[Genetic Characterization of Hemagglutinin on Measles Virus Epidemic Strain Genotype H1a in Liaoning Province (China) from 1997 to 2014].
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| Abstract |
To wished to characterize the hemagglutinin (H) gene of the measles virus epidemic strain H1a in Liaoning Province (China) from 1997-2014 to provide a basis for the control and elimination of measles. All 63 measles virus strains were the H1a genotype. Fragments of the H gene (1854 nucleotides) and nucleoprotein (N) gene (450 nucleotides) were amplified by reverse transcription-polymerase chain reaction (RT-PCR) and the PCR products sequenced and analyzed. Phylogenetic-trees were constructed with reference strains of the genotype-H measles virus downloaded from GenBank, including Chinese measles virus strains isolated in 1993-1994 and the vaccine reference strains S-191 and C-47. Sixty-three strains of the measles virus in 1997-2014 belonged to genotype H1a. The mean evolutionary rate for gene N-450 was higher than that for the H gene. All 63 strains of the measles virus were mutated from: serine (Ser S) to asparagine (Asn N) in the 240th amino acid; arginine (Arg R) to glycine (Gly G) in the 243th; and tyrosine (Tyr Y) to Asn N in the 481th amino acid. All measles virus strains in cluster 2 were mutated from proline (Pro P) to leucine (Leu L) in the 397th amino acid. The other neutralization sites showed no apparent difference when comparing the nucleotides/amino acids of the H gene of S191 vaccine strains.
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| Authors | Yan Wang, Yan Ma, Xiaoting Xu, Shuang Hao, Yue Han, Wenqing Yao, Zhuo Zhao |
| Journal | Bing du xue bao = Chinese journal of virology (Bing Du Xue Bao) Vol. 31 Issue 4 Pg. 410-9 (Jul 2015) ISSN: 1000-8721 [Print] China |
| PMID | 26524914 (Publication Type: English Abstract, Journal Article) |
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