Genetic Relatedness of the Novel Human Group C Betacoronavirus to Tylonycteris Bat Coronavirus HKU4 and Pipistrellus Bat Coronavirus HKU5

Overview

Journal Emerg Microbes Infect

Specialty Infectious Diseases

Date 2015 Jun 4

PMID 26038405

Citations 71

Authors

Patrick Cy Woo

Susanna Kp Lau

Kenneth Sm Li

Alan Kl Tsang

Kwok-Yung Yuen

Affiliations

Soon will be listed here.

Abstract

The recent outbreak of severe respiratory infections associated with a novel group C betacoronavirus (HCoV-EMC) from Saudi Arabia has drawn global attention to another highly probable "SARS-like" animal-to-human interspecies jumping event in coronavirus (CoV). The genome of HCoV-EMC is most closely related to Tylonycteris bat coronavirus HKU4 (Ty-BatCoV HKU4) and Pipistrellus bat coronavirus HKU5 (Pi-BatCoV HKU5) we discovered in 2006. Phylogenetically, HCoV-EMC is clustered with Ty-BatCoV HKU4/Pi-BatCoV HKU5 with high bootstrap supports, indicating that HCoV-EMC is a group C betaCoV. The major difference between HCoV-EMC and Ty-BatCoV HKU4/Pi-BatCoV HKU5 is in the region between S and E, where HCoV-EMC possesses five ORFs (NS3a-NS3e) instead of four, with low (31%-62%) amino acid identities to Ty-BatCoV HKU4/Pi-BatCoV HKU5. Comparison of the seven conserved replicase domains for species demarcation shows that HCoV-EMC is a novel CoV species. More intensive surveillance studies in bats and other animals may reveal the natural host of HCoV-EMC.

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