Michael L. Summers
Department of Biology
Californal State University Northridge
Northridge, CA 91330-8303
(818) 677-7146 fax:(818) 677-2034
1976 B.S. Biology, Heidelberg College, Tiffin, OH
1977 Comprehensive Science teaching credential,
Heidelberg College, Tiffin, OH
1995 Ph.D. Microbiology, University of
California at Davis
(Dissertation: "The Role and Regulation of
Glucose-6-Phosphate Dehydrogenase in Heterotrophic and Diazotrophic
Growth of Nostoc sp. Strain ATCC 29133". Advisor: J.C. Meeks)
1977-78 High School Science Teacher, Rolling Hills Local School
Dist. Byesville, OH
1978-81 Jr. High School Science Teacher, Kingman City School Dist.
1981-84 High School Science Teacher, Orford School Dist. Orford, NH
1984-88 Jr. High School Science Teacher, Silver Valley Local School
Dist. Daggett, CA
1989-94 Teaching Assistant: Introduction to Biological Science,
Bacteriology Laboratory, Microbial Ecology, U.C. Davis, Davis, CA
1990-94 Research Assistant: Physiology and genetics of symbiotic and
diazotrophic cyanobacteria, U.C. Davis, Davis, CA
1995-98 Postdoctoral Research Associate: Physiology and genetics
of phosphorous metabolism in free-living and symbiotic rhizobia,
Montana State University, Bozeman, MT
Professor; 2003-2007 Associate Professor; 2007-Present
Full Professor - California State University
Northridge, Northridge, CA: teaching Principles of
Bacterial Diversity, Molecular Genetics of Prokaryotes, Gentics of
Bacteria and their Viruses, Graduate Seminars; researching physiology
and genetics of cyanobacterial metabolism and cell development
American Society for Microbiology
Maldener, I., M.L. Summers and A. Sukenik. Cellular Differentiation in
Filamentous Cyanobacteria, in The Cell Biology of Cyanobacteria. E.
Flores and A. Herrero (ed). Caister Academic Press, Norfolk, UK (in
preparation for 2013 publication)
Holmquist, C.P., G.P. Holmquist, and M.L. Summers. 2011.
Comparing binding site information to binding affinity reveals that
Crp/DNA complexes have several distinct binding conformers.
Nucleic Acids Research 39(15):6813-24 click
here to down load paper
Kaplan-Levy, R.N.; O., Hadas; M.L., Summers; J., Rücker; A.,
Sukenik. 2010. Akinetes: Dormant Cells of
Cyanobacteria. Dormancy and resistance in harsh
environments. E. Lubzens, J. Cerdà and M. Clark
(Eds.), Topics in Current Genetics, Vol. 21. Springer-Verlag
Hedger, J , P.C. Holmquist, K.A. Leigh, K. Saraff, C. Pomykal, and M.L.
Summers. 2009. Illumination stimulates cAMP receptor protein dependent
transcriptional activation from regulatory regions containing type
I, and II promoter elements in Synechocystis
sp. PCC 6803.
Microbiology 155: 2994-3004 (view manuscript as PDF
Campbell, E.L., M.L. Summers, H. Christman, M.E. Martin, and J.C.
Meeks. 2007. Global
gene expression patterns of Nostoc punctiforme in
steady state dinitrogen-grown heterocyst-containing cultures and at
single time points during the differentiation of akinetes and
hormogonia. Journal of Bacteriology 189:5247-5256.
Argueta, C., K. Yuksek, R. Patel, and M.L Summers. 2006. Identification of Nostoc punctiforme
akinete-expressed genes using differential display. Molecular
Welty, L.A.Y., E.L. Heinrich, K. Garcia, L.R. Banner, M.L. Summers, L.
Baresi, S. Metzenberg, C. Coyl-Thompson, and S.B. Oppenheimer. 2005.
of Unconventional approaches for the rapid detection of
surface lectin binding ligands on human cell lines. ACTA
Argueta, C and M.L. Summers. 2005. Characterization of
a model system
for the study of Nostoc punctiforme akinetes.
Argueta, C., K. Yuksek, and M.L. Summers. 2004. Construction
and use of
GFP reporter vectors for analysis of cell-type-specific gene expression
in Nostoc punctiforme.
Journal of Microbiological Methods 59:181-188.
Meeks, J.C., E.L. Campbell, M.L. Summers, F.C. Wong. 2002. Cellular
differentiation in the cyanobacterium Nostoc punctiforme.
Summers, M.L., L. M. Botero, S.C. Busse, and Timothy R. McDermott.
Sinorhizobium meliloti Lon protease is involved in
regulating exopolysaccharide synthesis and is required for
nodulation of alfalfa. Journal of Bacteriology 182:2551-2558.
Summers, M.L., M.C. Denton, T.R. McDermott. 1999. Genes
phosphotransacetylase and acetate kinase in Sinorhizobium meliloti
in an operon that is inducible by phosphate stress and controlled by
PhoB. Journal of Bacteriology 181:2217-24.
Summers, M.L., J.G. Elkins, B. Elliot, T.R. McDermott.
1998. Expression and regulation of phosphate starvation inducible
genes in Rhizobium meliloti. Molecular Plant Microbe
Deng, S., M.L. Summers, M.L. Kahn, and T.R. McDermott. 1998.
and characterization of a Rhizobium meliloti nonspecific acid
phosphatase. Archives of Microbiology 170:18-26.
Stout, R.G., M.L. Summers, T. Kerstetter, and T.R. McDermott.
1997. Heat- and acid-tolerance of a grass commonly found in geothermal
areas within Yellowstone National Park. Plant Science 130:1-9.
Al-Niemi, T.S., M.L. Summers, J.G. Elkins, M.L. Kahn, T.R. McDermott.
1997. Regulation of the phosphate stress response in Rhizobium
meliloti by PhoB. Applied and Environmental Microbiology
Summers, M.L., and J.C. Meeks. 1996. Transcriptional regulation
of zwf, encoding glucose-6-phosphate dehydrogenase, from the
cyanobacterium Nostoc punctiforme strain ATCC 29133. Molecular
Campbell, E.L, K.D. Hagen, M.F. Cohen, M.L. Summers, and J.C. Meeks.
devR gene product is characteristic of receivers of
two-component regulatory systems and is essential for heterocyst
development in the filamentous cyanobacterium Nostoc sp. strain
29133. Journal of Bacteriology 178:2037-2043.
Summers, M.L., J.G. Wallis, E.L. Campbell, and J.C. Meeks. 1995 Genetic
evidence of a major role for glucose-6-phosphate dehydrogenase in
nitrogen fixation and dark growth of the cyanobacterium Nostoc
strain ATCC 29133. Journal of Bacteriology 177:6184-6194.
Summers, M.L., J.C. Meeks, S. Chu, and R.E. Wolf, Jr. 1995.
sequence of an operon in Nostoc sp. strain ATCC 29133
encoding four genes of the oxidative pentose phosphate cycle. Plant
Physiology 107: 267-268.