Genetic Characterization of Hemagglutinin on Measles Virus Epidemic Strain Genotype H1a in Liaoning Province (China) from 1997 to 2014.
- Author:
Yan WANG
;
Yan MA
;
Xiaoting XU
;
Shuang HAO
;
Yue HAN
;
Wenqing YAO
;
Zhuo ZHAO
- Publication Type:Journal Article
- MeSH:
Amino Acid Sequence;
China;
epidemiology;
Databases, Genetic;
Epidemics;
Evolution, Molecular;
Genotype;
Hemagglutinins, Viral;
chemistry;
genetics;
Measles;
epidemiology;
Measles virus;
genetics;
physiology;
Molecular Sequence Data;
Mutation;
Phylogeny
- From:
Chinese Journal of Virology
2015;31(4):410-419
- CountryChina
- Language:Chinese
-
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.
