 |
| S.U.N.Y. O.C.C.
A.S., 1995. |
S.U.N.Y.
College of Environmental Science and Forestry B.S., magna cum laude 1998.
|
The
University of Chicago, M.S., 2000 Ph.D., 2005.
|
| The Scripps
Research Institute, Post-Doc, 2005-2007. |
California
State University Long Beach, Assistant Professor, 2007-
|
|
| Awards |
| Mayfield Award for Outstanding Faculty Member in College of Natural Sciences and Mathematics, CSULB May 2010 |
| Edith Barnard
Memorial Award in Chemistry for Service to Others, The University of
Chicago May 2005 |
| Freud
Departmental Citizenship Award, The University of Chicago May 2005 |
| NIH
Pre-doctoral Training Grant for Chemistry and Biology, National
Institutes of Health 2000-2002 |
| James Franck
Fellowship, The University of Chicago 1999 |
| Merck Award for
Environmental Biochemistry, Merck & Co. Inc. 1998 |
| Ernest
Sondheimer Memorial Award 1998 |
| John Meyer
Environmental Chemistry Award 1997 |
|
|
| Michael P. Schramm |
| Assistant Professor |
|
|
| |
| News: |
| |
January 2012: Katie Feher and Hai Hoang's work on "Embedding resorcinarene cavitands in lipid vesicles" has been accepted for publication in RCS's New Journal of Chemistry. (Feher, K. M., Hoang, H., Schramm, M. P. New J. Chem. 2012 full citation forthcoming) |
September 2011: Katie Feher, Cindy Pham, Nicole Mangabat, and Jeanice Rodriguez presented posters at the 2011 College of Natural Sciences and Mathematics Poster session on their work. |
September 2011: The National Cancer Institute awarded us a National Institutes of Health SCORE grant (SC2) for $433,500 over a 3 year period to work on "Selective Small Molecule Membrane Transport Using Cavitand Receptors." |
July 2011: Our first publication has been accepted to Chemical Communications. “pH Influenced Molecular Switching with Micelle Bound Cavitands” Kim, Y. J., Lek, M. T., Schramm, M. P. Chem. Commun. 2011, 47, 9639-9638. DOI:10.1039/C1CC12901E |
April 2011: Monica Royer presented her work towards Modular alpha-Helical Peptidomimectics at UC Santa Barbara SCURC conference |
April 2011: Katie Feher presented her work towards Selective Small Molecule Membrane Transport at UC Santa Barbara SCURC conference |
December 2010: Professor Schramm presented the group's work at Pacifichem in Honolulu - “Preparation and Screening of a Modular alpha-Helical Peptidomimetic Library.” |
July 2010: New Publication in Organic Syntheses
“Cycloaddition of 1-Triisopropylsiloxy-1-hexyne with Methyl Crotonate: 3-Butyl-4-methyl-2-triisopropylsiloxy-cyclobut-2-enecarboxylic Acid Methyl Ester.” Schramm, M. P.; Shubinets, V. Kozmin, S. A.*
Org. Synth. 2010, 87, 253-263. |
May 2010: Prof. Schramm was awarded the Mayfield Award for Outstanding Faculty Member in College of Natural Sciences and Mathematics, CSULB August 2010 |
May 2010: Brittany Maynard was awarded an Undergraduate Research Fellowship from the Department of Chemistry and Biochemistry for Summer 2010. |
April 2010: Michelle Hansol Park presented a poster on her progress towards preparing a library of alpha-helical Peptidomimetics at the 2010 ACS Undergraduate Research Symposium at Chapman University |
March 2010: Massiel Trujillo was accepted to UCSF's Pharm.D. Program, congratuations Massiel! |
December 2009: Prof. Schramm presented the Schramm lab's work at CSU Northridge as part of their seminar series. |
September 2009: Jenny Pham and Michelle Hansol Park presented individual posters on their progress towards preparing a library of alpha-helical Peptidomimetics at the 2009 CNSM Poster Session. |
August 2009: New Publication in Tetrahedron
"Translational motion insideself-assembled encapsulation complexes "
Dariush Ajami, Michael P. Schramm, Julius Rebek, Jr.*
Tetrahedron 65 (2009) 7208–7212. |
| |
| Research Interests: |
Molecular recognition is the
study of how and why molecules interact. At its essence lies the
attraction of molecules at energy levels “weaker than covalent.”
Hydrogen bonding, metal coordination, and the hydrophobic effect cover
some of these possible forces. In nature we find countless crucial
interactions predicated on noncovalent interactions such as;
enzyme-substrate recognition, DNA-protein binding, and ion-receptor
transport. From a synthetic point of view these principles have
strongly influenced areas of research from drug design to materials
science to molecular self-assembly. Our research uses molecular
recognition as a design principle to develop new synthetic molecules
that are compatible with and capable of regulating biological function.
|
| Selective Small-Molecule
Membrane Transport via Synthetic Molecular Receptors |
Recently, we discovered that
a series of cavitands (synthetic vase-shaped molecular receptors)
exhibited selective recognition when immersed in aqueous phosphocholine
micelles. Cavitands of this type typically only function in organic
solvents. In water they display very poor solubility – in fact their
function as a receptor is non-existent in pure water as they tend to
form cavity-less dimers. In the presence of micelles, however, their
behavior as selective receptors was restored. Adamantanes served as an
ideal guest “handle.” We appended this particular handle with a variety
of functional groups (in the illustrated case a green fluorophore) and
these guests were observed to bind on the NMR timescale. This binding
event occurred despite the guest’s lack water solubility and the
presence of a virtual sea of competing alkyl chains present in the
micelle interior.
|
| |
 |
| |
Micelles serve as the most
simplistic model of biological membranes. In the next stage of this
research program we will employ our cavitands and study whether they
are capable of transporting small molecules across the lipid bilayer of
unilamellar vesicles. The ultimate goal of this project is the
transport of small drug-like molecules across mammalian cell membranes.
