Publications

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Publications:

1. Kumar, S., Agyeman-Duah, E., & Ujor, V. C. (2025). Rational engineering of Pseudomonas putida DSM 6125 for dedicated catabolic detoxification of furfural and 5-(hydroxymethyl) furfural. Biomass and Bioenergy, 197, 107839.

2. Gangwar, B., Kumar, S., Kumar, P., Pal, A., & Darokar, M. P. (2025). A Mechanistic Insight into the Anti-Staphylococcal Mode of Action of (+)-Usnic Acid and Its Synergy with Norfloxacin Against Methicillin-Resistant Staphylococcus aureus. Biomolecules, 15(6), 750.

3. Kellermann, R., Kumar, S., Gates, A. J., Bakken, L., Spiro, S., & Bergaust, L. (2025). The Flavohemoglobin Hmp and Nitric Oxide Reductase Restrict Initial nir Expression in the Bet‐Hedging Denitrifier Paracoccus denitrificans by Curtailing Hypoxic NO Signalling. Environmental Microbiology, 27(3), e70079.

4. Awaga-Cromwell, M. M., Kumar, S., Truong, H. M., Agyeman-Duah, E., Okonkwo, C. C., & Ujor, V. C. (2025). Dysregulated biosynthesis and hydrolysis of cyclic-di-adenosine monophosphate impedes sporulation and butanol and acetone production in Clostridium beijerinckii NCIMB 8052. Frontiers in Bioengineering and Biotechnology, 13, 1547226.

5. Kumar, S., Agyeman-Duah, E., Awaga-Cromwell, M. M., & Ujor, V. C. (2024). Transcriptomic characterization of recombinant Clostridium beijerinckii NCIMB 8052 expressing methylglyoxal synthase and glyoxal reductase from Clostridium pasteurianum ATCC 6013. Applied and Environmental Microbiology, 90(10), e01012-24.

6. Agyeman-Duah, E., Kumar, S., & Ujor, V. C. (2024). Screening recombinant and wildtype solventogenic Clostridium species for in vivo transformation of methylglyoxal and acetol to 1, 2-propanediol. Process Biochemistry, 144, 278-286.

7. Kumar, S., Agyeman-Duah, E., & Ujor, V. C. (2023). Whole-genome sequence and fermentation characteristics of Enterobacter hormaechei UW0SKVC1: A promising candidate for detoxification of lignocellulosic biomass hydrolysates and production of value-added chemicals. Bioengineering, 10(9), 1090.

8. Gangwar, B., Kumar, S., & Darokar, M. P. (2023). Antioxidant phytochemicals as novel therapeutic strategies against drug-resistant bacteria. Importance of oxidative stress and antioxidant system in health and disease.

9. Perez-Rueda, E., Schellhorn, H. E., & Kumar, S. (2023). Role of transcription factors and sigma factors in bacterial stress physiology. Frontiers in Microbiology, 14, 1291172.

10. Kumar, S., & Ujor, V. C. (2022). Complete genome sequence of Paenibacillus polymyxa DSM 365, a soil bacterium of agricultural and industrial importance. Microbiology Resource Announcements, 11(6), e00329-22.

11. Kumar, S., Posmanik, R., Spatari, S., & Ujor, V. C. (2022). Repurposing anaerobic digestate for economical biomanufacturing and water recovery. Applied Microbiology and Biotechnology, 106(4), 1419-1434.

12. Agyeman-Duah, E., Kumar, S., Gangwar, B., & Ujor, V. C. (2022). Glycerol utilization as a sole carbon source disrupts the membrane architecture and solventogenesis in Clostridium beijerinckii NCIMB 8052. Fermentation, 8(7), 339.

13. Gangwar, B., Kumar, S., & Darokar, M. P. (2022). UA: A Potential Natural Anti-Staphylococcal Agent. Ann. Clin. Pathol, 9, 1156.

14. Gangwar, B., Kumar, S., & Darokar, M. P. (2020). Glabridin averts biofilms formation in methicillin-resistant Staphylococcus aureus by modulation of the surfaceome. Frontiers in microbiology, 11, 1779.

15. Neupane, D. P., Kumar, S., & Yukl, E. T. (2018). Two ABC transporters and a periplasmic metallochaperone participate in zinc acquisition in Paracoccus denitrificans. Biochemistry, 58(2), 126-136.

16. Rai, A. K., Singh, S., Dwivedi, S. K., Srivastava, A., Pandey, P., Kumar, S., ... & Tripathi, A. K. (2018). Catalase expression in Azospirillum brasilense Sp7 Is regulated by a network consisting of OxyR and two RpoH paralogs and including an RpoE1→ RpoH5 regulatory cascade. Applied and Environmental Microbiology, 84(23), e01787-18.

17. Kumar, S., & Spiro, S. (2017). Environmental and genetic determinants of biofilm formation in Paracoccus denitrificans. Msphere, 2(5), 10-1128.

18. Rai, A. K., Dubey, A. P., Kumar, S., Dutta, D., Mishra, M. N., Singh, B. N., & Tripathi, A. K. (2016). Carotenoid biosynthetic pathways are regulated by a network of multiple cascades of alternative sigma factors in Azospirillum brasilense Sp7. Journal of Bacteriology, 198(21), 2955-2964.

19. Gupta, N., Gupta, A., Kumar, S., Mishra, R., Singh, C., & Tripathi, A. K. (2014). Cross-talk between cognate and noncognate RpoE sigma factors and Zn2+-binding anti-sigma factors regulates photooxidative stress response in Azospirillum brasilense. Antioxidants & Redox Signaling, 20(1), 42-59.

20. Gupta, N., Kumar, S., Mishra, M. N., & Tripathi, A. K. (2013). A constitutively expressed pair of rpoE2–chrR2 in Azospirillum brasilense Sp7 is required for survival under antibiotic and oxidative stress. Microbiology, 159(Pt_2), 205-218.

21. Kumar, S., Rai, A. K., Mishra, M. N., Shukla, M., Singh, P. K., & Tripathi, A. K. (2012). RpoH2 sigma factor controls the photooxidative stress response in a non-photosynthetic rhizobacterium, Azospirillum brasilense Sp7. Microbiology, 158(12), 2891-2902.

22. Kumar, S., Kateriya, S., Singh, V. S., Tanwar, M., Agarwal, S., Singh, H., ... & Tripathi, A. K. (2012). Bacteriophytochrome controls carotenoid-independent response to photodynamic stress in a non-photosynthetic rhizobacterium, Azospirillum brasilense Sp7. Scientific reports, 2(1), 872.

23. Mishra, M. N., Kumar, S., Gupta, N., Kaur, S., Gupta, A., & Tripathi, A. K. (2011). An extracytoplasmic function sigma factor cotranscribed with its cognate anti-sigma factor confers tolerance to NaCl, ethanol and methylene blue in Azospirillum brasilense Sp7. Microbiology, 157(4), 988-999.