Otto Geiger

Ecología Genómica Investigador

Inv. Tit. C T.C. Definitivo

Semblanza

Otto Geiger estudió biología en la Universidad de Hohenheim en Stuttgart, Alemania y después de estudiar a quinoproteínas y su grupo prostético piroloquinolina quinona en el Instituto de Microbiología, recibió su título de doctor con la distinción “summa cum laude” en 1987 en dicha Universidad. Como un becario Feodor Lynen financiado por la Fundación Alexander von Humboldt de Alemania hizo una estancia posdoctoral con Eugene P. Kennedy en Harvard Medical School, Boston, USA, trabajando sobre la biosíntesis de glucanos cíclicos en bacterias Gram-negativas. Subsecuentemente investigó, junto con Ben Lugtenberg y Herman Spaink, la biosíntesis de los oligosacáridos de lipoquitina, moléculas señal que causan la formación de nódulos en las raíces de sus plantas hospedaderas leguminosas” en la Universidad de Leiden, Holanda. Entre 1993 y 1999, el Dr. Geiger fue Investigador Lider en el Departamento de Biotecnología de la Universidad Técnica de Berlín donde hizo su habilitación (cualificado para cátedra universitaria) en 1997 para ser Docente de Bioquímica. Otto Geiger se integró al Centro de Ciencias Genómicas (anteriormente Centro de Investigación sobre Fijación de Nitrógeno) de la Universidad Nacional Autónoma de México (Cuernavaca) en 1999 y fue International Research Scholar (2002-2006) del Howard Hughes Medical Institute (HHMI). Actualmente, es profesor de la Licenciatura en Ciencias Genómicas, Investigador Titular C y Responsable del Grupo de Investigación “Interacciones entre Pro- y Eucariontes”. El grupo de investigación de Geiger descubrió tanto la vía de la fosfatidilcolina sintasa, cual es una de las vías principales para formar fosfatidilcolina (lecitina) en bacterias, como la vía de biosíntesis de los lípidos de ornitina, que son lípidos bioactivos ampliamente distribuidos en membranas bacterianas. Recientemente, descubrió varios mecanismos moleculares de remodelaje de lípidos, que ocurren en membranas de bacterias en respuesta a diferentes tipos de estrés. Actualmente está estudiando las funciones moleculares de la fosfatidilcolina en bacterias y la biosíntesis, transporte y función de esfingolípidos en bacterias. Además es editor para la revista BMC Microbiology y para el Handbook of Hydrocarbon and Lipid Microbiology. Es Investigador Nacional nivel III y pertenece al PRIDE con el nivel D.

Ligas

Scopus

Teléfono: (777) 3131697
Correo: otto@ccg.unam.mx

Publicaciones

AñoPublicaciónPMID
2018Lopez-Lara, I.M.,, Nogales, J., Pech-Canul, Á., Calatrava-Morales, N., Bernabéu-Roda, L.M., Durán, P., Cuéllar, V., Olivares, J., Alvarez, L., Palenzuela-Bretones, D., Romero, M., Heeb, S., Cámara, M., Geiger, O. and Soto, M.J.. (2018). "2-Tridecanone impacts surface-associated bacterial behaviours and hinders plant–bacteria interactions". Environmental Microbiology. 20(6):2049-2065. [doi:10.1111/1462-2920.14083]29488306
2017Lopez-Lara, I.M., and Geiger, O.. (2017). "Bacterial lipid diversity". Biochimica Et Biophysica Acta-Molecular And Cell Biology Of Lipids. 1862(11):1287-1299. [doi:10.1016/j.bbalip.2016.10.007]27760387
2017Vences-Guzman, M.A, Goetting-Minesky, M. Paula, Guan, Ziqiang, Castillo-Ramirez, S, America Cordoba-Castro, Luz, Lopez-Lara, I.M.,, Geiger, O., Sohlenkamp, C and Fenno, J. Christopher. (2017). "1,2-Diacylglycerol choline phosphotransferase catalyzes the final step in the unique Treponema denticola phosphatidylcholine biosynthesis pathway". Molecular Microbiology. 103(5):896-912. [doi:10.1111/mmi.13596]28009086
