Joanne Engel, MD, PhD

Title(s)Professor, Medicine
SchoolSchool of Medicine
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    Collapse Biography 
    Collapse Education and Training
    University of California, San Francisco, San FranciscoClinical and postdoctoral fellowship1990Infectious Disease
    University of Pennsylvania, Philadelphia, PAResidency 1986Internal Medicine
    Stanford University, Stanford, CAM.D., PH.D.1983School of Medicine

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    My lab is interested in the complex interplay between bacterial pathogens and host cells. In particular, we study two important human pathogens, Chlamydia trachomatis and Pseudomonas aeruginosa. Our strengths include using multidisciplinary approaches to these studies—allowing the pathogen to be our tutor. We have utilized bacterial genetics and genetic screens, molecular biology, cellular microbiology, host cell biology with advanced immunofluorescence microscopy, genome-wide RNAi screens, bioinformatics, and proteomics to rigorously understand the mechanisms by which they subvert host cell functions to cause disease. Seminal contributions that our group has made to the study of P. aeruginosa-host interactions is (i) the discovery of the P. aeruginosa type III secretion system and one of the secreted effectors ExoU and the demonstration that the P. aeruginosa type III secretion system is important for virulence in cell-culture, mouse, and human infections (ii) demonstrating that the type III secreted toxin ExoT inhibits wound repair through redundant pathways (iii) elucidation of the pathway by which P. aeruginosa can be internalized by non-phagocytic cells and how the type III secretion system-encoded effectors modulate entry (iv) characterization of novel genes involved in type IV pilin biogenesis and in the regulation of diverse virulence pathways (v) the first identification of a host cell ubiquitin ligase (cbl-b) that specifically targets the degradation of a type III secreted factor (vii) development of 2D and 3D cell-culture based systems to dissect the interaction of pathogens with the apical versus basolateral surface of polarized epithelial cells (vi) discovery that upon binding to the apical surface of polarized epithelial cells, P. aeruginosa forms biofilm-like structures that are able to transform apical membrane into basolateral membrane by exploiting the phosphatidyl inositol kinase pathway to form membrane protrusions that are associated with a spatial and temporal activation of the innate immune response. Our current studies focus on the dissection of the Chp/Vfr/ regulatory pathway that regulates diverse virulence factor circuits in P. aeruginosa in determining the bacterial and host determinants involved in the formation of biofilms and spatially localized activation of the innate immune response at the apical surface of tissues. In our studies on the pathogenesis of chlamydial infections, we have focused on host cell biology and genome-wide RNA-based screens to understanding how C. trachomatis modulates host cell signaling systems to bind, enter, and establish a replicative niche. We have carried out a genome wide RNAi screen in a simple genetic host and have identified new host molecules that are involved in binding, entry, and establishment of a unique intracellular niche. We have discovered a potential role for host growth factors in binding and entry and elucidated a novel pathway by which this organism acquires sphingolipids from the host. We have complemented these studies with state of the art confocal microscopy to begin to elucidate the bacterial and host determinants and mechanism of vacuole fusion. We are currently carrying out high throughput proteomics to dissect the function of the approximately 150 proteins that Chlamydia inject into the host cell to create a unique replicative niche and to escape the innate immune response.

