Bob Sauer's Lab

CHRISTOPHER FARRELL

Christopher Farrell
Graduate Student (2002-2007)
Email (cmf at alum.mit.edu)

Scientist
Microbia

Farrell. C.M., Baker, T.A. & Sauer, R.T. (2007) Altered specificity of a AAA+ protease. Mol. Cell 25, 161-166.

Farrell, C.M., Grossman, A.D. & Sauer, R.T. (2005) Cytoplasmic degradation of ssrA-tagged proteins. Mol. Micro. 57, 1750-1761. pubmed citation

KATHLEEN MCGINNESS

Kathleen E. McGinness
Postdoc (2001-2006 )
Email (kmcginness at gmail.com)

Scientist
Archemix Corp.

McGinness, K.E., Bolon, D.N., Kaganovich, M., Baker, T.A. & Sauer, R.T. (2007) Altered tethering of the SspB adaptor to the ClpXP protease causes changes in substrate delivery. J. Biol. Chem. 282, 11465-11473.

McGinness, K.E., Baker, T.A., & Sauer, R.T. (2006) Engineering controllable protein degradation. Mol. Cell 22, 701-707. pubmed. citation

McGinness, K.E. & Sauer, R.T. (2004) Ribosomal protein S1 binds mRNA and tmRNA similarly but plays distinct roles in translation of these molecules. Proc. Natl. Acad. Sci. USA 101, 13454-13459. pubmed citation

Moore, S.D., McGinness, K.E. & Sauer, R.T. (2003) A glimpse into tmRNA-mediated ribosome rescue. Science 300, 72-73.

GREG HERSCH

Greg Hersch
Grad Student (2002-2006)
Email (Hersch at alum.mit.edu)
Consultant
Boston Consulting Group

Hersch, G.L., Burton, R.E., Bolon, D.N., Baker, T.A. & Sauer, R.T. (2005) Asymmetric interactions of ATP with the AAA+ ClpX6 unfoldase: allosteric control of a protein machine. Cell 121, 1017-1027. pubmed. citation

Hersch, G.L., Baker, T.A. & Sauer, R.T. (2004) SspB delivery of substrates for ClpXP proteolysis probed by th design of mproved degradation tags. Proc. Natl. Acad. Sci. USA 101 (33) 12136-12141 . pubmed. citation

Bolon, D.N., Wah, D.A., Hersch G.L., Baker T.A., & Sauer, R.T. (2004) Bivalent tethering of SspB to ClpXP is required for efficient substrate deliver: a protein-design study. Mol. Cell, 13, 443-449. pubmed. citation

Joshi, S.A., Hersch, G.L., Baker, T.A. & Sauer, R.T. (2004) Communication between ClpX and ClpP during substrate processing and degradation. Nature Structural & Molecular Biology 11, 404-411. pubmed. citation

DANIEL BOLON

Dan Bolon
Postdoc (2001-2005)
Email (Dan.Bolon at umassmed.edu)

Faculty
UMass Medical School

McGinness, K.E., Bolon, D.N., Kaganovich, M., Baker, T.A. & Sauer, R.T. (2007) Altered tethering of the SspB adaptor to the ClpXP protease causes changes in substrate delivery. J. Biol. Chem. 282, 11465-11473.

Bolon, D.\N., Grant, R.A., Baker, T.A., & Sauer, R.T. (2005) Specificity versus stability in computational protein design. Proc. Natl. Acad. Sci. USA 102, 12724-12729. pubmed. citation

Bolon, D.N., Grant, R.A., Baker, T.A., & Sauer, R.T. (2004) Nucleotide-dependent substrate handoff from the SspB adaptor to the AAA+ ClpXP protease. Mol. Cell 16, 443-450. pubmed. citation

Bolon, D.N., Wah, D.A., Hersch, G.L., Baker, T.A., & Sauer, R.T. (2004) Bivalent tethering of SspB to ClpXP is required for efficient substrate delivery: a protein-design study. Mol. Cell 13, 443-449. pubmed. citation

Wah, D.A., Levchenko, I., Rieckhof, G.E., Bolon, D.N., Baker, T.A., & Sauer, R.T. (2003) Flexible linkers leash the substrate binding domain of SspB to a peptide module that stabilizes delivery complexes with the AAA+ ClpXP protease. Mol. Cell 12, 355-363. pubmed. citation