2016Sahonero-Canavesi, Diana X., Zavaleta-Pastor, Maritza, Martinez-Aguilar, Lourdes, Lopez-Lara, I.M., and Geiger, O.. (2016). "Defining substrate specificities for lipase and phospholipase candidates". JOVE-JOURNAL OF VISUALIZED EXPERIMENTS. 2016(117):e54613-. [doi:10.3791/54613]27911408
2016Degli Esposti, M., Geiger, O. and Martinez-Romero, E.. (2016). "Recent developments on bacterial evolution into eukaryotic cells". Evolutionary Biology: Convergent Evolution, Evolution Of Complex Traits, Concepts And Methods. ():187-202. [doi:10.1007/978-3-319-41324-2_12]
2015Aguilar, C., Flores, N., Riveros-McKay, F., Sahonero-Canavesi, D., Carmona, S.B., Geiger, O., Escalante, A. and Bolívar, F.. (2015). "Deletion of the 2-acyl-glycerophosphoethanolamine cycle improve glucose metabolism in Escherichia coli strains employed for overproduction of aromatic compounds". Microbial Cell Factories. 14(1):194-194. [doi:10.1186/s12934-015-0382-6]26627477
2015Sohlenkamp, C and Geiger, O.. (2015). "Bacterial membrane lipids: Diversity in structures and pathways". Fems Microbiology Reviews. 40(1):133-159. [doi:10.1093/femsre/fuv008]25862689
2015Sahonero-Canavesi, D.X., Sohlenkamp, C, Sandoval-Calderón, M., Lamsa, A., Pogliano, K., Lopez-Lara, I.M., and Geiger, O.. (2015). "Fatty acid-releasing activities in Sinorhizobium meliloti include unusual diacylglycerol lipase". Environmental Microbiology. 17(9):3391-3406. [doi:10.1111/1462-2920.12814]25711932
2015Escobedo-Hinojosa, W.I., Vences-Guzman, M.A, Schubotz, F., Sandoval-Calderón, M., Summons, R.E., Lopez-Lara, I.M.,, Geiger, O. and Sohlenkamp, C. (2015). "OlsG (Sinac-1600) Is an ornithine lipid N-Methyltransferase from the planctomycete Singulisphaera acidiphila". JOURNAL OF BIOLOGICAL CHEMISTRY. 290(24):15102-15111. [doi:10.1074/jbc.M115.639575]25925947
2015Vences-Guzman, M.A, Guan, Ziqiang, Itzel Escobedo-Hinojosa, Wendy, Roberto Bermudez-Barrientos, Jose, Geiger, O. and Sohlenkamp, C. (2015). "Discovery of a bifunctional acyltransferase responsible for ornithine lipid synthesis in Serratia Proteamaculans". Environmental Microbiology. 17(5):1487-1496. [doi:10.1111/1462-2920.12562]25040623
2013Geiger, O., Lopez-Lara, I.M., and Sohlenkamp, C. (2013). "Phosphatidylcholine biosynthesis and function in bacteria". Biochimica Et Biophysica Acta-Molecular And Cell Biology Of Lipids. 1831(3):503-513. [doi:10.1016/j.bbalip.2012.08.009]22922101
2013Vences-Guzman, M.A, Guan, Z.Q., Bermúdez Barrientos, José Roberto, Geiger, O. and Sohlenkamp, C. (2013). "Agrobacteria lacking ornithine lipids induce more rapid tumour formation". Environmental Microbiology. 15(3):895-906. [doi:10.1111/j.1462-2920.2012.02867.x]22958119
2012Vences-Guzman, M.A, Geiger, O. and Sohlenkamp, C. (2012). "Ornithine lipids and their structural modifications: From A to E and beyond". Fems Microbiology Letters. 335(1):1-10. [doi:10.1111/j.1574-6968.2012.02623.x]22724388
2012Solis Oviedo, Rosa Lidia, Martínez-Morales, F., Geiger, O. and Sohlenkamp, C. (2012). "Functional and topological analysis of phosphatidylcholine synthase from Sinorhizobium meliloti". Biochimica Et Biophysica Acta-Molecular And Cell Biology Of Lipids. 1821(4):573-581. [doi:10.1016/j.bbalip.2012.01.016]22333179
2012Higareda, M.F., Geiger, O., Mendoza, L. and Mendez-Sánchez, R.A.. (2012). "Evidence of codon usage in the nearest neighbor spacing distribution of bases in bacterial genomes". PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS. 391(4):1255-1269. [doi:10.1016/j.physa.2011.10.035]