    Collapse Research 
    Collapse Research Activities and Funding
    Adapting to a changing environment: How surface contact induces virulence factor production in Pseudomonas aeruginosa
    NIH/NIAID R01AI129547Aug 1, 2017 - Jul 31, 2021
    Role: Principal Investigator
    Decoding the Chlamydia inclusion membrane protein-host protein interactome
    NIH/NIAID R01AI122747Dec 1, 2015 - Nov 30, 2020
    Role: Principal Investigator
    High throughput proteomics to dissect Chlamydia-host cell interactions
    NIH/NIAID R21AI105561Sep 17, 2013 - Aug 31, 2015
    Role: Principal Investigator
    Proteomic approach to identify mediators of PI3K activation by P. aeruginosa
    NIH/FIC R03TW008056Apr 1, 2008 - Mar 31, 2012
    Role: Principal Investigator
    Novel approaches to identify host genes required for Chlamydia pathogenesis
    NIH/NIAID R01AI073770Apr 15, 2007 - Aug 31, 2017
    Role: Principal Investigator
    New approaches to study Pseudomonas-host interactions
    NIH/NIAID R56AI065902May 1, 2005 - Jul 31, 2016
    Role: Principal Investigator
    New approaches to study Pseudomonas-host interactions
    NIH/NIAID R01AI065902May 1, 2005 - May 31, 2014
    Role: Principal Investigator
    New approaches to studying host-chlamydia interactions
    NIH/NIAID R21AI062768Apr 1, 2005 - Mar 31, 2007
    Role: Principal Investigator
    Microbial Pathogenesis and Host Defense
    NIH/NIAID T32AI060537Aug 1, 2004 - Jul 31, 2024
    Role: Principal Investigator
    Mucosal Immune Barrier in Infection and Immunity
    NIH/NIAID P01AI053194Sep 30, 2002 - Aug 31, 2014
    Role: Co-Investigator
    NIH/NIAID R01AI044148Feb 1, 2000 - Jan 31, 2006
    Role: Principal Investigator
    Mechanism of Pseudomonas-mediated epithelial cell damage
    NIH/NIAID R01AI042806Jun 1, 1998 - Apr 30, 2012
    Role: Principal Investigator
    Comprehensive Biology: Exploiting the Yeast Genome
    NIH P41RR011823Sep 30, 1996 - Jun 30, 2016
    Role: Co-Investigator
    NIH/NIAID R21AI038271Sep 1, 1996 - Oct 31, 1997
    Role: Principal Investigator
    NIH/NIAID K04AI001348Jun 1, 1996 - May 31, 2001
    Role: Principal Investigator
    NIH/NIAID R01AI024436Feb 1, 1988 - Jan 31, 2002
    Role: Principal Investigator

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    Collapse Bibliographic 
    Collapse Publications
    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help.
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    1. Peters JM, Koo BM, Patino R, Heussler GE, Hearne CC, Qu J, Inclan YF, Hawkins JS, Lu CHS, Silvis MR, Harden MM, Osadnik H, Peters JE, Engel JN, Dutton RJ, Grossman AD, Gross CA, Rosenberg OS. Enabling genetic analysis of diverse bacteria with Mobile-CRISPRi. Nat Microbiol. 2019 Feb; 4(2):244-250. PMID: 30617347.
      View in: PubMed
    2. Kumagai K, Elwell CA, Ando S, Engel JN, Hanada K. Both the N- and C- terminal regions of the Chlamydial inclusion protein D (IncD) are required for interaction with the pleckstrin homology domain of the ceramide transport protein CERT. Biochem Biophys Res Commun. 2018 Nov 10; 505(4):1070-1076. PMID: 30314703.
      View in: PubMed
    3. Ruch TR, Engel JN. Targeting the Mucosal Barrier: How Pathogens Modulate the Cellular Polarity Network. Cold Spring Harb Perspect Biol. 2017 Jun 01; 9(6). PMID: 28193722.
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    4. Elwell CA, Czudnochowski N, von Dollen J, Johnson JR, Nakagawa R, Mirrashidi K, Krogan NJ, Engel JN, Rosenberg OS. Chlamydia interfere with an interaction between the mannose-6-phosphate receptor and sorting nexins to counteract host restriction. Elife. 2017 03 02; 6. PMID: 28252385.
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    5. Duncan MC, Herrera NG, Johnson KS, Engel JN, Auerbuch V. Bacterial internalization is required to trigger NIK-dependent NF-?B activation in response to the bacterial type three secretion system. PLoS One. 2017; 12(2):e0171406. PMID: 28166267.
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    6. Ruch TR, Bryant DM, Mostov KE, Engel JN. Par3 integrates Tiam1 and phosphatidylinositol 3-kinase signaling to change apical membrane identity. Mol Biol Cell. 2017 01 15; 28(2):252-260. PMID: 27881661.
      View in: PubMed
    7. Inclan YF, Persat A, Greninger A, Von Dollen J, Johnson J, Krogan N, Gitai Z, Engel JN. A scaffold protein connects type IV pili with the Chp chemosensory system to mediate activation of virulence signaling in Pseudomonas aeruginosa. Mol Microbiol. 2016 08; 101(4):590-605. PMID: 27145134; PMCID: PMC4980298 [Available on 08/01/17].
    8. Elwell C, Mirrashidi K, Engel J. Chlamydia cell biology and pathogenesis. Nat Rev Microbiol. 2016 06; 14(6):385-400. PMID: 27108705; PMCID: PMC4886739.
    9. Mirrashidi KM, Elwell CA, Verschueren E, Johnson JR, Frando A, Von Dollen J, Rosenberg O, Gulbahce N, Jang G, Johnson T, Jäger S, Gopalakrishnan AM, Sherry J, Dunn JD, Olive A, Penn B, Shales M, Cox JS, Starnbach MN, Derre I, Valdivia R, Krogan NJ, Engel J. Global Mapping of the Inc-Human Interactome Reveals that Retromer Restricts Chlamydia Infection. Cell Host Microbe. 2015 Jul 08; 18(1):109-21. PMID: 26118995; PMCID: PMC4540348.