CHRISTOPHER HAYES

Christopher Hayes
Postdoc (2000-2004)
Email (chayes at lifesci.ucsb.edu)

Faculty
University of California Santa Barbara

Hayes, C.S. & Sauer, R.T. (2003) Toxin-antitoxin pairs in bacteria: Killers or stress regulators? Cell. 112, 2-4. pubmed. citation

Hayes, C.S., & Sauer, R.T. (2003) Cleavage of the A site mRNA codon during ribosome pausing provides a mechanism for translational quality control. Mol. Cell 12, 903-911. pubmed. citation

Hayes, C.S., Bose, B. & Sauer, R.T. (2002) Proline residues at the C terminus of nascent chains induce SsrA tagging during translation termination. J. Biol. Chem. 277, 33825-33832. pubmed. citation

Hayes, C.S., Bose, B. & Sauer, R.T. (2002) Stop codons preceded by rare arginine codons are efficient determinants of SsrA-tagging in Escherichia coli. Proc. Natl. Acad. Sci. USA 99, 3440-3445. pubmed. citation

JON KENNISTON

Jon Kenniston
Graduate Student (2001-2005)
Email (jkennist at mail.med.upenn.edu )

Postdoctoral Researcher - Lemmon Lab
University of Pennsylvania Medical School

Kenniston, J.A., Baker, T.A., & Sauer, R.T. (2005) Partitioning between unfolding and release of native domains during ClpXP degradation determines substrate selectivity and partial processing. Proc. Natl. Acad. Sci. USA 102, 1390-1395. pubmed. citation

Kenniston, J.A., Burton, R.E., Siddiqui S.M., Baker, T.A., & Sauer, R.T. (2004) Effects of local protein stability and the geometric position of the substrate degradation tag on the efficiency of ClpXP denaturation and degradation. J. Struct. Biol. 146, 130-140. pubmed. citation

Kenniston, J.A., Baker, T.A., Fernandez, J.M., & Sauer, R.T. (2003) Linkage between ATP consumption and mechanical unfolding during the protein processing reactions of an AAA+ degradation machine. Cell 114, 511-520. pubmed. citation

Kenniston, J.A., and Sauer, R.T. (2004) Signaling Degradation. Nature Structure and Molecular Biology 11, 800-802. pubmed. citation

SHILPA JOSHI

Shilpa Joshi
Graduate Student (1998-2004)
Email (Joshi.Shilpa at gene.com)

Postdoctoral Fellow - Genentech
Lab - Eric Brown

Joshi, S.A., Hersch, G.L., Baker, T.A. & Sauer, R.T. (2004) Communication between ClpX and ClpP during substrate processing and degradation. Nature Structural & Molecular Biology 11, 404-411. pubmed. citation

Joshi, S.A., Baker, T.A. & Sauer, R.T. (2003) C-terminal domain mutations in ClpX uncouple substrate binding from an engagement step required for unfolding. Mol. Micro. 48, 67-76. pubmed. citation

RANDALL BURTON

Randall Burton
Postdoc (1998-2005)
Email (rburton at usgenomics.com)

Research Scientist
US Genomics

Burton, R.E., Baker, T.A., Sauer, R.T. (2005) Nucleotide-dependent substrate recognition by the AAA+ HsIUV protease. Nature Structural and Molecular Biology, 12: 245-251. pubmed citation

Kenniston, J.A., Burton, R.E., Siddiqui, S.M., Baker, T.A. & Sauer, R.T. (2004) Effects of local protein stability and the geometric position of the substrate degradation tag on the efficiency of ClpXP denaturation and degradation. J. Struct. Biol. 146, 130-140. pubmed citation

Burton, R.E., Baker, T.A. & Sauer, R.T. (2003) Energy-dependent degradation: Linkage between ClpX-catalyzed nucleotide hydrolysis and protein-substrate processing. Protein Sci. 12, 893-902. pubmed citation

Burton, R.E., Siddiqui, S.M., Kim, Y.I., Baker, T.A. & Sauer, R.T. (2001) Effects of protein stability and structure on substrate processing by the ClpXP unfolding and degradation machine. EMBO Journal 20, 3092-3100. pubmed citation

