Bradley L. Pentelute

Last updated
Bradley L. Pentelute
Born (1977-12-05) December 5, 1977 (age 47)
Education University of Southern California (USC) (B.A., Psychology, B.S., Chemistry)

University of Chicago (M.S., Chemistry, Ph.D., Organic Chemistry)

Contents

Harvard Medical School (Fellowship)
OccupationProfessor of Chemistry at Massachusetts Institute of Technology(MIT)
Known forAutomated flow peptide synthesis

Pi-clamp bioconjugation mechanism

Anthrax toxin delivery system

Xenoprotein engineering

Affinity selection-mass spectrometry
AwardsCollier Award

Damon Runyon-Rachleff Innovation Award

Sontag Distinguished Scientist Award

NSF CAREER Award

Sloan Research Fellowship

Amgen Young Investigator Award

Eli Lilly Award
Website http://www.pentelutelabmit.com/

Bradley Lether Pentelute (born December 5, 1977) is currently a professor of chemistry at the Massachusetts Institute of Technology (MIT). His research program lies at the intersection of chemistry and biology and develops bioconjugation strategies, cytosolic delivery platforms, and rapid flow synthesis technologies to optimize the production, achieve site-specific modification, enhance stability, and modulate function of a variety of bioactive agents. His laboratory successfully modified proteins via cysteine-containing “pi-clamps” made up of a short sequence of amino acids, and delivered large biomolecules, such as various proteins and drugs, into cells via the anthrax delivery vehicle. [1] Pentelute has also made several key contributions to automated synthesis technologies in flow. These advances includes the invention of the world's fastest polypeptide synthesizer. [2] [3] This system is able to form amide bonds at a more efficient rate than standard commercial equipment and has helped in the process of understanding protein folding and its mechanisms. This automated flow technology was recently used to achieve total chemical synthesis of protein chains up to 164 amino acids in length that retained the structure and function of native variants obtained by recombinant expression. [4] [5] The primary goal of his endeavor is to use these processes to create designer biologics that can be used to treat diseases and solve the manufacturing problem for on-demand personalized therapies, such as cancer vaccines. [6]

Education and career

Pentelute grew up in San Diego, California, and earned both his B.A. in Psychology and B.S. in Chemistry from the University of Southern California in 2003. He continued his studies at the University of Chicago, where he earned his M.S. and Ph.D. in chemistry in the laboratory of Stephen Kent. After receiving his Ph.D., Pentelute served as a senior scientist at Ethos Pharmaceuticals in 2008. He completed a postdoctoral fellowship at Harvard Medical School from 2008 to 2011 with R. John Collier in Microbiology. In 2011, Pentelute began his assistant professorship at the Massachusetts Institute of Technology (MIT), was awarded tenure in 2017 [7] and promoted to Professor of Chemistry in 2021. [8] [9]

Research

Automated fast-flow synthesis of biopolymers

The Pentelute laboratory designs fully automated fast-flow machines to accelerate the chemical manufacture of sequence-defined biopolymers. It has built an efficient machine that can produce amide bonds an order of magnitude faster than commercially available instruments. The machine is inspired by Nature's ribosome that can make proteins in minutes. While the Pentelute group's fast-flow technology is not as fast as the ribosome, it can form one amide bond in 7 seconds. [3] This technology not only facilitates rapid polypeptide generation but it has enabled the group to carry out entire D-scans of proteins to investigate folding and functions. This technology was used to achieve stepwise total chemical synthesis of functional protein chains [5] and was adapted to produce phosphorodiamidate morpholino oligomers (PMO) in flow. [10] Automated flow technology may be used to solve the manufacturing problem for on-demand personalized therapies, such as cancer vaccines, [11] and to design engineered biologics, such as dimeric transcription factor mimetics. [12] [13]

Pi-clamp bioconjugation

A reagent binding to the cysteine site of an amino acid sequence (pi-clamp) to modify the protein's structure Pi-clamp.png
A reagent binding to the cysteine site of an amino acid sequence (pi-clamp) to modify the protein's structure

Selecting a cellular site and modifying its characteristics to perform specific functions is one of the most complex studies done in chemistry. Typical modification techniques involved using a catalyst or reaction pairs to change a site of interest. Cysteine residues were used in modifying proteins via bioconjugation because they acted as natural catalysts, however they lacked the ability to target specific sites. Pentelute was inspired to create a new site-selecting approach by altering an amino acid's environment in a peptide sequence. Hence, Pentelute and his lab created an amino acid sequence consisting of phenylalanine, cysteine, proline, and phenylalanine, known as the pi-clamp, to selectively modify a cysteine site in proteins. Having been made from natural compounds, the pi-clamp reacts with a perfluoroaromatic reagent and the cysteine thiol site, thus causing an overall decrease in the reaction's activation energy. Additional advantages of this pi-clamping technique compared to non-natural methods include the clamp being of small size and being able to have direct interaction with the site. This new approach for modification of cells helped researchers target site-specific cells and label proteins without the use of enzymes, which makes the modification process more efficient. A significant use of this method has been applied through the successful killing of breast cancer cells. [14] [15]

