Sequence analysis of genes encoding structural and nonstructural proteins of a human group B rotavirus detected in calcutta, India

Nobumichi Kobayashi, Trailokya N. Naik, Yasuhiro Kusuhara, Triveni Krishnan, Adrish Sen, Sujit K. Bhattacharya, Koki Taniguchi, Mahbub Md.Alam, Tomoko Urasawa, Shozo Urasawa

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Nucleotide sequences of RNA segments encoding structural proteins(VP4, VP6, and VP7) and nonstructural proteins(NSP1 and NSP3) of a human group B rotavirus CAL-1, which was detected in Calcutta, India, were determined and their relatedness with cognate genes of other group B rotaviruses was analyzed. The CAL-1 genes showed generally high sequence identities (more than 90%) to those of human group B rotavirus, adult diarrheal rotavirus (ADRV) in China, while identities with bovine, murine, and ovine viruses were considerably lower (58-73%). Among RNA segments analyzed, sequence identity of the VP6 gene was relatively high compared with other gene segments. In the CAL-1 VP7 sequence, many characteristics were shared by ADRV, but not by other animal group B rotaviruses. In contrast, VP4 and NSP3 of CAL-1 were single animo acid and 23 amino acids longer than those of ADRV strain, respectively, due to differences of a few nucleotides. These findings suggested that human group B rotaviruses CAL-1 and ADRV might have originated from a common ancestral virus distinct from animal group B rotaviruses reported so far, while some notable sequence differences indicated the distinct nature of these viruses.

Original languageEnglish
Pages (from-to)583-588
Number of pages6
JournalJournal of Medical Virology
Volume64
Issue number4
DOIs
Publication statusPublished - 16-07-2001

All Science Journal Classification (ASJC) codes

  • Virology
  • Infectious Diseases

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