Human coronavirus HKU1

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Human coronavirus HKU1
Coronavirus-HKU1.png
Formation of HcoV-HKU1.
Virus classification OOjs UI icon edit-ltr.svg
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Pisuviricota
Class: Pisoniviricetes
Order: Nidovirales
Family: Coronaviridae
Genus: Betacoronavirus
Subgenus: Embecovirus
Species:
Human coronavirus HKU1

Human coronavirus HKU1 (HCoV-HKU1) is a species of coronavirus in humans and animals. It causes an upper respiratory disease with symptoms of the common cold, but can advance to pneumonia and bronchiolitis. [1] It was first discovered in January 2004 from one man in Hong Kong. [2] Subsequent research revealed it has global distribution and earlier genesis.

Contents

The virus is an enveloped, positive-sense, single-stranded RNA virus which enters its host cell by binding to the N-acetyl-9-O-acetylneuraminic acid receptor. [3] It has the Hemagglutinin esterase (HE) gene, which distinguishes it as a member of the genus Betacoronavirus and subgenus Embecovirus . [4]

History

HCoV-HKU1 was first detected in January 2004, in a 71-year-old man who was hospitalized due to acute respiratory distress syndrome and radiographically confirmed bilateral pneumonia. The man had recently returned to Hong Kong from Shenzhen, China. [2] [5]

Virology

Woo and coworkers were unsuccessful in their attempts to grow a HCoV-HKU1 isolate but were able to obtain the complete genomic sequence. Phylogenetic analysis showed that HKU1 is most closely related to the mouse hepatitis virus (MHV), and is distinct in that regard from other known human betacoronaviruses, such as HCoV-OC43. [2] The virus has been successfully cultured by Pyrc and coworkers in the ex vivo model of human respiratory epithelium. [6] Additional research has revealed that the virus attaches itself to O-acetylated sialic acids on the cell surface, [7] which instigates a conformational shift in the S protein, facilitating interaction with the entry receptor. [8] Intriguingly, the enzyme kallikrein 13 has been identified as an activating factor responsible for the spike protein processing by the Pyrc's team. This could potentially specify the virus's tissue and cellular preference, and might also govern the regulation of interspecies transmission. [9]

When the RNA-dependent RNA polymerase (RdRp), spike (S), and nucleocapsid (N) genes were analyzed, incompatible phylogenetic relationships were discovered. Complete genome sequencing of 22 strains of HCoV-HKU1 confirmed this was due to natural recombination. [2] HCoV-HKU1 likely originated from rodents. [10]

HCoV-HKU1 is one of seven known coronaviruses to infect humans. The other six are: [11]

The structures of HCoV-HKU1 spike (S) and hemagglutinin esterase (HE) proteins have been resolved by Cryo-EM in 2016 and 2020, respectively. The S protein ( PDB: 5I08 ​) has been noted for its large size. [12] The HE protein ( PDB: 6Y3Y ​) differs from conventional ones (such as the one in OC43) by having a much smaller vestigial lectin domain. This domain is shielded from recognition by the immune system via size changes and glycosylation. [13]

Epidemiology

A trace-back analysis of SARS negative nasopharyngeal aspirates from patients with respiratory illness during the SARS period in 2003, identified the presence of CoV-HKU1 RNA in the sample from a 35-year-old woman with pneumonia. [5]

Following the initial reports of the discovery of HCoV-HKU1, the virus was identified that same year in 10 patients in northern Australia. Respiratory samples were collected between May and August (winter in Australia). Investigators found that most of the HCoV-HKU1–positive samples originated from children in the later winter months. [14]

The first known cases in the Western hemisphere were discovered in 2005 after analysing older specimens by clinical virologists at Yale-New Haven Hospital in New Haven, Connecticut who were curious to discover if HCoV-HKU1 was in their area. They conducted a study of specimens collected in a 7-week period (December 2001 – February 2002) in 851 infants and children. Specimens of nine children had human coronavirus HKU1. These children had respiratory tract infections at the time the specimens were collected (in one girl so severe that mechanical ventilation was needed), while testing negative for other causes like Human respiratory syncytial virus (RSV), parainfluenza viruses (types 1–3), influenza A and B viruses, and adenovirus by direct immunofluorescence assay as well as human metapneumovirus and HCoV-NH by reverse transcription polymerase chain reaction (RT-PCR). The researchers reported that the strains identified in New Haven were similar to the strain found in Hong Kong and suggested a worldwide distribution. [15] These strains found in New Haven is not to be confused with HCoV-NH (New Haven coronavirus), which is a strain of Human coronavirus NL63.

