Genetic characteristics of human coronavirus HKU1 in mainland China during 2018.

Publisher: Springer-Verlag Country of Publication: Austria NLM ID: 7506870 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1432-8798 (Electronic) Linking ISSN: 03048608 NLM ISO Abbreviation: Arch Virol Subsets: MEDLINE

Original Publication: Wien, New York, Springer-Verlag.

Coronavirus Infections* ; Coronavirus OC43, Human*/genetics ; Respiratory Tract Infections*; Antibodies, Neutralizing ; Betacoronavirus ; Child ; China/epidemiology ; Humans

Human coronavirus HKU1 (HCoV-HKU1) is a pathogen that causes acute respiratory tract infections in children and circulates worldwide. To investigate the molecular characteristics and genetic diversity of HCoV-HKU1 in China, a molecular epidemiological analysis based on complete genome sequences was performed. A total of 68 endemic-HCoV-positive samples were identified from 1358 enrolled patients during 2018, including four HCoV-229E, nine HCoV-OC43, 24 HCoV-NL63, and 31 HCoV-HKU1. The detection rate of endemic HCoVs was 5.01% during 2018, while for HCoV-HKU1, it was 2.28%. Eight complete genomic sequences of HCoV-HKU1 were obtained and compared to 41 reference genome sequences corresponding to genotypes A, B, and C, obtained from the GenBank databank. Of the eight HKU1 sequences, four belonged to genotype A and four belonged to genotype B. No genotype C strains were detected in this study. For genotype A, 18 variations in the S protein with respect to the reference sequence were present in more than 5% of the sequences, whereas for genotype B, this number was 25. Most of the amino acid changes occurred in the S1 subunit. No amino acid substitutions were found in the sites that are essential for interaction with neutralizing antibodies, while a 510T amino acid insertion was found in almost one third of genotype B sequences. About 82-83, 85-89, and 88-89 predicted N-glycosylation sites and 7-13, 6-8, and 9 predicted O-glycosylation sites were found among the sequences of genotype A, B, and C, respectively. Six conserved O-glycosylation sites were present in all of the genotype A sequences. Only genotype A and B strains were detected after 2005. The S protein exhibited relatively high diversity, with most of the amino acid changes occurring in the S1 subunit.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.)

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2017ZX10104001-005-010 National Science and Technology Major Project; 2017ZX10103004-004 National Science and Technology Major Project; 2019-I2M-5-026 Chinese Academy of Medical Sciences Initiative for Innovative Medicine

0 (Antibodies, Neutralizing)

Date Created: 20220715 Date Completed: 20221014 Latest Revision: 20221014

20221213

PMC9287133

10.1007/s00705-022-05541-4

35840864