1. Holert J°, Wilhelm R, Henker J, Reinker CA, Müller FM, Philipp B. 2025. Chicken manure as a sustainable bile acid source for biotechnological applications. Microbial Biotechnology. https://doi.org/10.1111/1751-7915.70178

2. Holert J°, Borker A, Nübel LL, Daniel R, Poehlein A, Philipp B. 2024. Bacteria use a catabolic patchwork pathway of apparently recent origin for degradation of the synthetic buffer compound TRIS. The ISME Journal. https://doi.org/10.1093/ismejo/wrad023

3. Weckerle T, Ewald H, Guth P, Knorr K, Philipp B, Holert J°. 2023. Biogas digestate as a sustainable phytosterol source for biotechnological cascade valorization. Microbial Biotechnology. https://doi.org/10.1111/1751-7915.14174

4. Bakenhus I, Jongsma R, Michler-Kozma D, Hölscher L, Gabel F, Holert J, Philipp B. 2023. A domesticated photoautotrophic microbial community as a biofilm model system for analyzing the influence of plastic surfaces on invertebrate grazers in limnic environments. Frontiers in Microbiology. https://doi.org/10.3389/fmicb.2023.1238913

5. Sugden S, Holert J, Cardenas E, Mohn WW, Stein LY. 2022. Microbiome of the freshwater sponge Ephydatia muelleri shares compositional and functional similarities with those of marine sponges. The ISME Journal. https://doi.org/10.1038/s41396-022-01296-7

6. Feller FM*, Holert J*, Yücel O, Philipp B. 2021. Degradation of Bile Acids by Soil and Water Bacteria. Microorganisms. https://doi.org/10.3390/microorganisms9081759

7. Feller FM, Wöhlbrand L, Holert J, Schnaars V, Elsner L, Mohn WW, Rabus R, Philipp B. 2021. Proteome, bioinformatic, and functional analyses reveal a distinct and conserved metabolic pathway for bile salt degradation in the Sphingomonadaceae. Applied and Environmental Microbiology. https://doi.org/10.1128/AEM.00987-21

8. Holert J, Brown K, Hashimi A, Eltis LD, Mohn WW. 2020. Steryl ester formation and accumulation in steroid-degrading bacteria. Applied and Environmental Microbiology. https://doi.org/10.1128/AEM.02353-19

9. Yücel O, Holert J, Ludwig KC, Thierbach S, Philipp B. 2018. A novel steroid-coenzyme a ligase from Novosphingobium sp. strain Chol11 is essential for an alternative degradation pathway for bile salts. Applied and Environmental Microbiology. https://doi.org/10.1128/AEM.01492-17

10. Holert J, Cardenas E, Bergstrand LH, Zaikova E, Hahn AS, Hallam SJ, Mohn WW. 2018. Metagenomes reveal global distribution of bacterial steroid catabolism in natural, engineered, and host environments. mBio. https://doi.org/10.1128/mbio.02345-17

11. Holert J, Yücel O, Jagmann N, Prestel A, Möller HM, Philipp B. 2016. Identification of bypass reactions leading to the formation of one central steroid degradation intermediate in metabolism of different bile salts in Pseudomonas sp. strain Chol1. Environmental Microbiology. https://doi.org/10.1111/1462-2920.13192

12. Bergstrand LH, Cardenas E*, Holert J*, Van Hamme JD, Mohn WW. 2016. Delineation of steroid-degrading microorganisms through comparative genomic analysis. mBio. https://doi.org/10.1128/mbio.00166-16

13. Barrientos Á, Merino E, Casabon I, Rodríguez J, Crowe AM, Holert J, Philipp B, Eltis LD, Olivera ER, Luengo JM, 2015. Functional analyses of three acyl-CoA synthetases involved in bile acid degradation in Pseudomonas putida DOC21. Environmental Microbiology. https://doi.org/10.1111/1462-2920.12395

14. Holert J*, Yücel O*, Suvekbala V, Kulić Ž, Möller H, Philipp B. 2014. Evidence of distinct pathways for bacterial degradation of the steroid compound cholate suggests the potential for metabolic interactions by interspecies cross-feeding. Environmental Microbiology. https://doi.org/10.1111/1462-2920.12407

15. Holert J, Kulić Ž, Yücel O, Suvekbala V, Suter MJ, Möller HM, Philipp B. 2013. Degradation of the acyl side chain of the steroid compound cholate in Pseudomonas sp. strain Chol1 proceeds via an aldehyde intermediate. Journal of Bacteriology. https://doi.org/10.1128/jb.01961-12

16. Holert J, Jagmann N, Philipp B. 2013. The essential function of genes for a hydratase and an aldehyde dehydrogenase for growth of Pseudomonas sp. strain Chol1 with the steroid compound cholate indicates an aldolytic reaction step for deacetylation of the side chain. Journal of Bacteriology. https://doi.org/10.1128/jb.00410-13

17. Holert J, Alam I, Larsen M, Antunes A, Bajic VB, Stingl U, Philipp B. 2013. Genome sequence of Pseudomonas sp. strain Chol1, a model organism for the degradation of bile salts and other steroid compounds. Genome announcements. https://doi.org/10.1128/genomea.00014-12

18. Holert J, Hahnke S, Cypionka H. 2011. Influence of light and anoxia on chemiosmotic energy conservation in Dinoroseobacter shibae. Environmental Microbiology Reports. https://doi.org/10.1111/j.1758-2229.2010.00199.x

19. Birkenmaier A, Holert J, Erdbrink H, Möller HM, Friemel A, Schoenenberger R, Suter MJ, Klebensberger J, Philipp B. 2007. Biochemical and genetic investigation of initial reactions in aerobic degradation of the bile acid cholate in Pseudomonas sp. strain Chol1. Journal of Bacteriology. https://doi.org/10.1128/jb.00665-07

° corresponding author

* these authors contributed equally

Theses:

Holert J. 2013. Bacterial degradation of steroid compounds: elucidation of metabolic pathways and cell-cell interactions. PHD Thesis, print

Holert J. 2009. Light- and respiration-dependent ATP conservation in Dinoroseobacter shibae. Master Thesis, print

Holert J. 2005. Charakterisierung einer Mutante von Pseudomonas stutzeri Stamm Chol1 mit einem Defekt im Abbauweg für die Gallensäure Cholat. Bachelorarbeit, print