In July 2005, six cases were reported in France. In these cases, French investigators utilized improved techniques for recovering the virus from nasopharyngeal aspirates and from stool samples. [16]

See also

Related Research Articles

<span class="mw-page-title-main">Coronavirus</span> Subfamily of viruses in the family Coronaviridae

Coronaviruses are a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, they cause respiratory tract infections that can range from mild to lethal. Mild illnesses in humans include some cases of the common cold, while more lethal varieties can cause SARS, MERS and COVID-19, which is causing the ongoing pandemic. In cows and pigs they cause diarrhea, while in mice they cause hepatitis and encephalomyelitis.

<i>Coronaviridae</i> Family of viruses in the order Nidovirales

Coronaviridae is a family of enveloped, positive-strand RNA viruses which infect amphibians, birds, and mammals. The group includes the subfamilies Letovirinae and Orthocoronavirinae; the members of the latter are known as coronaviruses.

<span class="mw-page-title-main">SARS-CoV-1</span> Virus that causes SARS

Severe acute respiratory syndrome coronavirus 1 (SARS-CoV-1), previously known as severe acute respiratory syndrome coronavirus (SARS-CoV), is a strain of coronavirus that causes severe acute respiratory syndrome (SARS), the respiratory illness responsible for the 2002–2004 SARS outbreak. It is an enveloped, positive-sense, single-stranded RNA virus that infects the epithelial cells within the lungs. The virus enters the host cell by binding to angiotensin-converting enzyme 2. It infects humans, bats, and palm civets. The SARS-CoV-1 outbreak was largely brought under control by simple public health measures. Testing people with symptoms, isolating and quarantining suspected cases, and restricting travel all had an effect. SARS-CoV-1 was most transmissible when patients were sick, so its spread could be effectively suppressed by isolating patients with symptoms.

<i>Human coronavirus NL63</i> Species of virus

Human coronavirus NL63 (HCoV-NL63) is a species of coronavirus, specifically a Setracovirus from among the Alphacoronavirus genus. It was identified in late 2004 in patients in the Netherlands by Lia van der Hoek and Krzysztof Pyrc using a novel virus discovery method VIDISCA. Later on the discovery was confirmed by the researchers from the Rotterdam, the Netherlands The virus is an enveloped, positive-sense, single-stranded RNA virus which enters its host cell by binding to ACE2. Infection with the virus has been confirmed worldwide, and has an association with many common symptoms and diseases. Associated diseases include mild to moderate upper respiratory tract infections, severe lower respiratory tract infection, croup and bronchiolitis.

<i>Murine coronavirus</i> Species of virus

Murine coronavirus (M-CoV) is a virus in the genus Betacoronavirus that infects mice. Belonging to the subgenus Embecovirus, murine coronavirus strains are enterotropic or polytropic. Enterotropic strains include mouse hepatitis virus (MHV) strains D, Y, RI, and DVIM, whereas polytropic strains, such as JHM and A59, primarily cause hepatitis, enteritis, and encephalitis. Murine coronavirus is an important pathogen in the laboratory mouse and the laboratory rat. It is the most studied coronavirus in animals other than humans, and has been used as an animal disease model for many virological and clinical studies.

<span class="mw-page-title-main">Spike protein</span> Glycoprotein spike on a viral capsid or viral envelope

In virology, a spike protein or peplomer protein is a protein that forms a large structure known as a spike or peplomer projecting from the surface of an enveloped virus. The proteins are usually glycoproteins that form dimers or trimers.

<span class="mw-page-title-main">Coronavirus packaging signal</span> Regulartory element in coronaviruses

The Coronavirus packaging signal is a conserved cis-regulatory element found in Betacoronavirus. It has an important role in regulating the packaging of the viral genome into the capsid. As part of the viral life cycle, within the infected cell, the viral genome becomes associated with viral proteins and assembles into new infective progeny viruses. This process is called packaging and is vital for viral replication.