2011Pech Canul, Angel De La Cruz, Nogales, J., Miranda-Molina, A., Álvarez, L., Geiger, O., Soto, M.J. and Lopez-Lara, I.M.,. (2011). "FadD is required for utilization of endogenous fatty acids released from membrane lipids". Journal Of Bacteriology. 193(22):6295-6304. [doi:10.1128/JB.05450-11]21926226
2011González Silva, Napoleón, Lopez-Lara, I.M.,, Reyes-Lamothe, R., Taylor, A.M., Sumpton, D., Thomas-Oates, J. and Geiger, O.. (2011). "The dioxygenase-encoding olsD gene from Burkholderia cenocepacia causes the hydroxylation of the amide-linked fatty acyl moiety of ornithine-containing membrane lipids". Biochemistry. 50(29):6396-6408. [doi:10.1021/bi200706v]21707055
2011Landeta Escamilla, Cristina, Dávalos Rodríguez, Araceli Elvira, Cevallos Gaos, Miguel Ángel Carlos, Geiger, O., Brom Klanner, Susana and Romero Camarena, David René. (2011). "Plasmids with a chromosome-like role in Rhizobia". Journal Of Bacteriology. 193(6):1317-1326. [doi:10.1128/JB.01184-10]21217003
2011Vences-Guzman, M.A, Guan, Z.Q., Ormeño Orrillo, Ernesto Aldo, González Silva, Napoleón, Lopez-Lara, I.M.,, Martínez Romero, María Esperanza, Geiger, O. and Sohlenkamp, C. (2011). "Hydroxylated ornithine lipids increase stress tolerance in Rhizobium tropici CIAT899". Molecular Microbiology. 79(6):1496-1514. [doi:10.1111/j.1365-2958.2011.07535.x]21205018
2010Ingram, Brian O., Sohlenkamp, C, Geiger, O. and Raetz, Christian R. H.. (2010). "Altered lipid A structures and polymyxin hypersensitivity of Rhizobium etli mutants lacking the lpxE and LpxF phosphatases". Biochimica Et Biophysica Acta-Molecular And Cell Biology Of Lipids. 1801(5):593-604. [doi:10.1016/j.bbalip.2010.02.001]20153447
2010Davila-Martinez, Yadira, Laura Ramos-Vega, Ana, Contreras-Martinez, Sandra, Encarnacion, Sergio, Geiger, O. and Lopez-Lara, I.M.,. (2010). "SMc01553 is the sixth acyl carrier protein in Sinorhizobium meliloti 1021". MICROBIOLOGY-SGM. 156(1):230-239. [doi:10.1099/mic.0.033480-0]19797355
2010Zavaleta-Pastor, Maritza, Sohlenkamp, C, Gao, Jun-Lian, Guan, Ziqiang, Zaheer, Rahat, Finan, Turlough M., Raetz, Christian R. H., Lopez-Lara, I.M., and Geiger, O.. (2010). "Sinorhizobium meliloti phospholipase C required for lipid remodeling during phosphorus limitation". PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. 107(1):302-307. [doi:10.1073/pnas.0912930107]20018679
2010Medeot, Daniela B., Sohlenkamp, C, Dardanelli, Marta S., Geiger, O., Garcia de Lema, Mirta and Lopez-Lara, I.M.,. (2010). "Phosphatidylcholine levels of peanut-nodulating Bradyrhizobium sp. SEMIA 6144 affect cell size and motility". Fems Microbiology Letters. 303(2):123-131. [doi:10.1111/j.1574-6968.2009.01873.x]20030724
2010Geiger, O., Sohlenkamp, C and Lopez-Lara, I.M.,. (2010). "Formation of bacterial membrane lipids: pathways, enzymes, reactions". Handbook of Hydrocarbon and Lipid Microbiology Hydrocarbons, Oils, and Lipids: Diversity, Properties and Formation. ():396-405.
2010Lopez-Lara, I.M., and Geiger, O.. (2010). "Formation of fatty acids". Handbook of Hydrocarbon and Lipid Microbiology Hydrocarbons, Oils, and Lipids: Diversity, Properties and Formation. ():385-394.
2010Geiger, O.. (2010). "Lipids and Legionella virulence". Handbook of Hydrocarbon and Lipid Microbiology Hydrocarbons, Oils, and Lipids: Diversity, Properties and Formation. ():3195-3202.
