Abstract
The production of biogas (methane) by an anaerobic digestion is an important facet to renewable energy, but is subject to instability due to the sensitivity of strictly anaerobic methanogenic archaea (methanogens) to environmental perturbations, such as oxygen. An understanding of the oxidant-sensing mechanisms used by methanogens may lead to the development of more oxidant tolerant (i.e., stable) methanogen strains. MsvR is a redox-sensitive transcriptional regulator that is found exclusively in methanogens. We show here that oxidation of MsvR from Methanosarcina acetivorans (MaMsvR) with hydrogen peroxide oxidizes cysteine thiols, which inactivates MaMsvR binding to its own promoter (P msvR ). Incubation of oxidized MaMsvR with the M. acetivorans thioredoxin system (NADPH, MaTrxR, and MaTrx7) results in reduction of the cysteines back to thiols and activation of P msvR binding. These data confirm that cysteines are critical for the thiol-disulfide regulation of P msvR binding by MaMsvR and support a role for the M. acetivorans thioredoxin system in the in vivo activation of MaMsvR. The results support the feasibility of using MaMsvR and P msvR , along with the Methanosarcina genetic system, to design methanogen strains with oxidant-regulated gene expression systems, which may aid in stabilizing anaerobic digestion.
References
Angel R, Claus P, Conrad R (2012) Methanogenic archaea are globally ubiquitous in aerated soils and become active under wet anoxic conditions. ISME J 6(4):847–862. doi:10.1038/ismej.2011.141
Angel R, Matthies D, Conrad R (2011) Activation of methanogenesis in arid biological soil crusts despite the presence of oxygen. PLoS One 6(5):e20453. doi:10.1371/journal.pone.0020453
Cremers CM, Jakob U (2013) Oxidant sensing by reversible disulfide bond formation. J Biol Chem 288(37):26489–26496. doi:10.1074/jbc.R113.462929
De Vrieze J, Hennebel T, Boon N, Verstraete W (2012) Methanosarcina: the rediscovered methanogen for heavy duty biomethanation. Bioresour Technol 112:1–9. doi:10.1016/j.biortech.2012.02.079
Deppenmeier U, Johann A, Hartsch T, Merkl R, Schmitz RA, Martinez-Arias R, Henne A, Wiezer A, Baumer S, Jacobi C, Bruggemann H, Lienard T, Christmann A, Bomeke M, Steckel S, Bhattacharyya A, Lykidis A, Overbeek R, Klenk HP, Gunsalus RP, Fritz HJ, Gottschalk G (2002) The genome of Methanosarcina mazei: evidence for lateral gene transfer between bacteria and archaea. J Mol Microbiol Biotechnol 4(4):453–461
Dubbs JM, Mongkolsuk S (2012) Peroxide-sensing transcriptional regulators in bacteria. J Bacteriol 194(20):5495–5503. doi:10.1128/JB.00304-12
Erkel C, Kube M, Reinhardt R, Liesack W (2006) Genome of rice cluster I archaea—the key methane producers in the rice rhizosphere. Science 313(5785):370–372
Fahey RC (2001) Novel thiols of prokaryotes. Annu Rev Microbiol 55:333–356. doi:10.1146/annurev.micro.55.1.333
Ferry JG (2008) Acetate-based methane production. In: Wall J, Harwood CS, Demain A (eds) Bioenergy. ASM press, Washington, pp 155–170
Fetzer S, Bak F, Conrad R (1993) Sensitivity of methanogenic bacteria from paddy soil to oxygen and desiccation. FEMS Microbiol Ecol 12:107–115
Galagan JE, Nusbaum C, Roy A, Endrizzi MG, Macdonald P, FitzHugh W, Calvo S, Engels R, Smirnov S, Atnoor D, Brown A, Allen N, Naylor J, Stange-Thomann N, DeArellano K, Johnson R, Linton L, McEwan P, McKernan K, Talamas J, Tirrell A, Ye W, Zimmer A, Barber RD, Cann I, Graham DE, Grahame DA, Guss AM, Hedderich R, Ingram-Smith C, Kuettner HC, Krzycki JA, Leigh JA, Li W, Liu J, Mukhopadhyay B, Reeve JN, Smith K, Springer TA, Umayam LA, White O, White RH, Conway de Macario E, Ferry JG, Jarrell KF, Jing H, Macario AJ, Paulsen I, Pritchett M, Sowers KR, Swanson RV, Zinder SH, Lander E, Metcalf WW, Birren B (2002) The genome of Methanosarcina acetivorans reveals extensive metabolic and physiological diversity. Genome Res 12(4):532–542
