriform montani Enytus montanus ichnovirus X-2
Ichnoviriform pilosuli Hyposoter pilosulus ichnovirus HpIV
Ichnoviriform rivalis Hyposoter rivalis ichnovirus HrIV
Ichnoviriform rostralis Tranosema rostrale bracovirus TrBV
Ichnoviriform sonorense Campoletis sonorensis ichnovirus CsIV
Ichnoviriform tenuifemoris Synetaeris tenuifemur ichnovirus StIV
Ichnoviriform terebrantis Diadegma terebrans ichnovirus DtIV

Ichnoviriform fugitivi/Hyposoter fugitivus ichnovirus/HfIV: GenBank accession

  • SegA1: AY556383
  • SegA2-SegA3: AB291165-AB291166
  • SegB1: AY935249
  • SegB2-SegB6: AB291167-AB291171
  • SegB7: AY563518
  • SegB8: AY597814
  • SegB9-SegB10: AB291172-AB291173
  • SegB11: AY570798
  • SegB12-SegB16: AB291174-AB291178
  • SegB17: AY577428
  • SegB18: AB291179
  • SegC1: AB291180
  • SegC2: AY570799
  • SegC3-SegC9: AB291181-AB291187
  • SegC10: AY577429
  • SegC11: AB291188
  • SegC12: AY556384
  • SegC13-SegC20: AB291189-AB291195
  • SegD1-SegD4: AB291196-AB291199
  • SegD5: AY563519
  • SegD6-SegD12: AB291200-AB291206
  • SegE1: AB291207
  • SegE2: AB291208
  • SegG1: AB291209

Ichnoviriform fugitivi/Hyposoter fugitivus ichnovirus/HfIV: REFSEQ accession

  • SegA1: NC_008947
  • SegA2: NC_008957
  • SegA3: NC_008958
  • SegB1: NC_008956
  • SegB2: NC_008959
  • SegB3-SegB5: NC_008960-NC_008962
  • SegB6: NC_008999
  • SegB7: NC_008949
  • SegB8: NC_008955
  • SegB9: NC_008963
  • SegB10: NC_008964
  • SegB11: NC_008951
  • SegB12-SegB13: NC_008965-NC_008966
  • SegB14: NC_009000
  • SegB15: NC_008967
  • SegB16: NC_008968
  • SegB17: NC_008953
  • SegB18: NC_008969
  • SegC1: NC_008970
  • SegC2: NC_008952
  • SegC3-SegC9: NC_008971-NC_008979
  • SegC10: NC_008954
  • SegC11: NC_008980
  • SegC12: NC_008948
  • SegC13: NC_009001
  • SegC14-SegC15: NC_008981-NC_008982
  • SegC16: NC_008946
  • SegC17: NC_008983
  • SegC18: NC_008984
  • SegC19: NC_009002
  • SegC20: NC_008985
  • SegD1-SegD4: NC_008986-NC_008989
  • SegD5: NC_008950
  • SegD6-SegD12: NC_008990-NC_008996
  • SegE1: NC_009003
  • SegE2: NC_008997
  • SegG1: NC_008998

Ichnoviriform fumiferanae/Glypta fumiferanae ichnovirus/GfIV: GenBank accession

  • SegA1-SegA10: AB289903-AB289912
  • SegB1-SegB65: AB289913-AB289977
  • SegC1-SegC22: AB289978-AB289999
  • SegD1-SegD7: AB290000-AB290006
  • SegE1: AB290007

Ichnoviriform fumiferanae/Glypta fumiferanae ichnovirus/GfIV: REFSEQ accession

  • SegA1-SegA10: NC_008837-NC_008846
  • SegB1: NC_008847
  • SegB2: NC_008933
  • SegB3-SegB35: NC_008848-NC_008878
  • SegB36: NC_008936
  • SegB37-SegB47: NC_008879-NC_008889
  • SegB48: NC_008937
  • SegB49-SegB65: NC_008890-NC_008905
  • SegC1: NC_008939
  • SegC2-SegC7: NC_008906-NC_008911
  • SegC8: NC_008940
  • SegC9-SegC22: NC_008912-NC_008925
  • SegD1-SegD3: NC_008926-NC_008928
  • SegD4: NC_008941
  • SegD5-SegD7: NC_008929-NC_008931
  • SegE1: NC_008932

Structure

Viruses in Ichnovirus are enveloped, with prolate ellipsoid and cylindrical geometries. Genomes are circular and segmented, around 6.0-20kb in length.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
IchnovirusProlate ellipsoidEnvelopedCircularSegmented

Life cycle

Viral replication is nuclear. DNA-templated transcription is the method of transcription. The virus exits the host cell by nuclear pore export. Parasitoid wasps in the subfamilies Banchinae and Campopleginae serve as hosts, but these wasps are themselves parasites of lepidoptera. The wasp injects one or more eggs into its host along with a quantity of virus. The virus and wasp are in a symbiotic relationship: expression of viral genes prevents the wasp's host's immune system from killing the wasp's injected egg and causes other physiological alterations that ultimately cause the parasitized host to die. Transmission routes are parental.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
IchnovirusParasitoid wasps (Ichneumonidae)Hemocytes; fat bodiesUnknownLysis; buddingNucleusNucleusUnknown

References

  1. 1 2 3 "Viral Zone". ExPASy. Retrieved 15 June 2015.
  2. 1 2 "Virus Taxonomy: 2022 Release". International Committee on Taxonomy of Viruses (ICTV). March 2023. Retrieved 15 August 2023.
  3. โ†‘ "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2020. Retrieved 15 August 2023.
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