2010Geiger, O., Gonzalez-Silva, Napoleon, Lopez-Lara, I.M., and Sohlenkamp, C. (2010). "Amino acid-containing membrane lipids in bacteria". Progress In Lipid Research. 49(1):46-60. [doi:10.1016/j.plipres.2009.08.002]19703488
2009Sandoval-Calderon, Mario, Geiger, O., Guan, Ziqiang, Barona-Gomez, Francisco and Sohlenkamp, C. (2009). "A eukaryote-like cardiolipin synthase is present in Streptomyces coelicolor and in most actinobacteria". JOURNAL OF BIOLOGICAL CHEMISTRY. 284(26):17383-17390. [doi:10.1074/jbc.M109.006072]19439403
2009Laura Ramos-Vega, Ana, Davila-Martinez, Yadira, Sohlenkamp, C, Contreras-Martinez, Sandra, Encarnacion, Sergio, Geiger, O. and Lopez-Lara, I.M.,. (2009). "SMb20651 is another acyl carrier protein from Sinorhizobium meliloti". MICROBIOLOGY-SGM. 155(1):257-267. [doi:10.1099/mic.0.022079-0]19118366
2008Vences-Guzman, M.A, Geiger, O. and Sohlenkamp, C. (2008). "Sinorhizobium meliloti mutants deficient in phosphatidylserine decarboxylase accumulate phosphatidylserine and are strongly affected during symbiosis with Alfalfa". Journal Of Bacteriology. 190(20):6846-6856. [doi:10.1128/JB.00610-08]18708506
2008Sepulveda, Edgardo, Perez-Mendoza, Daniel, Ramirez-Romero, Miguel A., Soto, Maria J., Lopez-Lara, I.M.,, Geiger, O., Sanjuan, Juan, Brom, Susana and Romero, David. (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
2008Sepulveda, E., Perez-Mendoza, D., Ramirez-Romero, M. A., Soto, M. J., Lopez-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.
2008Conover, Gloria M., Martinez-Morales, Fernando, Heidtman, Matthew I., Luo, Zhao-Qing, Tang, May, Chen, Cui, Geiger, O. and Isberg, Ralph R.. (2008). "Phosphatidylcholine synthesis is required for optimal function of Legionella pneumophila virulence determinants". CELLULAR MICROBIOLOGY. 10(2):514-528. [doi:10.1111/j.1462-5822.2007.01066.x]17979985
2008Geiger, O., Lopez-Lara, I.M., and Sohlenkamp, C. (2008). "Altered formations of special eubacterial membrane lipids affect bacterial interactions with eukaryotic hosts". Current Plant Science and Biotechnology. Agriculture Biological Nitrogen Fixation, Sustainable Agriculture and the Environment. 42(0):245-246.
2008Hacker, Stephanie, Sohlenkamp, C, Aktas, Meriyem, Geiger, O. and Narberhaus, Franz. (2008). "Multiple phospholipid N-methyltransferases with distinct substrate specificities are encoded in Bradyrhizobium japonicum". Journal Of Bacteriology. 190(2):571-580. [doi:10.1128/JB.01423-07]17993534
2008Geiger, O., Lopez-Lara, I.M., and Sohlenkamp, C. (2008). "ALTERED FORMATIONS OF SPECIAL EUBACTERIAL MEMBRANE LIPIDS AFFECT BACTERIAL INTERACTIONS WITH EUKARYOTIC HOSTS". Biological Nitrogen Fixation: Towards Poverty Alleviation Through Sustainable Agriculture. 42():245-246.
2007Sohlenkamp, C, Galindo-Lagunas, Kanaan A., Guan, Ziqiang, Vinuesa, Pablo, Robinson, Sally, Thomas-Oates, Jane, Raetz, Christian R. H. and Geiger, O.. (2007). "The lipid lysyl-phosphatidylglycerol is present in membranes of Rhizobium tropici CIAT899 and confers increased resistance to polymyxin B under acidic growth conditions". Molecular Plant-Microbe Interactions. 20(11):1421-1430. [doi:10.1094/MPMI-20-11-1421]17977153
2007Sepulveda, Edgardo, Perez-Mendoza, Daniel, Munoz, Socorro, Ramirez-Romero, Miguel A., Soto, Maria Jose, Cervantes, Laura, Herrera-Cervera, Jose A., Lopez-Lara, I.M.,, Geiger, O., Sanuan, Juan, Brom, Susana and Romero, David. (2007). "Regulation of conjugal transfer of the Rhizobium etli Sym plasmid.". Plasmid. 57(2):220-221.