Bovine coronavirus is a coronavirus which is a member of the species Betacoronavirus 1. The infecting virus is an enveloped, positive-sense, single-stranded RNA virus which enters its host cell by binding to the N-acetyl-9-O-acetylneuraminic acid recepter. Infection causes calf enteritis and contributes to the enzootic pneumonia complex in calves. It can also cause winter dysentery in adult cattle. It can infect both domestic and wild ruminants and has a worldwide distribution. Transmission is horizontal, via oro-fecal or respiratory routes. Like other coronaviruses from genus Betacoronavirus, subgenus Embecovirus, it has a surface protein called hemagglutinin esterase (HE) in addition to the four structural proteins shared by all coronaviruses.

<span class="mw-page-title-main">MERS-related coronavirus</span> Species of virus

Middle East respiratory syndrome–related coronavirus (MERS-CoV), or EMC/2012 (HCoV-EMC/2012), is the virus that causes Middle East respiratory syndrome (MERS). It is a species of coronavirus which infects humans, bats, and camels. The infecting virus is an enveloped, positive-sense, single-stranded RNA virus which enters its host cell by binding to the DPP4 receptor. The species is a member of the genus Betacoronavirus and subgenus Merbecovirus.

<i>Betacoronavirus</i> Genus of viruses

Betacoronavirus is one of four genera of coronaviruses. Member viruses are enveloped, positive-strand RNA viruses that infect mammals. The natural reservoir for betacoronaviruses are bats and rodents. Rodents are the reservoir for the subgenus Embecovirus, while bats are the reservoir for the other subgenera.

<span class="mw-page-title-main">Human coronavirus OC43</span> Species of virus

Human coronavirus OC43 (HCoV-OC43) is a member of the species Betacoronavirus 1, which infects humans and cattle. The infecting coronavirus is an enveloped, positive-sense, single-stranded RNA virus that enters its host cell by binding to the N-acetyl-9-O-acetylneuraminic acid receptor. OC43 is one of seven coronaviruses known to infect humans. It is one of the viruses responsible for the common cold and may have been responsible for the 1889–1890 pandemic. It has, like other coronaviruses from genus Betacoronavirus, subgenus Embecovirus, an additional shorter spike protein called hemagglutinin-esterase (HE).

<i>Alphacoronavirus</i> Genus of viruses

Alphacoronaviruses (Alpha-CoV) are members of the first of the four genera of coronaviruses. They are positive-sense, single-stranded RNA viruses that infect mammals, including humans. They have spherical virions with club-shaped surface projections formed by trimers of the spike protein, and a viral envelope.

<i>Betacoronavirus 1</i> Species of virus

Betacoronavirus 1 is a species of coronavirus which infects humans and cattle. The infecting virus is an enveloped, positive-sense, single-stranded RNA virus and is a member of the genus Betacoronavirus and subgenus Embecovirus. Like other embecoviruses, it has an additional shorter spike-like surface protein called hemagglutinin esterase (HE) as well as the larger coronavirus spike protein.

<i>Human coronavirus 229E</i> Species of virus

Human coronavirus 229E (HCoV-229E) is a species of coronavirus which infects humans and bats. It is an enveloped, positive-sense, single-stranded RNA virus which enters its host cell by binding to the APN receptor. Along with Human coronavirus OC43, it is one of the viruses responsible for the common cold. HCoV-229E is a member of the genus Alphacoronavirus and subgenus Duvinacovirus.

Tylonycteris bat coronavirus HKU4 is an enveloped, positive-sense single-stranded RNA virus mammalian Group 2 Betacoronavirus that has been found to be genetically related to the Middle East respiratory syndrome-related coronavirus (MERS-CoV) that is responsible for the 2012 Middle East respiratory syndrome coronavirus outbreak in Saudi Arabia, Jordan, United Arab Emirates, the United Kingdom, France, and Italy.

<i>Embecovirus</i> Subgenus of viruses

Embecovirus is a subgenus of coronaviruses in the genus Betacoronavirus. The viruses in this subgenus, unlike other coronaviruses, have a hemagglutinin esterase (HE) gene. The viruses in the subgenus were previously known as group 2a coronaviruses.

