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Identification of a novel HERV-K(HML10): comprehensive characterization and comparative analysis in non-human primates provide insights about HML10 proviruses structure and diffusion
University of Cagliari, Cagliari, Italy.
University of Cagliari, Cagliari, Italy.
University of Cagliari, Cagliari, Italy.
University of Cagliari, Cagliari, Italy.
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2017 (English)In: Mobile DNA, ISSN 1759-8753, E-ISSN 1759-8753, Vol. 8, article id 15Article in journal (Refereed) Published
Abstract [en]

About half of the human genome is constituted of transposable elements, including human endogenous retroviruses (HERV). HERV sequences represent the 8% of our genetic material, deriving from exogenous infections occurred millions of years ago in the germ line cells and being inherited by the offspring in a Mendelian fashion. HERV-K elements (classified as HML1-10) are among the most studied HERV groups, especially due to their possible correlation with human diseases. In particular, the HML10 group was reported to be upregulated in persistent HIV-1 infected cells as well as in tumor cells and samples, and proposed to have a role in the control of host genes expression. An individual HERV-K(HML10) member within the major histocompatibility complex C4 gene has even been studied for its possible contribution to type 1 diabetes susceptibility. Following a first characterization of the HML10 group at the genomic level, performed with the innovative software RetroTector, we have characterized in detail the 8 previously identified HML10 sequences present in the human genome, and an additional HML10 partial provirus in chromosome 1p22.2 that is reported here for the first time. Using a combined approach based on RetroTector software and a traditional Genome Browser Blat search, we identified a novel HERV-K(HML10) sequence in addition to the eight previously reported in the human genome GRCh37/hg19 assembly. We fully characterized the nine HML10 sequences at the genomic level, including their classification in two types based on both structural and phylogenetic characteristics, a detailed analysis of each HML10 nucleotide sequence, the first description of the presence of an Env Rec domain in the type II HML10, the estimated time of integration of individual members and the comparative map of the HML10 proviruses in non-human primates. We performed an unambiguous and exhaustive analysis of the nine HML10 sequences present in GRCh37/hg19 assembly, useful to increase the knowledge of the group's contribution to the human genome and laying the foundation for a better understanding of the potential physiological effects and the tentative correlation of these sequences with human pathogenesis.

Place, publisher, year, edition, pages
2017. Vol. 8, article id 15
Keywords [en]
Human endogenous retroviruses, Herv, HML10, Herv-k(C4), RetroTector, Cancer, Autoimmune diseases
National Category
Microbiology in the medical area
Identifiers
URN: urn:nbn:se:uu:diva-341942DOI: 10.1186/s13100-017-0099-7ISI: 000414465600001PubMedID: 29118853OAI: oai:DiVA.org:uu-341942DiVA, id: diva2:1183341
Available from: 2018-02-16 Created: 2018-02-16 Last updated: 2018-02-16Bibliographically approved

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Blomberg, Jonas

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