Cordes, M.H.J., Burton, R.E., Walsh, N.P., McKnight, C.J. & Sauer, R.T. (2000) An Evolutionary Bridge to a New Protein Fold. Nature Structural Biology 7, 1129-1132. pubmed citation

Kim, Y.I., Burton, R.E., Burton, B.M., Sauer, R.T. & Baker, T.A. (2000) Dynamics of Substrate Denaturation and Translocation by the ClpXP Degradation Machine. Molecular Cell 5, 639-648. pubmed citation

DAVID WAH

David Wah
Postdoc (2000-2004)
Email (davidwah at phri.org)

Faculty
Public Health Research Institute

Levchenko, I., Grant, R.A., Wah, D.A., Sauer, R.T., & Baker, T.A. (2003) Structure of a delivery protein for an AAA+ protease in complex with a peptide degradation tag. Mol. Cell 12, 365-372. pubmed. citation

Wah, D.A., Levchenko, I., Rieckhof, G.E., Bolon, D.N., Baker, T.A., & Sauer, R.T. (2003) Flexible linkers leash the substrate binding domain of SspB to a peptide module that stabilizes delivery complexes with the AAA+ ClpXP protease. Mol. Cell 12, 355-363. pubmed. citation

Wah, D.A., Levchenko, I., Baker, T.A., & Sauer, R.T. (2002) Characterization of a specificity factor for an AAA+ ATPase: Assembly of SspB dimers with ssrA-tagged proteins and the ClpX hexamer Chem. Biol. 9, 1237-1245. pubmed. citation

Bolon, D.N., Wah, D.A., Hersch G.L., Baker T.A., & Sauer, R.T. (2004) Bivalent tethering of SspB to ClpXP is required for efficient substrate deliver: a protein-design study. Mol. Cell, 13, 443-449. pubmed. citation

SHARI SPECTOR

Shari Spector
Postdoc Sauer/Biology and Tidor/EECS/BE Labs (1999-2003)
Email (sharispector at rcn.com)

Research Scientist
Millipore Corporation

Spector, S., Sauer, R.T., & Tidor, B. (2004) Computational and experimental probes of symmetry mismatches in the Arc repressor-DNA complex. J Mol. Biol. 340, 253-261. pubmed citation

Spector, S., Flynn, J.M., Tidor, B., Baker, T.A., & Sauer, R.T. (2003) Expression of N-formylated proteins in Escherichia coli. Protein Expr. Purif. 32, 317-322. pubmed citation

BIJOU BOSE

Bijou Bose
Technical Assistant (2000-2003)
Email (bbose at mit.edu)

Graduate Student - Grossman Lab
Massachusetts Institute of Technology

Hayes, C.S., Bose, B. & Sauer, R.T. (2002) Proline residues at the C terminus of nascent chains induce SsrA tagging during translation termination. J. Biol. Chem. 277, 33825-33832. pubmed. citation

Hayes, C.S., Bose, B. & Sauer, R.T. (2002) Stop codons preceded by rare arginine codons are efficient determinants of SsrA-tagging in Escherichia coli. Proc. Natl. Acad. Sci. USA 99, 3440-3445. pubmed. citation

RAMON TABTIANG

NO PHOTO AVAILABLE

Ramon Tabtiang, Esq.
Postdoc (1998-2003)
Email (tabtiang at fr.com)

Lawyer
Fish and Richardson

Tabtiang, R.K., Cezairliyan, B.O., Grant, R.A., Cochrane, J.C. & Sauer, R.T. (2005) Consolidating critical binding determinants by non-cyclic rearrangement of protein secondary structure. Proc. Natl. Acad. Sci. USA 102, 2305-2309. pubmed. citation

TONY ANDERSON

Tony Anderson
Graduate Student (1998-2002)
Email (tanthonya at yahoo.com)

University of California, San Francisco

Anderson, T.A. & Sauer, R.T. (2003) Role of an Ncap Residue in Determining the Stability and Operator-Binding Affinity of Arc Repressor, Biophys. Chem. 100, 341-350. pubmed. citation

