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B. Sc.: Banaras Hindu University, India 1983
M. Sc.: Banaras Hindu University, India 1985
Ph.D.: Russian Academy of Sciences, Russia, 1993.
Instructor in charge of BMS 575 (Cellular and Molecular Biology)
Singh group works on the interface of fundamental and translational biology. General interest of his group has been to understand the mechanism of alternative splicing, a vital process that increases the coding potential of genome in all higher eukaryotes. Alternative splicing is also associated with a growing number of diseases including neurological and neuromuscular disorders, cardiovascular disorders and cancer. Particular focus of his group has been to understand the molecular basis of Spinal Muscular Atrophy (SMA), a debilitating genetic disease of infants and children. His award-winning discovery relates to finding a unique regulatory element located within the non-coding region (or intron) of Survival Motor Neuron (SMN) gene. He has termed this novel regulatory element as “Intronic Splicing Silencer N1”, which is abbreviated as “ISS-N1” (US patent # 7,838,657). ISS-N1 remains the most studied antisense target for splicing correction in a human genetic disease. ISIS Pharmaceuticals has recently launched phase 3 clinical trial of ISS-N1-targeting drug ISIS-SMNRX. If successful, this will be the first antisense drug to restore a full-length functional protein in a human disease (watch a video on YouTube).
Singh group continues to develop additional targets and antisense formulations for an efficient correction of aberrant splicing in SMA (see news links below). In a paradigm shifting discovery, Singh lab has recently reported a unique RNA structure formed by a deep intronic sequence as a regulator of SMA gene splicing (Slide Presentation). This discovery provides lead for developing yet another oligonucleotide-based therapy of SMA.
In addition to above accomplishments, Singh lab has made seminal contribution towards a better understanding of role of RNA binding proteins in regulation of splicing of SMN2 exon 7, skipping of which is intimately linked to SMA pathogenesis. His discoveries are relevant for uncovering the novel mechanisms of genome-wide regulation of alternative splicing in normal and pathological conditions. His other interests include RNA-protein interactions and isolation of RNA aptamers as detection and diagnostic tools.
Current funding source: National Institutes of Health (NIH) and Salsbury Endowment
2006 Presidential Early Career Award for Scientists and Engineers (PECASE) (The highest civilian award given to young US scientists) Website
Named Endowed Dr. John G. and Mrs. Doris Salsbury Chair (Since 2008)
Permanent member of NIH CDIN study section (2008-2012)
American Society for Microbiology (ASM)
The Genetics Society of America (GSA)
The RNA Society
Society for Neuroscience (SfN)
American Association for Advancement of Science (AAAS)
American Society for Human Genetics (ASHG)
American Society for Cell Biology (ASCB)
Oligonucleotide Therapeutic Society (OTS)
Osborne Club, Iowa State University
Seo J, Singh NN, Ottesen EW, Lee BM, Singh RN. (2016) A novel human-specific splice isoform alters the critical C-terminus of Survival Motor Neuron protein. Sci Rep. 6:30778. Pubmed.
Seo J, Singh NN, Ottesen EW, Sivanesan S, Shishimorova M, Singh RN. (2016) Oxidative Stress Triggers Body-Wide Skipping of Multiple Exons of the Spinal Muscular Atrophy Gene. PLoS One. 11(4):e0154390. doi: 10.1371/journal.pone.0154390. eCollection 2016. Pubmed.
Ottesen EW, Howell MD, Singh NN, Seo J, Whitley EM, Singh RN. (2016) Sci Rep. 6:20193. doi: 10.1038/srep20193. Pubmed.
Singh NN, Lee BM, DiDonato CJ and Singh RN (2015) Mechanistic principles of antisense targets for the treatment of spinal muscular atrophy. Future Medicinal Chemistry, 7, 1793-1808, Pubmed.
Singh NN, Lee BM and Singh RN (2015) Splicing regulation in spinal muscular atrophy by RNA structure formed by long-distance interactions. Annanls of New York Academy of Sciences, 1341, 176-187, Pubmed, Pdf, Google citations.
