A ubiquitin ligase is a protein that recruits an E2 ubiquitin-conjugating enzyme that has been loaded with ubiquitin, recognizes a protein substrate, and assists or directly catalyzes the transfer of ubiquitin from the E2 to the protein substrate. In simple and more general terms, the ligase enables movement of ubiquitin from a ubiquitin carrier to another thing by some mechanism. The ubiquitin, once it reaches its destination, ends up being attached by an isopeptide bond to a lysine residue, which is part of the target protein. E3 ligases interact with both the target protein and the E2 enzyme, and so impart substrate specificity to the E2. Commonly, E3s polyubiquitinate their substrate with Lys48-linked chains of ubiquitin, targeting the substrate for destruction by the proteasome. However, many other types of linkages are possible and alter a protein's activity, interactions, or localization. Ubiquitination by E3 ligases regulates diverse areas such as cell trafficking, DNA repair, and signaling and is of profound importance in cell biology. E3 ligases are also key players in cell cycle control, mediating the degradation of cyclins, as well as cyclin dependent kinase inhibitor proteins. The human genome encodes over 600 putative E3 ligases, allowing for tremendous diversity in substrates.
Protein kinase B (PKB), also known as Akt, is the collective name of a set of three serine/threonine-specific protein kinases that play key roles in multiple cellular processes such as glucose metabolism, apoptosis, cell proliferation, transcription, and cell migration.
Protein tyrosine phosphatases (EC 3.1.3.48, systematic name protein-tyrosine-phosphate phosphohydrolase) are a group of enzymes that remove phosphate groups from phosphorylated tyrosine residues on proteins:
Phosphatase and tensin homolog (PTEN) is a phosphatase in humans and is encoded by the PTEN gene. Mutations of this gene are a step in the development of many cancers, specifically glioblastoma, lung cancer, breast cancer, and prostate cancer. Genes corresponding to PTEN (orthologs) have been identified in most mammals for which complete genome data are available.
Mitogen-activated protein kinase 8 is a ubiquitous enzyme that in humans is encoded by the MAPK8 gene.
E3 ubiquitin-protein ligase NEDD4, also known as neural precursor cell expressed developmentally down-regulated protein 4 is an enzyme that is, in humans, encoded by the NEDD4 gene.
Ubiquitin-conjugating enzyme E2 D2 is a protein that in humans is encoded by the UBE2D2 gene.
The Akt signaling pathway or PI3K-Akt signaling pathway is a signal transduction pathway that promotes survival and growth in response to extracellular signals. Key proteins involved are PI3K and Akt.
Shantanu Chowdhury is an Indian structural biologist and a professor at Institute of Genomics and Integrative Biology of the Council of Scientific and Industrial Research. He is known for developing a mechanism for gene regulation mediated by DNA Secondary-Structure in diverse cellular contexts. An elected fellow of the National Academy of Sciences, India, he is a recipient of the National Bioscience Award for Career Development of the Department of Biotechnology in 2010. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 2012, for his contributions to biological sciences.
Suvendra Nath Bhattacharyya is an Indian molecular biologist, epigeneticist and the principal scientist at the Indian Institute of Chemical Biology of the Council of Scientific and Industrial Research. He is a recipient of the Swarnajayanthi Fellowship of the Department of Science and Technology and the National Bioscience Award of the Department of Biotechnology. The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 2016, for his contributions to biological sciences.
Ramanathan Sowdhamini is an Indian computational biologist, bioinformatician and a professor at the department of biochemistry, biophysics and bioinformatics of the National Centre for Biological Sciences, a TIFR research facility located in Bengaluru. Known for computational studies in the field of Protein Science, Sowdhamini is also associated with the Institute for Stem Cell Biology and Regenerative Medicine as a collaborator and is an elected fellow of the Indian Academy of Sciences as well as the Indian National Science Academy. The Department of Biotechnology of the Government of India awarded her the National Bioscience Award for Career Development, one of the highest Indian science awards, for her contributions to biosciences in 2007.
Ranjan Sen is an Indian microbiologist, biophysicist and a senior scientist as well as the head of the Laboratory of Transcription at the Centre for DNA Fingerprinting and Diagnostics. Known for his studies in the field of prokaryotic transcription, Sen is an elected fellow of the Indian National Science Academy and the National Academy of Sciences, India. The Department of Biotechnology of the Government of India awarded him the National Bioscience Award for Career Development, one of the highest Indian science awards, for his contributions to biosciences in 2007.
