Notable sequence homology of the ORF10 protein introspects the architecture of SARS-CoV-2

Sk. Sarif Hassan, Diksha Attrish, Shinjini Ghosh, Pabitra Pal Choudhury, Vladimir N. Uversky, Alaa A.a. Aljabali, Kenneth Lundstrom, Bruce D. Uhal, Nima Rezaei, Murat Seyran, Damiano Pizzol, Parise Adadi, Antonio Soares, Tarek Mohamed Abd El-aziz, Ramesh Kandimalla, Murtaza M. Tambuwala, Gajendra Kumar Azad, Samendra P. Sherchan, Wagner Baetas-da-cruz, Amos LalGiorgio Palù, Kazuo Takayama, Ángel Serrano-aroca, Debmalya Barh, Adam M. Brufsky

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The current Coronavirus Disease 19 (COVID-19) pandemic, caused by Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) shows similar pathology to MERS and SARS-CoV, with a current estimated fatality rate of 1.4%. Open reading frame 10 (ORF10) is a unique SARS-CoV-2 accessory protein, which contains eleven cytotoxic T lymphocyte (CTL) epitopes each of nine amino acids in length. Twenty-two unique SARS-CoV-2 ORF10 variants have been identified based on missense mutations found in sequence databases. Some of these mutations are predicted to decrease the stability of ORF10 in silico physicochemical and structural comparative analyses were carried out on SARS-CoV-2 and Pangolin-CoV ORF10 proteins, which share 97.37% amino acid (aa) homology. Though there is a high degree of ORF10 protein similarity of SARS-CoV-2 and Pangolin-CoV, there are differences of these two ORF10 proteins related to their sub-structure (loop/coil region), solubility, antigenicity and shift from strand to coil at aa position 26 (tyrosine). SARS-CoV-2 ORF10, which is apparently expressed in vivo since reactive T cell clones are found in convalescent patients should be monitored for changes which could correlate with the pathogenesis of COVID-19.
Original languageEnglish
Pages (from-to)801-809
Number of pages9
JournalInternational Journal of Biological Macromolecules
Early online date16 Apr 2021
Publication statusPublished (in print/issue) - 30 Jun 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.


  • COVID-19
  • Intrinsic disorder
  • Mutations
  • ORF10
  • Pangolin-CoV-2020
  • SARS-CoV-2


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