Tania A. Baker

Tania A. Baker

E. C. Whitehead Professor of Biology; Investigator, Howard Hughes Medical Institute

Tania Baker’s current research explores mechanisms and regulation of enzyme-catalyzed protein unfolding, ATP-dependent protein degradation, and remodeling of the proteome during cellular stress responses.



Gina Lee



Assistant Phone


  • PhD, 1988, Stanford University
  • BS, 1983, Biochemistry, University of Wisconsin-Madison

Research Summary

Our goal is to understand the mechanisms and regulation behind AAA+ unfoldases and macromolecular machines from the "Clp/Hsp100 family" of protein unfolding enzymes.  We study these biological catalysts using biochemistry, structural biology, molecular biology, genetics, and single molecule biophysics.


  • Margaret MacVicar Faculty Fellow, 2008-2018
  • National Academy of Sciences, Member, 2007
  • American Academy of Arts and Sciences, Fellow, 2005
  • Howard Hughes Medical Institute, HHMI Investigator, 1994

Key Publications

  1. Structural Basis of an N-Degron Adaptor with More Stringent Specificity. Stein, BJ, Grant, RA, Sauer, RT, Baker, TA. 2016. Structure 24, 232-42.
    doi: 10.1016/j.str.2015.12.008PMID:26805523
  2. Mitochondrial ClpX Activates a Key Enzyme for Heme Biosynthesis and Erythropoiesis. Kardon, JR, Yien, YY, Huston, NC, Branco, DS, Hildick-Smith, GJ, Rhee, KY, Paw, BH, Baker, TA. 2015. Cell 161, 858-67.
    doi: 10.1016/j.cell.2015.04.017PMID:25957689
  3. Mechanochemical basis of protein degradation by a double-ring AAA+ machine. Olivares, AO, Nager, AR, Iosefson, O, Sauer, RT, Baker, TA. 2014. Nat Struct Mol Biol 21, 871-5.
    doi: 10.1038/nsmb.2885PMID:25195048
  4. Single-molecule protein unfolding and translocation by an ATP-fueled proteolytic machine. Aubin-Tam, ME, Olivares, AO, Sauer, RT, Baker, TA, Lang, MJ. 2011. Cell 145, 257-67.
    doi: 10.1016/j.cell.2011.03.036PMID:21496645
  5. The molecular basis of N-end rule recognition. Wang, KH, Roman-Hernandez, G, Grant, RA, Sauer, RT, Baker, TA. 2008. Mol Cell 32, 406-14.
    doi: 10.1016/j.molcel.2008.08.032PMID:18995838
  6. Proteomic discovery of cellular substrates of the ClpXP protease reveals five classes of ClpX-recognition signals. Flynn, JM, Neher, SB, Kim, YI, Sauer, RT, Baker, TA. 2003. Mol Cell 11, 671-83.
    doi: 10.1016/s1097-2765(03)00060-1PMID:12667450
  7. A specificity-enhancing factor for the ClpXP degradation machine. Levchenko, I, Seidel, M, Sauer, RT, Baker, TA. 2000. Science 289, 2354-6.
    doi: 10.1126/science.289.5488.2354PMID:11009422

Recent Publications

  1. Structural basis of ClpXP recognition and unfolding of ssrA-tagged substrates. Fei, X, Bell, TA, Barkow, SR, Baker, TA, Sauer, RT. 2020. Elife 9, .
    doi: 10.7554/eLife.61496PMID:33089779
  2. Modular and coordinated activity of AAA+ active sites in the double-ring ClpA unfoldase of the ClpAP protease. Zuromski, KL, Sauer, RT, Baker, TA. 2020. Proc Natl Acad Sci U S A 117, 25455-25463.
    doi: 10.1073/pnas.2014407117PMID:33020301
  3. The Intrinsically Disordered N-terminal Extension of the ClpS Adaptor Reprograms Its Partner AAA+ ClpAP Protease. Torres-Delgado, A, Kotamarthi, HC, Sauer, RT, Baker, TA. 2020. J Mol Biol 432, 4908-4921.
    doi: 10.1016/j.jmb.2020.07.007PMID:32687854
  4. Regulation of Antimycin Biosynthesis Is Controlled by the ClpXP Protease. Bilyk, B, Kim, S, Fazal, A, Baker, TA, Seipke, RF. 2020. mSphere 5, .
    doi: 10.1128/mSphere.00144-20PMID:32269155
  5. Structures of the ATP-fueled ClpXP proteolytic machine bound to protein substrate. Fei, X, Bell, TA, Jenni, S, Stinson, BM, Baker, TA, Harrison, SC, Sauer, RT. 2020. Elife 9, .
    doi: 10.7554/eLife.52774PMID:32108573
  6. The Non-dominant AAA+ Ring in the ClpAP Protease Functions as an Anti-stalling Motor to Accelerate Protein Unfolding and Translocation. Kotamarthi, HC, Sauer, RT, Baker, TA. 2020. Cell Rep 30, 2644-2654.e3.
    doi: 10.1016/j.celrep.2020.01.110PMID:32101742
  7. Mitochondrial ClpX activates an essential biosynthetic enzyme through partial unfolding. Kardon, JR, Moroco, JA, Engen, JR, Baker, TA. 2020. Elife 9, .
    doi: 10.7554/eLife.54387PMID:32091391
  8. Interactions between a subset of substrate side chains and AAA+ motor pore loops determine grip during protein unfolding. Bell, TA, Baker, TA, Sauer, RT. 2019. Elife 8, .
    doi: 10.7554/eLife.46808PMID:31251172
  9. Roles of the ClpX IGF loops in ClpP association, dissociation, and protein degradation. Amor, AJ, Schmitz, KR, Baker, TA, Sauer, RT. 2019. Protein Sci 28, 756-765.
    doi: 10.1002/pro.3590PMID:30767302
  10. N domain of the Lon AAA+ protease controls assembly and substrate choice. Brown, BL, Vieux, EF, Kalastavadi, T, Kim, S, Chen, JZ, Baker, TA. 2019. Protein Sci 28, 1239-1251.
    doi: 10.1002/pro.3553PMID:30461098
More Publications