Tequintavirus
Tequintavirus is a genus of viruses in the family Demerecviridae. Bacteria serve as the natural host, with transmission achieved through passive diffusion. The genus contains 70 species.
Structure
Tequintaviruses are nonenveloped, with a head and tail. The head is icosahedral and is about 90 nm in diameter. The tail is about 180 nm long, 9 nm wide. It has three long, kinked terminal fibers around 120 nm in length, and a single straight central fiber attached to a conical tip.
| Genus | Structure | Symmetry | Capsid | Genomic arrangement | Genomic segmentation |
| Tequintavirus | Head-Tail | T=13 | Non-enveloped | Linear | Monopartite |
Genome
Genomes are linear, around 121kb in length. Bacteriophage T5 and several other species have been fully sequenced. The genomes range between roughly 108-121 thousand nucleotides, with about 140 to 170 predicted open reading frames. The complete genomes, as well as two other similar, unclassified genomes are available .
Life cycle
The virus attaches to the host cell's adhesion receptors using its terminal fibers, and degrades the cell wall using viral exolysin sufficiently eject the viral DNA into the host cytoplasm via . Replication follows the DNA strand displacement, via replicative transposition model. DNA-templated transcription is the method of transcription. Once the viral genes have been replicated, the procapsid is assembled and packed. The tail is then assembled and the mature virions are released via lysis. Bacteria serve as the natural host. Transmission routes are passive diffusion.
| Genus | Host details | Tissue tropism | Entry details | Release details | Replication site | Assembly site | Transmission |
| Tequintavirus | Bacteria | - | Injection | Lysis | Cytoplasm | Cytoplasm | Passive diffusion |
Taxonomy
The genus contains the following species:Tequintavirus ABTNLsp4Tequintavirus ABTNLsp9Tequintavirus AKFV33Tequintavirus APCEc03Tequintavirus BB1Tequintavirus BF23Tequintavirus chee24Tequintavirus DaisyDussoixTequintavirus DT5712Tequintavirus DT57CTequintavirus E22Tequintavirus EC100Tequintavirus EC148Tequintavirus ECOP18Tequintavirus ESCO30Tequintavirus ESCO40Tequintavirus ev219Tequintavirus FFH1Tequintavirus fp01Tequintavirus gostya9Tequintavirus GSP044Tequintavirus H8Tequintavirus HASG4Tequintavirus HdH2Tequintavirus hildybeyelerTequintavirus IME178Tequintavirus irisvonrotenTequintavirus JLBYU40Tequintavirus JLBYU43Tequintavirus KPP2018Tequintavirus L6jmTequintavirus lindwurmTequintavirus LLSTequintavirus LmqsSP1Tequintavirus mar004NP2Tequintavirus N5Tequintavirus NBEco001Tequintavirus NBEco002Tequintavirus NBSal003Tequintavirus NBSal005Tequintavirus NR01Tequintavirus oldekolleTequintavirus OSYSPTequintavirus P1100107Tequintavirus phA11Tequintavirus phB7Tequintavirus phC17Tequintavirus PNJ1902Tequintavirus S124Tequintavirus S131Tequintavirus SA001Tequintavirus SE11Tequintavirus selmarattiTequintavirus shivaniTequintavirus SHSML45Tequintavirus slur09Tequintavirus SP01Tequintavirus SP3Tequintavirus SP15Tequintavirus SPC35Tequintavirus SSP1Tequintavirus T5Tequintavirus Th1Tequintavirus tv179112Tequintavirus tv3sent1Tequintavirus tv8sent1748Tequintavirus tvI1Tequintavirus VEc33Tequintavirus VSe12
History
According to ICTV's, the genus T5likevirus was first accepted under the name T5-like phages, assigned only to family Siphoviridae. The whole family was moved to order Caudovirales in 1998, and the genus was renamed to T5-like viruses in ICTV's in 1999. In 2013, it was renamed to T5likevirus, and in 2016 it was renamed again to T5virus. In 2020, The genus was renamed to Tequintavirus and placed in the newly established family Demerecviridae and subfamily Markadamsvirinae.