Genus: Hypovirus


Genus: Hypovirus

Virion

Since only one genus is currently recognized, the genus description corresponds to the family description. 

Genome organization and replication

See discussion under family description.

Antigenicity

See discussion under family description.

Biology

See discussion under family description.

Species demarcation criteria

Viruses belonging to different species are differentiated by genetic organization or genome expression, as well as by major differences in nucleic acid sequence identity. Thus, Cryphonectria hypovirus 1 (CHV1) differs from Cryphonectria hypovirus 2 (CHV2) in the presence or absence, respectively, of a papain-like proteinase in ORF A. CHV1 and CHV2 isolates share less than 60% overall aa sequence identity with each other. Cryphonectria hypovirus 3 (CHV3) and Cryphonectria hypovirus 4 (CHV4) each contain a single ORF, but isolates of the two species share less than 50% overall sequence identity. In addition, infection by CHV1 isolates results in a white or near-white phenotype in the fungus; CHV2 infection results in an orange-brown phenotype; CHV3 and CHV4 isolates have little effect on fungal pigment. Infection by members of any of the four species may reduce fungal virulence.

Member Species

SpeciesVirus name(s)Exemplar isolateExemplar accession numberExemplar RefSeq numberAvailable sequenceOther isolatesOther isolate accession numbersVirus Abbreviation(s)Isolate Abbreviation
Cryphonectria hypovirus 1Cryphonectria hypovirus 1EP713M57938NC_001492Complete genomeCHV1
Cryphonectria hypovirus 2Cryphonectria hypovirus 2NB58L29010NC_003534Complete genomeCHV2
Cryphonectria hypovirus 3Cryphonectria hypovirus 3GH2AF188515NC_000960Complete genomeCHV3
Cryphonectria hypovirus 4Cryphonectria hypovirus 4SR2AY307099NC_006431Complete genomeCHV4

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.
Download GenBank/EMBL query for sequences listed in the table here.

Related, Unclassified Viruses

Virus name

Accession number

Virus abbreviation

Sclerotinia sclerotiorum hypovirus 1-SZ-150

JF781304

ScHV1-SZ150

Sclerotinia sclerotiorum hypovirus 2-5472

KF525367

SsHV2-5472

Sclerotinia sclerotiorum hypovirus 2-SX247

KJ561218

SsHV2-SX247

Sclerotinia sclerotiorum hypovirus 2-Lactuca

KF898354

SsHV2- L

Valsa ceratosperma hypovirus 1-MVC86

AB690372

VcHV1-MVC86

Phomopsis longicolla hypovirus 1-ME711

KF537784

PlHV1-ME711

Fusarium graminearum hypovirus 1-HN10

KC330231

FgHV1-HN10

Fusarium graminearum hypovirus 2-JS16

KP208178

FgHV2-JS16

Fusarium poae hypovirus 1- MAFF 240374

LC150612

FpHV1-MAFF240374

Fusarium langsethiae hypovirus 1-AH32

KY120321

FlHV1-AH32

Macrophomina phaseolina hypovirus 1- Mp2003b

KP900893

MpHV1- Mp2003b

Agaricus bisporus virus 2-C19-C23-C1

KY357506

AbV2-C19-C23-C1

Wuhan insect virus 14-WHZM10168

KX883007

WIV14-WHZM10168

Beihai hypo-like virus 1-BHZC36965

KX883006

BHLV1-BHZC36965

Beihai sipunculid worm virus 6-BHNXC41400

KX883005

BSWV6- BHNXC41400

Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations.
Download GenBank/EMBL query for sequences listed in the table here.