Matthew H.J. Cordes
Associate Professor of Biochemistry and Molecular Biophysics
Ph.D. 1994, Yale University

Evolution of the structure and function of proteins; Conformational change in proteins

Website: Laboratory Home Page

Research Interests

Molecular evolution is a critical research focus in the post-genome age of biology. With the current explosion of genome sequencing projects and the expansion of biomolecular structure databases, we finally have the opportunity to comprehensively appreciate and study the diversity and diversification of biological molecules. My research is focused on four areas within this field: 1) the origin and evolution of the approximately 1000 known basic types of protein structure, called folds; 2) the evolution of the function of sequence-specific DNA-binding proteins; 3) the evolution of proteins to avoid incorrect folding and aggregation, which can lead to many diseases, including Alzheimer's and prion disorders; 4) the evolution of protein toxins from nontoxic ancestor proteins. We approach these problems using a combination of computational studies (bioinformatics) with experimental structural biology (NMR and X-ray crystallography), biochemistry, and protein design. Perhaps the best example of our research progress to date is our characterization of a remarkable evolutionary structural metamorphosis, involving a switch from alpha-helical to beta-sheet secondary structure, in the Cro family of transcription factors (see Van Dorn et al, 2006; Newlove et al, 2004).

Select Publications

"N15 Cro and lambda Cro: orthologous DNA-binding domains with completely different but equally effective homodimer interfaces", M.S. Dubrava, W.M. Ingram, S.A. Roberts, A. Weichsel, W.R. Montfort, M.H.J. Cordes, Protein Science, in press (2008).

"Transitive homology-guided structural studies lead to discovery of Cro proteins with 40% sequence identity but different folds", C.G. Roessler, B.M. Hall, W.J. Anderson, W.M. Ingram, S.A. Roberts, W.R. Montfort, M.H.J. Cordes, Proc. Natl. Acad. Sci. USA,  2343-8 (2008).  See also commentary, p. 2759.

"Two structures of a lambda Cro variant highlight dimer flexibility but disfavor major dimer distortions upon specific binding of cognate DNA", B.M. Hall, S.A. Roberts, A.M. Heroux, M.H.J. Cordes, J. Mol. Biol. 375, 802-811 (2008).

"Conservation and diversity in the immunity regions of wild phage with the immunity specificity of phage lambda", P.H. Degnan, C.B. Michalowski, A.C. Babic, M.H.J. Cordes, J.W Little, Mol. Microbiol. 64, 232-244 (2007).

"High polar content of long buried blocks of sequence in protein domains suggests selection against amyloidogenic nonpolar sequences", A.U. Patki, A.C. Hausrath and M.H.J. Cordes, J. Mol. Biol., 362, 800–809 (2006).

"Relationship between sequence determinants of stability for two natural homologous proteins with different folds", L.O. Van Dorn, T. Newlove, S. Chang, W.M. Ingram and M.H.J. Cordes, Biochemistry, 45, 10542–10553 (2006).

 "A trade between similar but nonequivalent intrasubunit and intersubunit contacts in Cro dimer evolution", T. Newlove, K.R. Atkinson, L.O. Van Dorn, M.H.J. Cordes, Biochemistry, 45, 6379-6391 (2006).

"Lateral gene transfer of a dermonecrotic toxin between spiders and bacteria", M.H.J. Cordes and G.J. Binford, Bioinformatics, 22, 264-268 (2006).

 “Sequence correlations between Cro recognition helices and cognate O R consensus half-sites suggest conserved rules of protein-DNA recognition” B.M. Hall, K.R. LeFevre, M.H.J. Cordes, Journal of Molecular Biology 350, 667-681 (2005).

"Sphingomyelinase D from venoms of brown spiders: evolutionary insights from cDNA sequences and gene structure," G.J. Binford, M.H.J. Cordes, M.A. Wells, Toxicon, 45, 547-560 (2005).

"Secondary structure switching in Cro protein evolution," T. Newlove, J. H. Konieczka, M.H.J. Cordes, Structure12, 569-581 (2004). (editor's featured article, must read on Faculty of 1000).

 "Retroevolution of lambda Cro toward a stable monomer," K.R. LeFevre, M.H.J. Cordes, Proc. Natl. Acad. Sci. U.S.A. 100, 2345-2350 (2003).

Contact Information

Mailing:
Dr. Matthew Cordes, Assistant Professor
Department of Biochemistry & Molecular Biophysics
University of Arizona
1041 E. Lowell Street
Biosciences West 436
Tucson AZ 85721-0088

Telephone: (520)626-1175/1170
Fax: (520)626-9204, or -9288

cordes@u.arizona.edu

Biological Sciences West
1041 East Lowell Street
P.O. Box 210088 · Tucson, AZ 85721-0088
Tel: (520) 621-5110
FAX (520) 626-9204

Life Sciences South
1007 East Lowell Street
P.O. Box 210106 · Tucson, AZ 85721-0106
FAX (520) 621-3709