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<span class="mw-page-title-main">History of coronavirus</span> History of the virus group

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<span class="mw-page-title-main">ORF3a</span> Gene found in coronaviruses of the subgenus Sarbecovirus

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References

  1. ↑ Lim, Yvonne Xinyi; Ng, Yan Ling; Tam, James P.; Liu, Ding Xiang (2016-07-25). "Human Coronaviruses: A Review of Virus–Host Interactions". Diseases. 4 (3): 26. doi: 10.3390/diseases4030026 . ISSN   2079-9721. PMC   5456285 . PMID   28933406. See Table 1.
  2. 1 2 3 4 Woo, P. C. Y.; Lau, S. K. P.; Chu, C.-m.; Chan, K.-h.; Tsoi, H.-w.; Huang, Y.; Wong, B. H. L.; Poon, R. W. S.; Cai, J. J.; Luk, W.-k.; Poon, L. L. M.; Wong, S. S. Y.; Guan, Y.; Peiris, J. S. M.; Yuen, K.-y. (2004). "Characterization and Complete Genome Sequence of a Novel Coronavirus, Coronavirus HKU1, from Patients with Pneumonia". Journal of Virology. 79 (2): 884–95. doi:10.1128/JVI.79.2.884-895.2005. PMC   538593 . PMID   15613317.
  3. ↑ Lim, Yvonne Xinyi; Ng, Yan Ling; Tam, James P.; Liu, Ding Xiang (2016-07-25). "Human Coronaviruses: A Review of Virus–Host Interactions". Diseases. 4 (3): 26. doi: 10.3390/diseases4030026 . ISSN   2079-9721. PMC   5456285 . PMID   28933406. See Table 1.
  4. ↑ Woo, Patrick C. Y.; Huang, Yi; Lau, Susanna K. P.; Yuen, Kwok-Yung (2010-08-24). "Coronavirus Genomics and Bioinformatics Analysis". Viruses. 2 (8): 1804–1820. doi: 10.3390/v2081803 . ISSN   1999-4915. PMC   3185738 . PMID   21994708. In all members of Betacoronavirus subgroup A, a haemagglutinin esterase (HE) gene, which encodes a glycoprotein with neuraminate O-acetyl-esterase activity and the active site FGDS, is present downstream to ORF1ab and upstream to S gene (Figure 1).
  5. 1 2 Lau, S. K. P.; Woo, P. C. Y.; Yip, C. C. Y.; Tse, H.; Tsoi, H.-w.; Cheng, V. C. C.; Lee, P.; Tang, B. S. F.; Cheung, C. H. Y.; Lee, R. A.; So, L.-y.; Lau, Y.-l.; Chan, K.-h.; Yuen, K.-y. (2006). "Coronavirus HKU1 and Other Coronavirus Infections in Hong Kong". Journal of Clinical Microbiology. 44 (6): 2063–71. doi:10.1128/JCM.02614-05. PMC   1489438 . PMID   16757599.
  6. ↑ Pyrc, Krzysztof; Sims, Amy C.; Dijkman, Ronald; Jebbink, Maarten; Long, Casey; Deming, Damon; Donaldson, Eric; Vabret, Astrid; Baric, Ralph; van der Hoek, Lia; Pickles, Raymond (November 2010). "Culturing the Unculturable: Human Coronavirus HKU1 Infects, Replicates, and Produces Progeny Virions in Human Ciliated Airway Epithelial Cell Cultures". Journal of Virology. 84 (21): 11255–11263. doi:10.1128/JVI.00947-10. ISSN   0022-538X. PMC   2953148 . PMID   20719951.
  7. ↑ Huang, Xingchuan; Dong, Wenjuan; Milewska, Aleksandra; Golda, Anna; Qi, Yonghe; Zhu, Quan K.; Marasco, Wayne A.; Baric, Ralph S.; Sims, Amy C.; Pyrc, Krzysztof; Li, Wenhui; Sui, Jianhua (2015-07-15). Perlman, S. (ed.). "Human Coronavirus HKU1 Spike Protein Uses O -Acetylated Sialic Acid as an Attachment Receptor Determinant and Employs Hemagglutinin-Esterase Protein as a Receptor-Destroying Enzyme". Journal of Virology. 89 (14): 7202–7213. doi:10.1128/JVI.00854-15. ISSN   0022-538X. PMC   4473545 . PMID   25926653.
