title: Retrospective phylogenetic analysis of circulating BA genotype of human respiratory syncytial virus with 60 bp duplication from New Delhi, India during 2007-2010.
abstract: Human respiratory syncytial virus (hRSV) is the most common viral pathogen of acute lower respiratory tract infection in infants and young children. The G protein of hRSV is the trans-membrane glycoprotein that is involved in the attachment of virion with the host cell. The nasopharyngeal aspirates were subjected to RT-PCR for the second hypervariable region of the G protein gene in the present investigation. Sequencing and phylogenetic analysis revealed that all the study strains clustered within the BA genotype. The study sequences further clustered in BA-9, BA-7, BA-10 and BA-12 subgroups within the BA genotype. The G proteins of the study sequences were predicted to encode 312 and 319 amino acids. Three different N-linked glycosylation sites were observed in the deduced 93-100 amino acid region. There were 40-43 serine and threonine residues that are the potential O-linked glycosylation sites. The non-synonymous/synonymous (dN/dS) ratio was less than one indicating negative selection pressure for amino acid change in the analyzed region of the G protein. The present investigation provides information on circulating strains of BA genotype from New Delhi, India. Further elaborate investigations of the BA viruses from different regions of the world will establish the basis of the rapid global spread and evolutionary pattern of this expanding genotype.
authors.affiliation: Department of Microbiology, All India Institute of Medical Sciences, New Delhi, 110029 India.
authors.forename: Vln
authors.initials: V
authors.lastname: Raghuram S
authors.affiliation: Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025 India.
authors.forename: Wajihul Hasan
authors.initials: WH
authors.lastname: Khan
authors.affiliation: Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025 India.
authors.forename: Farah
authors.initials: F
authors.lastname: Deeba
authors.affiliation: School of Medicine, Center for Global Health, Colorado School of Public Health, 13199 E Montview Blvd, Suite 310, A090, Aurora, CO 80045-7202 USA.
authors.forename: Wayne
authors.initials: W
authors.lastname: Sullender
authors.affiliation: Department of Microbiology, All India Institute of Medical Sciences, New Delhi, 110029 India.|Department of Microbiology, Faculty of Medicine and Health Science, Shree Guru Gobind Singh Tricentenary University, Gurgaon, Haryana 122505 India.
authors.forename: Shobha
authors.initials: S
authors.lastname: Broor
authors.affiliation: Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025 India.
authors.forename: Shama
authors.initials: S
authors.lastname: Parveen
keywords: BA genotype; G protein gene; Human respiratory syncytial virus; Phylogenetic analysis