-
- Home
- Journals
- Journal of Biosciences
-
Subhasish Mukhopadhyay
Articles written in Journal of Biosciences
-
-
Volume 39 Issue 4 September 2014 pp 659-672 Articles
Conserved C-terminal nascent peptide binding domain of HYPK facilitates its chaperone-like activity
Swasti Raychaudhuri Rachana Banerjee Subhasish Mukhopadhyay Nitai P Bhattacharyya
Human HYPK (Huntingtin Yeast-two-hybrid Protein K) is an intrinsically unstructured chaperone-like protein with no sequence homology to known chaperones. HYPK is also known to be a part of ribosome-associated protein complex and present in polysomes. The objective of the present study was to investigate the evolutionary influence on HYPK primary structure and its impact on the protein’s function. Amino acid sequence analysis revealed 105 orthologs of human HYPK from plants, lower invertebrates to mammals. C-terminal part of HYPK was found to be particularly conserved and to contain nascent polypeptide-associated alpha subunit (NPAA) domain. This region experiences highest selection pressure, signifying its importance in the structural and functional evolution. NPAA domain of human HYPK has unique amino acid composition preferring glutamic acid and happens to be more stable from a conformational point of view having higher content of 𝛼-helices than the rest. Cell biology studies indicate that overexpressed C-terminal human HYPK can interact with nascent proteins, co-localizes with huntingtin, increases cell viability and decreases caspase activities in Huntington’s disease (HD) cell culture model. This domain is found to be required for the chaperone-like activity of HYPK
in vivo . Our study suggested that by virtue of its flexibility and nascent peptide binding activity, HYPK may play an important role in assisting protein (re)folding.
-
-
Journal of Biosciences
Volume 48, 2023
All articles
Continuous Article Publishing mode
-
Journal of Biosciences | News
-
To trigger further research on plant mitochondria, the Journal of Biosciences is bringing out a special issue titled "Plant Mitochondria: Properties and Interactions with Other Organelles".
Plant mitochondria are quite distinct and have unique features, such as a cyanide-insensitive alternate pathway. They also interact with chloroplasts to optimize photosynthetic carbon assimilation.
Submissions are welcome until 30 July 2023. The contributions can be original articles, short communications, reviews, or mini-reviews on any topic related to plant mitochondria.
Authors can submit their articles online at https://www.editorialmanager.com/jbsc/default2.aspx
Posted on April 12, 2023< -
Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
Forthcoming Special issue.
-