CATHERINE SMITH

Catherine Smith
Postdoc (1997-2001)
Email (catherine.smith15 at spcorp.com)

Associate Principal Scientist
Schering Plough Research Institute

Smith, C.K., Wohnert, J., Sauer, R.T. & Schwalbe, H. (2001) Assignments of the 1H, 13C, and 15N resonances of the substrate-binding SSD domain from Lon protease. Journal of Biomolecular NMR 21, 387-388. pubmed. citation

Smith, C.K., Baker, T.A., & Sauer, R.T. (1999) Lon and Clp Family Proteases and Chaperones Share Homologous Substrate-Recognition Domains. Proc. Natl. Acad. Sci. USA 96, 6678-6682. pubmed. citation

Levchenko, I., Smith, C.K., Walsh, N.P., Sauer, R.T. & Baker, T.A. (1997) PDZ-like Domains Mediate Binding Specificity in the Clp/Hsp100 Family of Chaperones and Protease Regulatory Subunits. Cell 91, 939-947. pubmed. citation

MIKE NOHAILE

Michael Nohaile
Postdoc (1997-2000)
Email (nohaile at alum.mit.edu)

Partner
McKinsey & Company, Inc.

Nohaile, M.J., Hendsch, Z.S., Tidor, B. & Sauer, R.T. (2001) Altering Dimerization Specificity by Changes in Surface Electrostatics. Proc. Natl. Acad. Sci. USA 98, 3109-3114. pubmed. citation

Hendsch, Z.S., Nohaile, M.J., Sauer, R.T., & Tidor, B. (2001) Preferential Heterodimer Formation Via Undercompenstated Electrostatic Interactions. J. Amer. Chem. Soc. 123, 1264-1265. pubmed. citation

EHUD GAZIT

Ehud Gazit
Postdoc (1997-2000)
Email (ehudg at post.tau.ac.il)

Faculty
Tel-Aviv University

Gazit, E. & Sauer, R.T. (1999) The Doc Toxin and Phd Antidote Proteins of the Bacteriophage P1 Plasmid Addiction System Form a Heterotrimeric Complex. J. Biol. Chem. 274,16813-16818. pubmed. citation

Gazit, E. & Sauer, R.T. (1999) Stability and DNA Binding of the Phd Protein of the Phage P1 Plasmid Addiction System. J. Biol. Chem. 274, 2652-2657. pubmed citation

JOHN LO

NO PHOTO AVAILABLE

John Lo
Graduate Student (1997-2000)
Email (johnlo at alum.mit.edu)

Novartis

Lo, J., Baker, T.A. & Sauer, R.T. (2001) Characterization of the N-terminal Repeat Domain of E. coli ClpA—a Class I Clp/HSP100 ATPase. Protein Science 10, 551-559. pubmed. citation

Singh SK, Rozycki J, Ortega J, Ishikawa T, Lo J, Steven AC, Maurizi MR. (2001)
Functional domains of the ClpA and ClpX molecular chaperones identified by limited proteolysis and deletion analysis. J Biol Chem. 276, 29420-29419. pubmed. citation

VIRGINIA CORNISH

Virginia Cornish
Postdoc (1996-1999)
Email (vc114 at columbia.edu)

Faculty
Columbia University in the City of New York

Lin, H., Abida, W.A., Sauer, R.T. & Cornish, V.W. (2000) Dexamethasone-Methotrexate: An Efficient Chemical Inducer of Protein Dimerization In Vivo. J. Amer. Chem. Soc. 122, 4247-4248. pubmed. citation

PETER CHIVERS

Peter Chivers
Postdoc (1996-2003)
Email (chivers at wustl.edu)

Faculty
Washington University in St. Louis

Chivers, P.T. & Sauer, R.T. (2002) NikR repressor: high-affinity nickel binding to the C-terminal domain regulates binding to operator DNA. Chem. & Biol. 9, 1141-1148. pubmed. citation

Chivers, P.T. & Sauer, R.T. (2000) Regulation of High-Affinity Nickel Uptake in Bacteria: Ni2+-Dependent Interaction of NikR with Wild-type and Mutant Operator Sites. J. Biol. Chem. 275, 19735-19741. pubmed. citation

