Susana Brom Klanner

Ingeniería Genómica Investigador

Inv. Tit. B T.C. Definitivo

Semblanza

Name: Susana Brom Klanner (Associate Professor).

Academic history
Undergraduate (B Sc.): Basic Biomedical Research, U.N.A.M. 1980.
Isolation and characterization of mutations in the glnA region of the E. coli K12 chromosome.
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Masters (M Sc.): Basic Biomedical Research, National Autonomous University of Mexico, 1982. Characterization of mutations in the glnA region of the E. coli K12 chromosome

Ph.D.Basic Biomedical Research, National Autonomous University of Mexico, 1988.
Analisis of symbiotic plasmids in Rhizobium phaseoli.

Initial research position
Assistant professor, Nitrogen Fixation Research Center, National Autonomous University of Mexico, 1983- 1993

Research line
Rhizobium are gram negative bacteria, able to form a symbiotic relationship with the roots of leguminous plants. Specifically, Rhizobium etli interacts with the roots of Phaseolus vulgaris (beans). The genome of the R. etli type strain CFN42 consists of a chromosome and 6 plasmids, varying in size between 180 and 600 Kb. We are interested in:

1- Further analyzing the functions encoded on plasmids. Previously we have found that plasmid encoded information is required for functions such as optimal competitive capacity for nodulation, saprophytic growth, lipopolysaccharide production, and one of the plasmids even seems to contain information which is indispensable for survival.
2- Analyzing the different mechanisms that contribute to symbiotic plasmid transfer, and their regulation.
3- Search for the presence of site-specific recombination systems, similar to the one we found on R. etli CFN42 plasmids; on other Rhizobiacea.

This work will contribute to a better understanding of the role of plasmids in the rhizobial life cycle, through the knowledge of plasmid encoded functions, and of the mechanisms that contribute to the distribution of symbiotic plasmids and the elements and conditions that control these processes.

Contributions

My work has contributed to the description of associated functions in plasmids of Rhizobium. Also, we have found that different strains of Rhizobium etli, share the localization on plasmids of some specific characteristics, independent of their geographic origin. Rhizobium strains from belonging to other species do not share this trait, even if they are able to nodulate bean.
We have described the regulatory mechanism of the conjugative transfer of a cryptic plasmid from R. etli (p42a).
We have studied the transfer capacity of symbiotic plasmid of R. etli CFN42. We have found two different mechanisms, one of them involves the cointegration of the symbiotic with another plasmid through a site specific recombination system. The resolution of the cointegrates sometimes leads to the generation of new symbiotic plasmids.

Present research position

Associate professor, Center of Genomic Sciences, National Autonomous University of Mexico.

Teaching
Undergraduate: 11 courses
Masters: 10 courses
Ph.D.: 7 courses.

Distinctions
* Gabino Barreda medal, for undergraduate studies, National Autonomous University of Mexico, 1980.
* Honorific Mention in Undergraduate professional exam. National Autonomous University of Mexico, 1980.
Honorific Mention in Masters professional exam. National Autonomous University of Mexico, 1982.
* Gabino Barreda medal, for Ph.D. studies, National Autonomous University of Mexico, 1990.
* Sor Juana Inés de la Cruz medal for research contributions, 2005.