2007Medeot, D.B., Sohlenkamp, C, Geiger, O., García, M.B. and Lopez-Lara, I.M.,. (2007). "Phosphatidycholine fuction in rhizobial strains nodulating peanut: genes and enzymatic activites". Biocell. 31():134-.
2006Reeve, Wayne G., Brau, Lambert, Castelli, Joanne, Garau, Giovanni, Sohlenkamp, C, Geiger, O., Dilworth, Michael J., Glenn, Andrew R., Howieson, John G. and Tiwaril, Ravi P.. (2006). "The Sinorhizobium medicae WSM419 IpiA gene is transcriptionally activated by FsrR and required to enhance survival in lethal acid conditions". MICROBIOLOGY-SGM. 152(10):3049-3059. [doi:10.1099/mic.0.28764-0]17005985
2006Sánchez, F., Quinto, C., Lopez-Lara, I.M., and Geiger, O.. (2006). "Biology of Plant-Microbe Interactions". Proceedings of the 12th International Congress on Molecular Plant-Microbe Interactions. 5():1-717.
2006Geiger, O., Sohlenkamp, C and Lopez-Lara, I.M.,. (2006). "Function of rhizobial membrane lipids for the symbiosis with legumes". Proceedings of the 12th International Congress on Molecular Plant-Microbe Interactions. 5():132-137.
2006Lopez-Lara, I.M.,, Sohlenkamp, C and Geiger, O.. (2006). "The post-genomic era - What comes next?". Revista Latinoamericana De Microbiologia. 48(1):44-45. 17357573
2005Rojas-Jimenez, K., Sohlenkamp, C, Geiger, O., Martínez Romero, María Esperanza, Werner, D. and Vinuesa Fleischmann, Pablo. (2005). "A CIC chloride channel homolog and ornithine-containing membrane lipids of Rhizobium tropici CIAT899 are involved in symbiotic efficiency and acid tolerance". Molecular Plant-Microbe Interactions. 18(11):1175-1185. [doi:10.1094/MPMI-18-1175]16353552
2005Lopez-Lara, I.M.,, Gao, JL, Soto, MJ, Solares-Perez, A, Weissenmayer, B, Sohlenkamp, C, Verroios, GP, Thomas-Oates, J and Geiger, O.. (2005). "Phosphorus-free membrane lipids of Sinorhizobium meliloti are not required for the symbiosis with alfalfa but contribute to increased cell yields under phosphorus-limiting conditions of growth". Molecular Plant-Microbe Interactions. 18(9):973-982. [doi:10.1094/MPMI-18-0973]16167767
2004Gao, JL, Weissenmayer, B, Taylor, AM, Thomas-Oates, J, Lopez-Lara, I.M., and Geiger, O.. (2004). "Identification of a gene required for the formation of lyso-ornithine lipid, an intermediate in the biosynthesis of ornithine-containing lipids". Molecular Microbiology. 53(6):1757-1770. [doi:10.1111/j.1365-2958.2004.04240.x]15341653
2004Sepulveda, Edgardo, Perez-Mendoza, Daniel, Munoz, Socorro, Ramirez-Romero, Miguel A., Soto, Maria Jose, Cervantes, Laura, Herrera-Cervera, Jose A., Lopez-Lara, I.M.,, Geiger, O., Sanuan, Juan, Brom, Susana and Romero, David. (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
2004Geiger, O., Sohlenkamp, C, Martinez-Morales, F, Gao, JL, Zavaleta-Pastor, M and Lopez-Lara, I.M.,. (2004). "Regulation of membrane lipid biosynthesis in eubacteria". FASEB JOURNAL. 18(8, S):3-3.