Keil LM, Seo J, Howell MD, Hsu WH, Singh RN and DiDonato CJ (2014) A short antisense oligonucleotide ameliorates sumptoms of severe mouse models of spinal muscular atrophy. Molecular Therapy-Nucleic Acids, 3, e174, PubMed, Pdf, Google citations
Singh NN, Lawler MN, Ottesen EW, Upreti D, Kaczynski JR and Singh RN (2013) An intronic structure enabled by a long-distance interaction serves as a novel target for splicing correction in spinal muscular atrophy. Nucleic Acids Research, 41, 8144-8165. PubMed, Pdf, Slide Presentation, Google citations
Singh NN, Joonbae Seo, Sarah J Rahn and Singh RN (2012) A multi-exon-skipping detection assay reveals surprising diversity of splice isoforms of spinal muscular atrophy genes. PLOS ONE, 7, e49595. PubMed, Pdf, Google citations
Singh NN, Seo J, Ottesen EW, Shshimorova M, Bhattacharya D and Singh RN (2011) TIA1 prevents skipping of a critical exon associated with spinal muscular atrophy. Molecular and Cellular Biology, 31, 935-954. PubMed, pdf, Google citations
Singh NN, Hollinger K, Bhattacharya D and Singh RN (2010) Antisense microwalk reveals critical role of an intronic position linked to a unique long-distance interaction in pre-mRNA splicing. RNA, 16, 1167-1181. PubMed, pdf, Google citations
Singh NN, Shishimorova M, Cao LC, Gangwani L and Singh RN (2009) A short antisense oligonucleotide masking a unique intronic motif prevents skipping of a critical exon in spinal muscular atrophy. RNA Biology, 6, 341-350. PubMed, pdf, Google citations
Papp LV, Wang J, Kennedy D, Boucher D, Zhang Y, Gladyshev VN, Singh RN and Khanna KK (2008) Functional characterization of alternatively spliced human SECISBP2 transcript variants. Nucleic Acids Research, 36, 7192-206. PubMed, pdf, Google citations
Singh NN, Singh RN and Androphy EJ (2007) Modulating role of a RNA structure in skipping of a critical exon in the spinal muscular atrophy genes. Nucleic Acids Research, 35, 371-389. PubMed, pdf, Google citations
Singh NK, Singh NN, Androphy EJ and Singh RN (2006) Splicing of a Critical Exon of Survival Motor Neuron genes is regulated by a human-specific silencer element located in the last intron. Molecular and Cellular Biology, 26, 1333-1346. PubMed, pdf, Google citations
Singh NN, Androphy EJ and Singh RN (2004) In vivo selection reveals features of combinatorial control that defines a critical exon in the spinal muscular atrophy genes. RNA, 10, 1291-1305. PubMed, pdf, Google citations
Singh NN, Androphy EJ and Singh RN (2004) Regulation and regulatory activities of alternative splicing of the SMN genes. Critical Reviews in Eukaryotic Gene Expression, 14, 271-285. PubMed, Google citations
Singh NN, Androphy EJ and Singh RN. (2004) An extended inhibitory context causes skipping of exon 7 of SMN2 in spinal muscular atrophy. Biochemical and Biophysical Research Communications, 315, 381-388. PubMed, Google citations
Singh RN, Saldanha R, D’Souza LM and Lambowitz AM (2002) Binding of a group II intron-encoded reverse transcriptase/maturase to its high affinity intron RNA binding site involves sequence-specific recognition and autoregulates translation. Journal of Molecular Biology, 318, 287-303. PubMed, Google citations
Wank H, SanFilippo J, Singh RN, Matsuuara M and Lambowitz AM (1999) A reverse transcriptase/maturase promotes RNA splicing by binding at its own coding segment in a group II intron. Molecular Cell, 4. 239-250. PubMed, Google citations
Singh RN and Dreher TW (1998) Specific site selection in RNA resulting from a combination of nonspecific secondary structure and -CCR- boxes: initiation of minus strand synthesis by turnip yellow mosaic virus RNA-dependent RNA polymerase. RNA, 4, 1083-1095. PubMed, Google citations
Summer scholars (undergraduate and veterinary students) selected through various internship programs would learn one or more of the following techniques:
1. Blast analysis of alternative splicing of different genes using public data base
2. Isolation and processing of RNA from pathological samples (human and animal samples)
3. Design and perform PCR experiments to amplify alternatively spliced transcripts
4. Run agarose and polyacrylamide gel electrophoresis
5. Perform tissue culture experiments
6. Perform gene silencing experiments
7. Perform cloning and expression experiments
8. Perform protein isolation and purification
9. Perform immunological tests
10. Write and present scientific report
If you are interested in obtaining your Ph.D. in Singh laboratory, please apply to one or more of the following interdisciplinary graduate programs at Iowa State University:
Depending upon the availability of funds, each program selects a limited number of promising graduate students with the first-year stipend. First year students are given opportunity to rotate in three laboratories of their choice. If you are admitted to any of the above-mentioned programs and have interest in RNA Biology and/or genetic diseases, you are welcome to rotate in Singh laboratory. Singh laboratory has funds to support a limited number of talented Ph.D. candidates from the second year onward if students have demonstrated acceptable performance and creative potential during the rotation period. Please note that Singh laboratory does not accept students without a rotation. Should you have a question regarding any specific graduate program at Iowa State University, please contact the respective program coordinator through the specific weblink listed above.