Ligas

OrcID
Scopus

Teléfono: (777) 3291691
Correo: sbrom@ccg.unam.mx

Publicaciones

AñoPublicaciónPMID
2017Cubillas, C., Miranda-Sánchez, F., González-Sánchez, A., Elizalde, J.P., Vinuesa, P., Brom, S. and García-de los Santos, A.. (2017). "A comprehensive phylogenetic analysis of copper transporting P1BATPases from bacteria of the Rhizobiales order uncovers multiplicity, diversity and novel taxonomic subtypes". MICROBIOLOGYOPEN. 6(4):e00452-. [doi:10.1002/mbo3.452]28217917
2017Alfredo Banuelos-Vazquez, Luis, Torres Tejerizo, Gonzalo and Brom, S.. (2017). "Regulation of conjugative transfer of plasmids and integrative conjugative elements". Plasmid. 91():82-89. [doi:10.1016/j.plasmid.2017.04.002]28438469
2016Hernández-Tamayo, R., Torres-Tejerizo, G., Brom, S. and Romero, D.. (2016). "Site-specific bacterial chromosome engineering mediated by IntA integrase from Rhizobium etli". Bmc Microbiology. 16(1):133-133. [doi:10.1186/s12866-016-0755-y]27357704
2015Torres Tejerizo, G., Bañuelos, L.A., Cervantes, L., Gaytán, P., Pistorio, M., Romero, D. and Brom, S.. (2015). "Development of molecular tools to monitor conjugative transfer in Rhizobia". JOURNAL OF MICROBIOLOGICAL METHODS. 117():155-163. [doi:10.1016/j.mimet.2015.08.005]26272377
2015López-Fuentes E, Torres-Tejerizo G, Cervantes L and Brom, S.. (2015). "Genes encoding conserved hypothetical proteins localized in the conjugative transfer region of plasmid pRet42a from Rhizobium etli CFN42 participate in modulating transfer and affect conjugation from different donors". Frontiers in Microbiology. 5():793-793. [doi:10.3389/fmicb.2014.00793]25642223
2014Brom, S., Pistorio, M., Romero, D. and Torres-Tejerizo, G.. (2014). "Boundaries for conjugative transfer of rhizobial plasmids: Restraining and releasing factors". Plasticity In Plant-Growth-Promoting And Phytopathogenic Bacteria. 9781461492030():43-54. [doi:10.1007/978-1-4614-9203-0_3]
2014Tejerizo, G.T., Pistorio, M., Althabegoiti, M.J., Cervantes de la Luz, Laura, Wibberg, D., Schluter, A., Puhler, A., Lagares, A., Romero, D. and Brom, S.. (2014). "Rhizobial plasmid pLPU83a is able to switch between different transfer machineries depending on its genomic background". Fems Microbiology Ecology. 88(3):565-578. [doi:10.1111/1574-6941.12325]24646299
2013Hernández Tamayo, Rogelio, Sohlenkamp, C., Puente, J.L., Brom, S. and Romero, D.. (2013). "Characterization of IntA, a bidirectional site-specific recombinase required for conjugative transfer of the symbiotic plasmid of Rhizobium etli CFN42". Journal Of Bacteriology. 195(20):4668-4677. [doi:10.1128/JB.00714-13]23935046
2012Tejerizo, G.T., Lozano, L, González, V., Bustos, P, Romero, D. and Brom, S.. (2012). "Draft genome sequence of the bean-nodulating Sinorhizobium fredii strain GR64". Journal Of Bacteriology. 194(24):6978-6978. [doi:10.1128/JB.01882-12]23209231
2011Cervantes de la Luz, Laura, Bustos Arcos, Virginia Patricia, Girard, L., Santamaria Gutiérrez, Rosa Isela, Dávila Ramos, José Guillermo, Vinuesa, P., Romero, D. and Brom, S.. (2011). "The conjugative plasmid of a bean-nodulating Sinorhizobium fredii strain is assembled from sequences of two Rhizobium plasmids and the chromosome of a Sinorhizobium strain". Bmc Microbiology. 11(1):1-11. [doi:10.1186/1471-2180-11-149]21702991
2011Landeta Escamilla, Cristina, Dávalos Rodríguez, Araceli Elvira, Cevallos, M.A., Geiger, O., Brom, S. and Romero, D.. (2011). "Plasmids with a chromosome-like role in Rhizobia". Journal Of Bacteriology. 193(6):1317-1326. [doi:10.1128/JB.01184-10]21217003
2008Sepulveda, E., Perez-Mendoza, D., Ramirez-Romero, M. A., Soto, M. J., López-Lara, I.M.,, Geiger, O., Sanjuan, J., Brom, S. and Romero, D.. (2008). "Modulation of conjugative activity of rhizobial symbiotic plasmids by repression and transcriptional interference". FEBS JOURNAL. 275(1):49-49.