2004Sohlenkamp, C, de Rudder, KEE and Geiger, O.. (2004). "Phosphatidylethanolamine Is Not Essential for Growth of Sinorhizobium meliloti on Complex Culture Media". Journal Of Bacteriology. 186(6):1667-1677. [doi:10.1128/JB.186.6.1667-1677.2004]14996797
2003Martinez-Morales, F, Schobert, M, Lopez-Lara, I.M., and Geiger, O.. (2003). "Pathways for phosphatidylcholine biosynthesis in bacteria". MICROBIOLOGY-SGM. 149(12):3461-3471. [doi:10.1099/mic.0.26522-0]14663079
2003Lopez-Lara, I.M.,, Sohlenkamp, C and Geiger, O.. (2003). "Membrane lipids in plant-associated bacteria: Their biosyntheses and possible functions". Molecular Plant-Microbe Interactions. 16(7):567-579. [doi:10.1094/MPMI.2003.16.7.567]12848422
2003Djordjevic, M.A., Chen, H.C., Natera, S., Van Noorden, G., Menzel, C., Taylor, S., Renard, C., Geiger, O. and Weiller, G.F.. (2003). "A global analysis of protein expression profiles in Sinorhizobium meliloti: Discovery of new genes for nodule occupancy and stress adaptation". Molecular Plant-Microbe Interactions. 16(6):508-524. [doi:10.1094/MPMI.2003.16.6.508]12795377
2003Sohlenkamp, C, Lopez-Lara, I.M., and Geiger, O.. (2003). "Biosynthesis of phosphatidylcholine in bacteria". Progress In Lipid Research. 42(2):115-162. [doi:10.1016/S0163-7827(02)00050-4]12547654
2002Weissenmayer, B, Gao, JL, Lopez-Lara, I.M., and Geiger, O.. (2002). "Identification of a gene required for the biosynthesis of ornithine-derived lipids". Molecular Microbiology. 45(3):721-733. [doi:10.1046/j.1365-2958.2002.03043.x]12139618
2002Geiger, O. and Lopez-Lara, I.M.,. (2002). "Rhizobial acyl carrier proteins and their roles in the formation of bacterial cell-surface components that are required for the development of nitrogen-fixing root nodules on legume hosts". Fems Microbiology Letters. 208(2):153-162. [doi:10.1016/S0378-1097(02)00478-0]11959430
2001Lopez-Lara, I.M., and Geiger, O.. (2001). "Novel pathway for phosphatidylcholine biosynthesis in bacteria associated with eukaryotes". JOURNAL OF BIOTECHNOLOGY. 91(2-3):211-221. [doi:10.1016/S0168-1656(01)00331-5]11566392
2001Minder, AC, de Rudder, KEE, Narberhaus, F, Fischer, HM, Hennecke, H and Geiger, O.. (2001). "Phosphatidylcholine levels in Bradyrhizobium japonicum membranes are critical for an efficient symbiosis with the soybean host plant". Molecular Microbiology. 39(5):1186-1198. [doi:10.1046/j.1365-2958.2001.02325.x]11251836
2001Lopez-Lara, I.M., and Geiger, O.. (2001). "The nodulation protein NodG shows the enzymatic activity of an 3-oxoacyl-acyl carrier protein reductase". Molecular Plant-Microbe Interactions. 14(3):349-357. [doi:10.1094/MPMI.2001.14.3.349]11277432
2000de Rudder, KEE, Lopez-Lara, I.M., and Geiger, O.. (2000). "Inactivation of the gene for phospholipid N-methyltransferase in Sinorhizobium meliloti: Phosphatidylcholine is required for normal growth". Molecular Microbiology. 37(4):763-772. [doi:10.1046/j.1365-2958.2000.02032.x]10972799
2000Sohlenkamp, C, de Rudder, KEE, Rohrs, V, Lopez-Lara, I.M., and Geiger, O.. (2000). "Cloning and characterization of the gene for phosphatidylcholine synthase". JOURNAL OF BIOLOGICAL CHEMISTRY. 275(25):18919-18925. [doi:10.1074/jbc.M000844200]10858449
2000Weissenmayer, B, Geiger, O. and Benning, C. (2000). "Disruption of a gene essential for sulfoquinovosyldiacylglycerol biosynthesis in Sinorhizobium meliloti has no detectable effect on root nodule symbiosis". Molecular Plant-Microbe Interactions. 13(6):666-672. [doi:10.1094/MPMI.2000.13.6.666]10830266
1999de Rudder, KEE, Sohlenkamp, C and Geiger, O.. (1999). "Plant-exuded choline is used for rhizobial membrane lipid biosynthesis by phosphatidylcholine synthase". JOURNAL OF BIOLOGICAL CHEMISTRY. 274(28):20011-20016. [doi:10.1074/jbc.274.28.20011]10391951