  8. ↑ Pronker, Matti F.; Creutznacher, Robert; Drulyte, Ieva; Hulswit, Ruben J.G.; Li, Zeshi; Van Kuppeveld, Frank J.M.; Snijder, Joost; Lang, Yifei; Bosch, Berend-Jan; Boons, Geert-Jan; Frank, Martin; Groot, Raoul J. de; Hurdiss, Daniel L. (2023). "Sialoglycan binding triggers spike opening in a human coronavirus". bioRxiv   10.1101/2023.04.20.536837 .
  9. ↑ Milewska, Aleksandra; Falkowski, Katherine; Kulczycka, Magdalena; Bielecka, Ewa; Naskalska, Antonina; Mak, Pawel; Lesner, Adam; Ochman, Marek; Urlik, Maciej; Diamandis, Elftherios; Prassas, Ioannis; Potempa, Jan; Kantyka, Tomasz; Pyrc, Krzysztof (2020-11-24). "Kallikrein 13 serves as a priming protease during infection by the human coronavirus HKU1". Science Signaling. 13 (659). doi:10.1126/scisignal.aba9902. ISSN   1945-0877. PMC   7857416 . PMID   33234691.
  10. ↑ Fung, To Sing; Liu, Ding Xiang (2019). "Human Coronavirus: Host-Pathogen Interaction". Annual Review of Microbiology. 73: 529–557. doi: 10.1146/annurev-micro-020518-115759 . PMID   31226023.
  11. ↑ Leung, Daniel (20 January 2019). "Coronaviruses (including SARS)". Infectious Disease Advisor. Decision Support in Medicine, LLC. Retrieved 1 August 2020.
  12. ↑ Kirchdoerfer, Robert N.; Cottrell, Christopher A.; Wang, Nianshuang; Pallesen, Jesper; Yassine, Hadi M.; Turner, Hannah L.; Corbett, Kizzmekia S.; Graham, Barney S.; McLellan, Jason S.; Ward, Andrew B. (March 2016). "Pre-fusion structure of a human coronavirus spike protein". Nature. 531 (7592): 118–121. Bibcode:2016Natur.531..118K. doi: 10.1038/nature17200 . PMC   4860016 . PMID   26935699.
  13. ↑ Hurdiss DL, Drulyte I, Lang Y, Shamorkina TM, Pronker MF, van Kuppeveld FJ, Snijder J, de Groot RJ (16 November 2020). "Cryo-EM structure of coronavirus-HKU1 haemagglutinin esterase reveals architectural changes arising from prolonged circulation in humans". Nature Communications. 11 (1): 4646. Bibcode:2020NatCo..11.4646H. doi: 10.1038/s41467-020-18440-6 . PMC   7495468 . PMID   32938911.
  14. ↑ Sloots, T; McErlean, P; Speicher, D; Arden, K; Nissen, M; MacKay, I (2006). "Evidence of human coronavirus HKU1 and human bocavirus in Australian children". Journal of Clinical Virology. 35 (1): 99–102. doi: 10.1016/j.jcv.2005.09.008 . PMC   7108338 . PMID   16257260.
  15. ↑ Esper, Frank; Weibel, Carla; Ferguson, David; Landry, Marie L.; Kahn, Jeffrey S. (2006). "Coronavirus HKU1 Infection in the United States". Emerging Infectious Diseases. 12 (5): 775–9. doi:10.3201/eid1205.051316. PMC   3374449 . PMID   16704837.
  16. ↑ Vabret, A.; Dina, J.; Gouarin, S.; Petitjean, J.; Corbet, S.; Freymuth, F. (2006). "Detection of the New Human Coronavirus HKU1: A Report of 6 Cases". Clinical Infectious Diseases. 42 (5): 634–9. doi: 10.1086/500136 . PMC   7107802 . PMID   16447108.
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