2008Sepulveda, Edgardo, Perez-Mendoza, Daniel, Ramirez-Romero, Miguel A., Soto, Maria J., López-Lara, I.M.,, Geiger, O., Sanjuan, Juan, Brom, S. and Romero, D.. (2008). "Transcriptional interference and repression modulate the conjugative ability of the symbiotic plasmid of Rhizobium etli". Journal Of Bacteriology. 190(12):4189-4197. [doi:10.1128/JB.00041-08]18424522
2008García-de los Santos, A., Lopez, Erika, Cubillas, Ciro A., Noel, K. Dale, Brom, S. and Romero, D.. (2008). "Requirement of a plasmid-encoded catalase for survival of Rhizobium etli CFN42 in a polyphenol-rich environment". Applied And Environmental Microbiology. 74(8):2398-2403. [doi:10.1128/AEM.02457-07]18310436
2007Brom, S., García-de los Santos, A. and Romero, Laura Cervantes David. (2007). "Conjugative transfer of Rhizobium plasmids.". Plasmid. 57(2):220-220.
2007Romero, D., García-de los Santos, A. and Brom, S.. (2007). "Essential plasmids in Rhizobium.". Plasmid. 57(2):227-227.
2007Sepulveda, Edgardo, Perez-Mendoza, Daniel, Munoz, Socorro, Ramirez-Romero, Miguel A., Soto, Maria Jose, Cervantes, Laura, Herrera-Cervera, Jose A., López-Lara, I.M.,, Geiger, O., Sanuan, Juan, Brom, S. and Romero, D.. (2007). "Regulation of conjugal transfer of the Rhizobium etli Sym plasmid.". Plasmid. 57(2):220-221.
2005Perez-Mendoza, D, Sepulveda, E, Pando, V, Munoz, S, Nogales, J, Olivares, J, Soto, MJ, Herrera-Cervera, JA, Romero, D., Brom, S. and Sanjuan, J. (2005). "Identification of the rctA gene, which is required for repression of conjugative transfer of rhizobial symbiotic megaplasmids". Journal Of Bacteriology. 187(21):7341-7350. [doi:10.1128/JB.187.21.7341-7350.2005]16237017
2004Brom, S., Girard, L., Tun Garrido, Cristina Soleda, García-de los Santos, A., Bustos Arcos, Virginia Patricia, González, V. and Romero, D.. (2004). "Transfer of the symbiotic plasmid of Rhizobium etli CFN42 requires cointegration with p42a, which may be mediated by site-specific recombination". Journal Of Bacteriology. 186(22):7538-7548. [doi:10.1128/JB.186.22.7538-7548.2004]15516565
2004Sepulveda, Edgardo, Perez-Mendoza, Daniel, Munoz, Socorro, Ramirez-Romero, Miguel A., Soto, Maria Jose, Cervantes, Laura, Herrera-Cervera, Jose A., López-Lara, I.M.,, Geiger, O., Sanuan, Juan, Brom, S. and Romero, D.. (2004). "Identification of functional mob regions in Rhizobium etli: Evidence for self-transmissibility of the symbiotic plasmid pRetCFN42d". Journal Of Bacteriology. 186(17):5753-5761. [doi:10.1128/JB.186.17.5753-5761.2004]15317780
2003Vargas, MD, Encarnacion, S, Davalos, A, Reyes-Perez, A, Mora, Y, García-de los Santos, A., Brom, S. and Mora, J.. (2003). "Only one catalase, katG, is detectable in Rhizobium etli, and is encoded along with the regulator OxyR on a plasmid replicon". MICROBIOLOGY-SGM. 149(5):1165-1176. [doi:10.1099/mic.0.25909-0]12724378
2003Tun-Garrido, C, Bustos, P, González, V. and Brom, S.. (2003). "Conjugative transfer of p42a from Rhizobium etli CFN42, which is required for mobilization of the symbiotic plasmid, is regulated by quorum sensing". Journal Of Bacteriology. 185(5):1681-1692. [doi:10.1128/JB.185.5.1681-1692.2003]12591886
2002Cevallos, M.A., Porta, H, Izquierdo, J, Tun-Garrido, C, Garcia-de-los-Santos, A, Davila, G and Brom, S.. (2002). "Rhizobium etli CFN42 contains at least three plasmids of the repABC family: A structural and evolutionary analysis". Plasmid. 48(2):104-116. [doi:10.1016/S0147-619X(02)00119-1]12383728
2002García-de los Santos, A., Morales, A, Baldoma, L, Clark, SRD, Brom, S., Yost, CK, Hernandez-Lucas, I, Aguilar, J and Hynes, MF. (2002). "The glcB locus of Rhizobium leguminosarum VF39 encodes an arabinose-inducible malate synthase". Canadian Journal Of Microbiology. 48(10):922-932. [doi:10.1139/w02-091]12489782
2002Brom, S., Girard, L., García-de los Santos, A., Sanjuan-Pinilla, J.M., Olivares, J. and Sanjuan, J.. (2002). "Conservation of plasmid-encoded traits among bean-nodulating Rhizobium species". Applied And Environmental Microbiology. 68(5):2555-2561. [doi:10.1128/AEM.68.5.2555-2561.2002]11976134
