Phylogenetic analysis of the envelope protein (domain III) of dengue 4 viruses

Javier Mota, José Ramos-Castañeda, Rebeca Rico-Hesse, Celso Ramos

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Objective. To evaluate the genetic variability of domain III of envelope (E) protein and to estimate phylogenetic relationships of dengue 4 (Den-4) viruses isolated in Mexico and from other endemic areas of the world. Material and Methods. A phylogenetic study of domain III of envelope (E) protein of Den-4 viruses was conducted in 1998 using virus strains from Mexico and other parts of the world, isolated in different years. Specific primers were used to amplify by RT-PCR the domain III and to obtain nucleotide sequence. Based on nucleotide and deduced aminoacid sequence, genetic variability was estimated and a phylogenetic tree was generated. To make an easy genetic analysis of domain III region, a Restriction Fragment Length Polymorphism (RFLP) assay was performed, using six restriction enzymes. Results. Study results demonstrate that nucleotide and aminoacid sequence analysis of domain III are similar to those reported from the complete E protein gene. Based on the RFLP analysis of domain III using the restriction enzymes Nla III, Dde 1 and Cfo 1, Den-4 viruses included in this study were clustered into genotypes 1 and 2 previously reported. Conclusions. Study results suggest that domain III may be used as a genetic marker for phylogenetic and molecular epidemiology studies of dengue viruses.

Original languageEnglish (US)
Pages (from-to)228-236
Number of pages9
JournalSalud Publica de Mexico
Issue number3
StatePublished - 2002
Externally publishedYes


  • Den-4 virus
  • Envelope protein
  • Phylogenetic analysis

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


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