Anthrax toxin delivery

Moving peptide and protein therapeutics through the plasma membrane of cells has been made more efficient through the use of a platform made from the anthrax lethal toxin (PA/LFN), which arises from the bacterium Bacillus anthracis. [16] Pentelute's lab took more than two decades to develop this delivery vehicle. His studies of intracellular delivery help us understand the movements of proteins and to explore different biological functions within cells. Previous techniques to transport molecules through the plasma membrane of mammalian cells proved to be less effective and required higher concentrations of substance to be useful. When compared, the anthrax lethal toxin based delivery method was proved to transport proteins faster and more efficiently. Through the use of chemical ligation (NCL) and enzyme-mediated ligation using Sortase A (SrtA), non-native cargos that contain functionalities that don't naturally occur can be created that provide benefits such as increased stability to internal degradation of the cell, added use of affinity handles, and adjusted connective affinities to target molecules. These fusions also attach the resulting peptides to the N-terminus of the native lethal factor (LFN). [17] [15]

Awards and honors

Source: [9]

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References

  1. ↑ "Brad Pentelute: In search of novel proteins". MIT News. Retrieved 2018-11-29.
  2. ↑ "New technology offers fast peptide synthesis". MIT News. Retrieved 2018-11-29.
  3. 1 2 Mijalis, Alexander J; Thomas, Dale A; Simon, Mark D; Adamo, Andrea; Beaumont, Ryan; Jensen, Klavs F; Pentelute, Bradley L (2017-02-28). "A fully automated flow-based approach for accelerated peptide synthesis". Nature Chemical Biology. 13 (5): 464–466. doi:10.1038/nchembio.2318. ISSN   1552-4450. PMID   28244989.
  4. ↑ "New technology enables fast protein synthesis". MIT News. Retrieved 2021-09-23.
  5. 1 2 Hartrampf, Nina; Saebi, Azin; Poskus, Mackenzie; Gates, Zachary P; Callahan, Alex J; Cowfer, Amanda E; Hanna, Stephanie; Antilla, Sarah; Schissel, Carly K; Quartararo, Anthony J; Ye, Xiyun; Mijalis, Alexander J; Simon, Mark D; Loas, Andrei; Liu, Shunying; Jessen, Carsten; Nielsen, Thomas E; Pentelute, Bradley L (2020-05-29). "Synthesis of proteins by automated flow chemistry". Science. 368 (6494): 980–987. doi:10.1126/science.abb2491. hdl: 1721.1/128762 . PMID   32467387. S2CID   218983036.
  6. ↑ "Pentelute Lab MIT | Pentelute Lab MIT - Research Page". www.pentelutelabmit.com. Retrieved 2018-11-29.
  7. ↑ "School of Science professors granted tenure". MIT News. Retrieved 2021-09-23.
  8. ↑ "Pentelute and Zhang Earn Promotions". MIT Chemistry News. Retrieved 2021-09-23.
  9. 1 2 http://www.pentelutelabmit.com/wp-content/uploads/2021/09/Pentelute-CV-09-15-2021_short.pdf [ bare URL PDF ]
  10. ↑ Li, Chengxi; Callahan, Alex J; Simon, Mark D; Totaro, Kyle A; Mijalis, Alexander J; Phadke, Kruttika S; Zhang, Genwei; Hartrampf, Nina; Schissel, Carly K; Zhou, Ming; Zong, Hong; Hanson, Gunnar J; Loas, Andrei; Pohl, Nicola LB; Verhoeven, David E; Pentelute, Bradley L (2021-07-20). "Fully automated fast-flow synthesis of antisense phosphorodiamidate morpholino oligomers". Nature Communications. 12 (1): 4396. Bibcode:2021NatCo..12.4396L. doi:10.1038/s41467-021-24598-4. PMC   8292409 . PMID   34285203.
  11. ↑ Truex, Nicholas L; Holden, Rebecca L; Wang, Bin-You; Chen, Pu-Guang; Hanna, Stephanie; Hu, Zhuting; Shetty, Keerthi; Olive, Oriol; Neuberg, Donna; Hacohen, Nir; Keskin, Derin B; Ott, Patrick A; Wu, Catherine J; Pentelute, Bradley L (2020-01-20). "Automated Flow Synthesis of Tumor Neoantigen Peptides for Personalized Immunotherapy". Scientific Reports. 10 (1): 723. Bibcode:2020NatSR..10..723T. doi:10.1038/s41598-019-56943-5. PMC   6971261 . PMID   31959774.