Nihar Ranjan Jana is an Indian neuroscientist and professor at the IIT Kharagpur, known for his studies on E3 ubiquitin ligases, protein homeostasis and neurodegenerative disorders. Jana is an elected fellow of the National Academy of Sciences, India. The Department of Biotechnology of the Government of India awarded him the National Bioscience Award for Career Development, in 2008 and TATA Innovation Fellowship in 2014 for his contributions to Neurodegenerative diseases.
Sangita Mukhopadhyay is an Indian molecular cell biologist, immunologist and the head of the molecular biology group at the Centre for DNA Fingerprinting and Diagnostics. Known for her studies on immunosuppression and infection biology, Mukhopadhyay is an elected fellow of all the three major Indian science academies namely the Indian National Science Academy, the Indian Academy of Sciences and the National Academy of Sciences, India. The Department of Biotechnology of the Government of India awarded her the National Bioscience Award for Career Development, one of the highest Indian science awards, for her contributions to biosciences in 2008.
Mohan Ramachandra Wani was an Indian cell biologist, immunologist and a scientist at the National Centre for Cell Science. Known for his studies in the fields of bone and cartilage cell biology, osteoimmunology, and regenerative medicine, Wani was an elected fellow of the National Academy of Sciences, India and an elected member of Guha Research Conference. The Department of Biotechnology of the Government of India awarded him the National Bioscience Award for Career Development, one of the highest Indian science awards, for his contributions to biosciences in 2009.
Vinay Kumar Nandicoori is an Indian immunologist, biotechnologist and currently the director of Centre for Cellular and Molecular Biology, India. He is known for his studies on the kinase-mediated signaling networks in Mycobacterium tuberculosis, the causative pathogen of tuberculosis. Holder of a master's degree in biotechnology from the Indian Institute of Technology, Bombay and a PhD from the Indian Institute of Science, Nandicoori did his post doctoral work the University of Virginia and Texas A & M University.
Alok Krishna Sinha is an Indian molecular biologist, biochemist, plant physiologist and a staff scientist Grade VII at the National Institute of Plant Genome Research (NIPGR). Known for his research on Mitogen-activated protein kinase (MAPK) cascade in plants, he is a three-time Alexander von Humboldt Fellow and an elected fellow of the National Academy of Sciences, India. The Department of Biotechnology of the Government of India awarded him the National Bioscience Award for Career Development, one of the highest Indian science awards, for his contributions to biosciences, in 2013.
Ganesh Nagaraju is an Indian biochemist, geneticist, cancer biologist and a full professor at the Department of Biochemistry of the Indian Institute of Science. He has been studying DNA damage responses in mammalian cells, and mechanisms underlying chromosome instability genetic diseases and cancer. The Department of Biotechnology of the Government of India awarded him the National Bioscience Award for Career Development, for his contributions to biosciences, in 2015. In 2018, Nagaraju received the Shanti Swarup Bhatnagar Prize for Science and Technology in Biological Sciences from CSIR. This award is given in recognition of outstanding contributions to Science and Technology, and is considered one of the highest awards for science in India.
Arun Kumar Shukla is an Indian structural biologist and the Joy-Gill Chair professor at the department of biological sciences and bioengineering at the Indian Institute of Technology, Kanpur. Known for his studies on G protein-coupled receptor, Shukla is a Wellcome Trust-DBT Intermediate Fellow and a recipient of the SwarnaJayanti Fellowship of the Department of Science and Technology. The Department of Biotechnology of the Government of India awarded him the National Bioscience Award for Career Development, one of the highest Indian science awards, for his contributions to biosciences, in 2017/18. He received the 2021 Shanti Swarup Bhatnagar Prize for Science and Technology in Biological Science. He was awarded the Infosys Prize 2023 in Life Sciences his outstanding contributions to the biology of G-protein coupled receptors (GPCRs).
Ashwani Kumar is an Indian microbiologist and the Senior Principal Scientist at the Institute of Microbial Technology (ImTech). He is known for his studies on Mycobacterium tuberculosis, the causative agent of tuberculosis. His laboratory focuses on understanding the reasons for drug tolerance observed in humans. His laboratory hypothesizes that tuberculosis is a biofilm infection, so its treatment needs the administration of multiple drugs for at least six months. The Department of Science and Technology has awarded him Swarnajayanti Fellowship for 2016–2017. Department of Biotechnology has awarded him the National Bioscience Prize (2017-18). He was also selected for DBT/Wellcome Trust India Alliance Senior Fellowship. He was elected as a Fellow of the National Academy of Sciences, India, in 2022. For his contributions in tuberculosis pathogenesis, he was awarded with Shanti Swarup Bhatnagar Prize for Science and Technology 2022. He is considered as one of India's Leading Scientist in the field of Tuberculosis and his lab is doing some of the best research in India.