2000Girard, L., Brom, S., Dávalos Rodríguez, Araceli Elvira, López, O., Soberón Chávez, Mario and Romero, D.. (2000). "Differential regulation of fixN-reiterated genes in Rhizobium etli by a novel fixL-fixK cascade". Molecular Plant-Microbe Interactions. 13(12):1283-1292. [doi:10.1094/MPMI.2000.13.12.1283]11106020
2000Brom, S., García-de los Santos, A., Cervantes, L, Palacios, R and Romero, D.. (2000). "In Rhizobium etli symbiotic plasmid transfer, nodulation competitivity and cellular growth require interaction among different replicons". Plasmid. 44(1):34-43. [doi:10.1006/plas.2000.1469]10873525
1999Brom, S. and Romero, D.. (1999). "Plasmid biology 98: international symposium on plasmid biology". Plasmid. 41(2):141-177. 10087219
1997García-de los Santos, A. and Brom, S.. (1997). "Characterization of two plasmid-borne lps beta loci of Rhizobium etli required for lipopolysaccharide synthesis and for optimal interaction with plants". Molecular Plant-Microbe Interactions. 10(7):891-902. [doi:10.1094/MPMI.1997.10.7.891]9304861
1996Santos, AGD, Brom, S. and Romero, D.. (1996). "Rhizobium plasmids in bacteria-legume interactions". World Journal Of Microbiology & Biotechnology. 12(2):119-125. [doi:10.1007/BF00364676]24415159
1995Romero, D., MARTINEZSALAZAR, J, Girard, L., Brom, S., DAVILA, G, PALACIOS, R, FLORES, M and RODRIGUEZ, C. (1995). "Discrete amplifiable regions (amplicons) in the symbiotic plasmid of Rhizobium etli CFN42". Journal Of Bacteriology. 177(4):973-980. [doi:10.1128/jb.177.4.973-980.1995]7860608
1993Flores López, Margarita, Brom, S., Stepkowsky, Tomász, Girard, L., Dávila Ramos, José Guillermo, Romero, D. and Palacios de la Lama, Rafael. (1993). "Gene amplification in Rhizobium: Identification and in vivo cloning of discrete amplifiable DNA regions (amplicons) from Rhizobium leguminosarum biovar phaseoli". PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 90(11):4932-4936. [doi:10.1073/pnas.90.11.4932]8506337
1992Brom, S., García-de los Santos, A., STEPKOWSKI, T, FLORES, M, DAVILA, G, Romero, D. and PALACIOS, R. (1992). "DIFFERENT PLASMIDS OF Rhizobium-leguminosarum BV phaseoli ARE REQUIRED FOR OPTIMAL SYMBIOTIC PERFORMANCE". Journal Of Bacteriology. 174(16):5183-5189. [doi:10.1128/jb.174.16.5183-5189.1992]1644746
1991Girard, L., FLORES, M, Brom, S., Romero, D., PALACIOS, R and DAVILA, G. (1991). "Structural complexity of the symbiotic plasmid of Rhizobium leguminosarum bv. phaseoli". Journal Of Bacteriology. 173(8):2411-2419. [doi:10.1128/jb.173.8.2411-2419.1991]2013564
1991Romero, D., Brom, S., MARTINEZSALAZAR, J, Girard, L., PALACIOS, R and DAVILA, G. (1991). "Amplification and deletion of a nod-nif region in the symbiotic plasmid of Rhizobium phaseoli". Journal Of Bacteriology. 173(8):2435-2441. [doi:10.1128/jb.173.8.2435-2441.1991]2013567
1991Brom, S., García-de los Santos, A., Girard, L., DAVILA, G, PALACIOS, R and Romero, D.. (1991). "High-frequency rearrangements in Rhizobium leguminosarum bv. phaseoli plasmids". Journal Of Bacteriology. 173(3):1344-1346. [doi:10.1128/jb.173.3.1344-1346.1991]1991727
1988Brom, S., Martínez-Romero, E., DAVILA, G and PALACIOS, R. (1988). "NARROW-HOST-RANGE AND BROAD-HOST-RANGE SYMBIOTIC PLASMIDS OF Rhizobium SPP STRAINS THAT NODULATE Phaseolus-VULGARIS". Applied And Environmental Microbiology. 54(5):1280-1283. 16347637
1988Martínez-Romero, E., FLORES, M, Brom, S., Romero, D., DAVILA, G and PALACIOS, R. (1988). "Rhizobium phaseoli: A molecular genetics view". PLANT AND SOIL. 108(1):179-184. [doi:10.1007/BF02370113]
1987FLORES, M, González, V., Brom, S., Martínez-Romero, E., PINERO, D, Romero, D., DAVILA, G and PALACIOS, R. (1987). "Reiterated DNA sequences in Rhizobium and Agrobacterium spp.". Journal Of Bacteriology. 169(12):5782-5788. [doi:10.1128/jb.169.12.5782-5788.1987]3450286
1983DAVILA, G, Brom, S., MORA, Y, PALACIOS, R and Mora, J.. (1983). "GENETIC AND BIOCHEMICAL-CHARACTERIZATION OF GLUTAMINE-SYNTHETASE FROM NEUROSPORA-CRASSA GLUTAMINE AUXOTROPHS AND THEIR REVERTANTS". Journal Of Bacteriology. 156(3):993-1000. 6139363