  12. ↑ Jbara, Muhammad; Pomplun, Sebastian; Schissel, Carly K; Wilson Hawken, Susana; Boija, Ann; Klein, Isaac; Rodriguez, Jacob; Buchwald, Stephen L; Pentelute, Bradley L (2021-08-04). "Engineering Bioactive Dimeric Transcription Factor Analogs via Palladium Rebound Reagents". Journal of the American Chemical Society. 143 (30): 11788–11798. doi:10.1021/jacs.1c05666. PMID   34289685. S2CID   236174790.
  13. ↑ Pomplun, Sebastian; Jbara, Muhammad; Schissel, Carly K; Wilson Hawken, Susana; Boija, Ann; Li, Charles; Klein, Isaac; Pentelute, Bradley L (2021-08-25). "Parallel Automated Flow Synthesis of Covalent Protein Complexes That Can Inhibit MYC-Driven Transcription". ACS Central Science. 7 (8): 1408–1418. doi:10.1021/acscentsci.1c00663. PMC   8393199 . PMID   34471684.
  14. ↑ Zhang, Chi; Welborn, Matthew; Zhu, Tianyu; Yang, Nicole J.; Santos, Michael S.; Van Voorhis, Troy; Pentelute, Bradley L. (2015-12-21). "π-Clamp-mediated cysteine conjugation". Nature Chemistry. 8 (2): 120–128. doi:10.1038/nchem.2413. ISSN   1755-4330. PMC   4861612 . PMID   26791894.
  15. 1 2 "Bradley L. Pentelute – MIT Department of Chemistry". chemistry.mit.edu. Retrieved 2018-11-30.
  16. ↑ Jiang, Jiansen; Pentelute, Bradley L.; Collier, R. John; Zhou, Z. Hong (2015-03-16). "Atomic structure of anthrax protective antigen pore elucidates toxin translocation". Nature. 521 (7553): 545–549. Bibcode:2015Natur.521..545J. doi:10.1038/nature14247. hdl:1721.1/108165. ISSN   0028-0836. PMC   4519040 . PMID   25778700.
  17. ↑ Rabideau, Amy E.; Pentelute, Bradley Lether (2016-05-02). "Delivery of Non-Native Cargo into Mammalian Cells Using Anthrax Lethal Toxin". ACS Chemical Biology. 11 (6): 1490–1501. doi:10.1021/acschembio.6b00169. ISSN   1554-8929. PMID   27055654. S2CID   4839173.
  18. ↑ "Become a Renaissance Scholar". Academic Honors and Fellowships. 2015-07-06. Retrieved 2018-11-30.
  19. ↑ "Australian Peptide Association » *Oz Peptides". www.ozpeptide.org. Retrieved 2018-11-30.
  20. ↑ "2010 Microbial Toxins and Pathogenicity Conference GRC". www.grc.org. Retrieved 2018-11-30.
  21. ↑ "Welcome | The Vallee Foundation". www.thevalleefoundation.org. Retrieved 2018-11-30.
  22. ↑ "Damon Runyon-Rachleff Innovation Award Overview | Damon Runyon". www.damonrunyon.org. Retrieved 2018-11-30.
  23. ↑ "ICBS Young Chemical Biologist Awards - International Chemical Biology Society". www.chemical-biology.org. Retrieved 2018-11-30.
  24. ↑ "International Chemical Biology Society". www.chemical-biology.org. Retrieved 2018-11-30.
  25. ↑ "Bradley L. Pentelute". www.sontagfoundation.org. Retrieved 2018-11-30.
  26. ↑ "NSF Award Search: Award#1351807 - CAREER: Using chemistry to probe anthrax toxin protein translocation". www.nsf.gov. Retrieved 2018-11-30.
  27. ↑ "Sloan Research Fellowships". sloan.org. Retrieved 2018-11-30.
  28. ↑ "Novartis Early Career Award: B. L. Pentelute and J. A. Prescher / Biotrans Award: W. Kroutil / Carus Medal: H. J. Wörner". Angewandte Chemie International Edition. 54 (50): 15012. 2015-10-29. doi:10.1002/anie.201509775. ISSN   1433-7851.
  29. ↑ "Recipients | ACS Division of Biological Chemistry Website". www.divbiolchem.org. Archived from the original on 2019-04-23. Retrieved 2018-11-30.
  30. ↑ "Eli Lilly Award in Biological Chemistry - American Chemical Society". American Chemical Society. Retrieved 2018-11-30.
  31. ↑ "Brad Pentelute receives 2021 Rao Makineni Lectureship". MIT Chemistry News. Retrieved 2021-09-23.
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