Guss AM, Rother M, Zhang JK, Kulkarni G, Metcalf WW (2008) New methods for tightly regulated gene expression and highly efficient chromosomal integration of cloned genes for Methanosarcina species. Archaea 2(3):193–203
Imlay JA (2002) How oxygen damages microbes: oxygen tolerance and obligate anaerobiosis. Adv Microb Physiol 46:111–153
Imlay JA (2006) Iron-sulphur clusters and the problem with oxygen. Mol Microbiol 59(4):1073–1082
Isom CE, Turner JL, Lessner DJ, Karr EA (2013) Redox-sensitive DNA binding by homodimeric Methanosarcina acetivorans MsvR is modulated by cysteine residues. BMC Microbiol 13:163. doi:10.1186/1471-2180-13-163
Jennings ME, Schaff CW, Horne AJ, Lessner FH, Lessner DJ (2014) Expression of a bacterial catalase in a strictly anaerobic methanogen significantly increases tolerance to hydrogen peroxide but not oxygen. Microbiology 160(Pt 2):270–278. doi:10.1099/mic.0.070763-0
Karr EA (2010) The methanogen-specific transcription factor MsvR regulates the fpaA-rlp-rub oxidative stress operon adjacent to msvR in Methanothermobacter thermautotrophicus. J Bacteriol 192(22):5914–5922. doi:10.1128/JB.00816-10
Kiener A, Leisinger T (1983) Oxygen sensitivity of methanogenic bacteria. System Appl Microbiol 4:305–312
Maeder DL, Anderson I, Brettin TS, Bruce DC, Gilna P, Han CS, Lapidus A, Metcalf WW, Saunders E, Tapia R, Sowers KR (2006) The Methanosarcina barkeri genome: comparative analysis with Methanosarcina acetivorans and Methanosarcina mazei reveals extensive rearrangement within methanosarcinal genomes. J Bacteriol 188(22):7922–7931. doi:10.1128/JB.00810-06
McCarver AC, Lessner DJ (2014) Molecular characterization of the thioredoxin system from Methanosarcina acetivorans. FEBS J 281(20):4598–4611. doi:10.1111/febs.12964
McFarlan SC, Terrell CA, Hogenkamp HP (1992) The purification, characterization, and primary structure of a small redox protein from Methanobacterium thermoautotrophicum, an archaebacterium. J Biol Chem 267(15):10561–10569
Meyer Y, Buchanan BB, Vignols F, Reichheld JP (2009) Thioredoxins and glutaredoxins: unifying elements in redox biology. Annu Rev Genet 43:335–367. doi:10.1146/annurev-genet-102108-134201
Riddles PW, Blakeley RL, Zerner B (1983) Reassessment of Ellman’s reagent. Methods Enzymol 91:49–60
Susanti D, Wong JH, Vensel WH, Loganathan U, DeSantis R, Schmitz RA, Balsera M, Buchanan BB, Mukhopadhyay B (2014) Thioredoxin targets fundamental processes in a methane-producing archaeon, Methanocaldococcus jannaschii. Proc Natl Acad Sci USA 111(7):2608–2613. doi:10.1073/pnas.1324240111
Thauer RK, Kaster AK, Seedorf H, Buckel W, Hedderich R (2008) Methanogenic archaea: ecologically relevant differences in energy conservation. Nat Rev Microbiol 6(8):579–591. doi:10.1038/nrmicro1931
Zheng M, Aslund F, Storz G (1998) Activation of the OxyR transcription factor by reversible disulfide bond formation. Science 279(5357):1718–1721
Acknowledgements
This work was supported in part by grant number P20 GM103640 (EAK) and P30 GM103450 (DJL) from the National Institute of General Medical Sciences of the National Institutes of Health, NSF grant number MCB1121292 (DJL), NASA Exobiology grant number NNX12AR60G (DJL), and the Arkansas Biosciences Institute (DJL), the major research component of the Arkansas Tobacco Settlement Proceeds Act of 2000.
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Sheehan, R., McCarver, A.C., Isom, C.E. et al. The Methanosarcina acetivorans thioredoxin system activates DNA binding of the redox-sensitive transcriptional regulator MsvR. J Ind Microbiol Biotechnol 42, 965–969 (2015). https://doi.org/10.1007/s10295-015-1592-y
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DOI: https://doi.org/10.1007/s10295-015-1592-y