Students
interested
in synthesis, host-guest interactions, membrane
transport, or fluorescence microscopy are encouraged to inquire
further.
|
| Modular α-Helical
Peptidomimetics |
The field of peptidomimetics
emerged in part due to the failure of peptides and proteins to serve as
drugs. Several factors contribute to poor protein/peptide
bioavailability such as: proteolytic degradation, poor membrane
penetration, and conformational instability. The discovery that
proteins typically interact through small portions of their total
surface established a new paradigm for small molecule design; to
localize amino acid side chain analogs in space such that they
interact/interrupt as the progenitor protein would. The α-helix is an
important structural model in the study of protein-protein interactions
(e.g. calmodulin-smMLCK) and has served as a peptidomimetic model in
the study of apoptosis. The Bak-Bcl and p53-HDM2 interactions involve
key α-helical subdomains as their main recognition motif and serve as
important regulatory mechanisms for cell death, thus making them both
of great interest to chemotherapy. Several studies have already been
directed at these targets, the most notable relying on a terphenyl
scaffold that successfully positions the side-chain analogs in space
mimicking the native protein. Molecular modeling demonstrates this, but
true validation was shown through in vitro analysis, which resulted in
sub-micromolar hits. The key to understanding α-helical mimetic design
is that the side chains of the parent protein responsible for activity
are on the same face of the helix, and are arranged at either i, i+3,
and i+7, or i, i+4, and i+7 intervals. The figure below demonstrates
the geometric similarities between a natural peptide made of 8 alanine
residues and one of our mimetic prototypes. The key residues are in
good spatial agreement as measured by molecular modeling.
|
| |
 |
| |
Almost all peptidomimetic
strategies to date suffer from several major problems: 1) limited water
solubility, 2) non-modular, and 3) lengthy (10+ step) syntheses. We aim
to overcome these challenges using a combinatorial approach, where a
library of building blocks are assembled in a few simple steps to
generate libraries of 100s to 1000s of compounds whose properties can
readily be tested using in vitro high-throughput screening techniques.
Thus far we have acheived progress towards several of these goals and have developed a consise strategy to make a structurally diverse library.
|
 |
|
Students
interested in synthesis, drug-design, drug-screening, or molecular
modeling are encouraged to inquire further.
|
| Chirality and Catalysis |
| The study of chirality and
catalysis are two cornerstones of modern organic
synthesis. We are currently exploring these areas from a less
traditional
angle. Students intersted in these areas are encouraged to make
contact for more details. |
| |
| Selected References |
pH Influenced Molecular Switching with Micelle Bound Cavitands Kim, Y. J., Lek, M. T., Schramm, M. P. Chem. Commun. 2011, 47, 9639-9638. |
Compounds with All-Carbon Functions:1,3-dienes, Synthesis by Elimination Reactions Schramm, M. P. (2009) Science of Synthesis, Houben-Weyl Methods of Molecular Transformation, Georg Thieme Verlag KG, 46.9. |
Translational motion inside self-assembled encapsulation complexes Ajami, D., Schramm, M. P., Rebek, J. Jr. Tetrahedron 2009, 65, 7208–7212 DOI: 10.1016/j.tet.2008.06.108 |
Effects of Remote Chiral
Centers on Encapsulated Molecules
Schramm, M. P., Rebek, J., Jr.
New J. Chem. 2008, 32, 794-796. |
Influence of Remote
Asymmetric Centers in Reversible Encapsulation Complexes
Schramm, M. P., Restorp, P., Zelder, F., Rebek, J., Jr.
J. Am. Chem. Soc. 2008, 130, 2450-2451. |
Guest Recognition with
Micelle-Bound Cavitands
Schramm, M. P., Hooley, R. J., Rebek, J., Jr.
J. Am. Chem. Soc.
(Article), 2007, 129, 9773-9779. |
Assembly of Hybrid Synthetic
Structures
Ajami, D., Schramm, M. P., Volonterio, A., Rebek, J.
Angew. Chem. Int. Ed. 2007, 46,
242-244. |
Moving Targets: Recognition
of Alkyl Groups
Schramm, M. P., Rebek, J.
Chem. --Eur. J. (Review, Cover Article) 2006,
12, 5924-5933. |
Silver Catalzyed [2+2]
Cycloaddtions of Siloxyalkynes
Sweis, R. A., Schramm, M. P., Kozmin, S. A.
J. Am. Chem. Soc. 2004,
7442-7443. |
Siloxyalkyne-Alkene
Metathesis: Rapid Access to Highly Functionalized Enones.
Schramm, M. P., Reddy, D. S., Kozmin, S. A.
Angew. Chem. Int. Ed. 2001,
4274-4277. |
| |
|