Chivers, P.T. & Sauer, R.T. (1999) NikR is a ribbon-helix-helix DNA-binding protein. Protein Science 8, 2494-2500. pubmed. citation

NATHAN WALSH

Nate Walsh
Graduate Student (1996-2002)
Email (nwalsh at ensemblediscovery.com)

Senior Informatics Scientist
Ensemble Discovery Corporation

Cordes, M.H.J., Burton, R.E., Walsh, N.P., McKnight, C.J. & Sauer, R.T. (2000) An Evolutionary Bridge to a New Protein Fold. Nature Structural Biology 7, 1129-1132. pubmed. citation

Cordes, M.J., Walsh, N., McKnight, J. & Sauer, R.T. (1999) Evolution of a Protein Fold In Vitro. Science 284, 325-327. pubmed. citation

Levchenko, I., Smith, C.K., Walsh, N.P., Sauer, R.T. & Baker, T.A. (1997) PDZ-like Domains Mediate Binding Specificity in the Clp/Hsp100 Family of Chaperones and Protease Regulatory Subunits. Cell 91, 939-947. pubmed. citation

ERIC ROCHE

Eric Roche
Graduate Student (1995-2001)
Email (eric.roche at healthpoint.com)

Biology Scientist
DFB Pharmaceuticals

Roche, E.D. & Sauer, R.T. (2001) Identification of endogenous SsrA-tagged proteins reveals tagging at positions corresponding to stop codons. J. Biol Chem. 276, 28509-28515. pubmed. citation

Karzai, A.W., Roche, E.D. & Sauer, R.T. (2000) The SsrA-SmpB System for Protein Tagging, Directed Degradation, and Ribosome Rescue. Nature Structural Biology 7, 449-455. pubmed. citation

Roche, E.D. & Sauer, R.T. (1999) SsrA-mediated Tagging Caused by Rare Codons and tRNA Scarcity. EMBO J. 18, 4579-4589. pubmed. citation

Gottesman, S., Roche, E., Zhou, Y.N., & Sauer, R.T. (1998) The ClpXP and ClpAP proteases degrade proteins with C-terminal peptide tails added by the SsrA tagging system. Genes & Development 12, 1338-1347. pubmed. citation

ALOK SRIVASTAVA

Alok Srivastava
Graduate Student (1995-2002)
Email (alok.srivastava at gmail.com)

Nidaan, Inc.

Srivastava, A.K., & Sauer, R.T. (2002) Mutational Studies of Protein Stability and Folding of the Hyperstable MYL Arc Repressor Variant. Biophys.Chem. pubmed. citation

Srivastava, A.K. & Sauer, R.T. (2000) Evidence for Partial Secondary Structure Formation in the Transition State for Arc Repressor Refolding and Dimerization. Biochemistry 39, 8308-8314. pubmed. citation

WALI KARZAI

Wali Karzai
Postdoc (1995-2001)
Email (akarzai at ms.cc.sunysb.edu)

Faculty
State University of New York

Barends, S., Karzai, A.W., Sauer, R.T., Wower, J. & Kraal, B. (2001) Simultaneous and Functional Binding of SmpB and EF-TU to the Alanyl Acceptor Arm of tmRNA. J. Mol. Biol. 314, 9-21. pubmed. citation

Karzai, A.W. & Sauer, R.T. (2001) Protein Factors Associated with the SsrA•SmpB Tagging and Ribosome Rescue Complex. Proc. Natl. Acad. Sci. USA 98, 3040-3044. pubmed. citation

Karzai, A.W., Roche, E.D. & Sauer, R.T. (2000) The SsrA-SmpB System for Protein Tagging, Directed Degradation, and Ribosome Rescue. Nature Structural Biology 7, 449-455. pubmed. citation

Karzai, A.W. & Sauer, R.T. (1999) SmpB, A Unique RNA-Binding Protein Essential for the Peptide-Tagging Activity of SsrA (tmRNA). EMBO J. 18, 3793-3799. pubmed. citation

Schildbach, J.F., Karzai, A.W., Raumann, B.E. & Sauer, R.T. (1999) Origins of DNA Binding Specificity: Role of Protein Contacts with the DNA Backbone. Proc. Nat. Acad. Sci. USA 96, 811-817. pubmed. citation

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