    10. Persat A, Inclan YF, Engel JN, Stone HA, Gitai Z. Type IV pili mechanochemically regulate virulence factors in Pseudomonas aeruginosa. Proc Natl Acad Sci U S A. 2015 Jun 16; 112(24):7563-8. PMID: 26041805.
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    11. Tran CS, Rangel SM, Almblad H, Kierbel A, Givskov M, Tolker-Nielsen T, Hauser AR, Engel JN. The Pseudomonas aeruginosa type III translocon is required for biofilm formation at the epithelial barrier. PLoS Pathog. 2014 Nov; 10(11):e1004479. PMID: 25375398.
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    12. Tran CS, Eran Y, Ruch TR, Bryant DM, Datta A, Brakeman P, Kierbel A, Wittmann T, Metzger RJ, Mostov KE, Engel JN. Host cell polarity proteins participate in innate immunity to Pseudomonas aeruginosa infection. Cell Host Microbe. 2014 May 14; 15(5):636-43. PMID: 24832456.
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    13. Bucior I, Abbott J, Song Y, Matthay MA, Engel JN. Sugar administration is an effective adjunctive therapy in the treatment of Pseudomonas aeruginosa pneumonia. Am J Physiol Lung Cell Mol Physiol. 2013 Sep; 305(5):L352-63. PMID: 23792737; PMCID: PMC3763031.
    14. Bastidas RJ, Elwell CA, Engel JN, Valdivia RH. Chlamydial intracellular survival strategies. Cold Spring Harb Perspect Med. 2013 May 01; 3(5):a010256. PMID: 23637308; PMCID: PMC3633179.
    15. Kim JH, Chan C, Elwell C, Singer MS, Dierks T, Lemjabbar-Alaoui H, Rosen SD, Engel JN. Endosulfatases SULF1 and SULF2 limit Chlamydia muridarum infection. Cell Microbiol. 2013 Sep; 15(9):1560-71. PMID: 23480519.
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    16. Elwell CA, Engel JN. Lipid acquisition by intracellular Chlamydiae. Cell Microbiol. 2012 Jul; 14(7):1010-8. PMID: 22452394; PMCID: PMC3376245.
    17. Bucior I, Pielage JF, Engel JN. Pseudomonas aeruginosa pili and flagella mediate distinct binding and signaling events at the apical and basolateral surface of airway epithelium. PLoS Pathog. 2012; 8(4):e1002616. PMID: 22496644; PMCID: PMC3320588.
    18. Kim JH, Jiang S, Elwell CA, Engel JN. Chlamydia trachomatis co-opts the FGF2 signaling pathway to enhance infection. PLoS Pathog. 2011 Oct; 7(10):e1002285. PMID: 21998584; PMCID: PMC3188521.
    19. Elwell CA, Jiang S, Kim JH, Lee A, Wittmann T, Hanada K, Melancon P, Engel JN. Chlamydia trachomatis co-opts GBF1 and CERT to acquire host sphingomyelin for distinct roles during intracellular development. PLoS Pathog. 2011 Sep; 7(9):e1002198. PMID: 21909260.
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    20. Engel J, Eran Y. Subversion of mucosal barrier polarity by pseudomonas aeruginosa. Front Microbiol. 2011; 2:114. PMID: 21747810; PMCID: PMC3129012.
    21. Elwell CA, Kierbel A, Engel JN. Species-specific interactions of Src family tyrosine kinases regulate Chlamydia intracellular growth and trafficking. MBio. 2011; 2(3):e00082-11. PMID: 21586644.
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    22. Wood S, Sivaramakrishnan G, Engel J, Shafikhani SH. Cell migration regulates the kinetics of cytokinesis. Cell Cycle. 2011 Feb 15; 10(4):648-54. PMID: 21293189; PMCID: PMC3174005.
    23. Inclan YF, Huseby MJ, Engel JN. FimL regulates cAMP synthesis in Pseudomonas aeruginosa. PLoS One. 2011 Jan 11; 6(1):e15867. PMID: 21264306; PMCID: PMC3019171.
    24. Bucior I, Mostov K, Engel JN. Pseudomonas aeruginosa-mediated damage requires distinct receptors at the apical and basolateral surfaces of the polarized epithelium. Infect Immun. 2010 Mar; 78(3):939-53. PMID: 20008530; PMCID: PMC2825949.
    25. Bertrand JJ, West JT, Engel JN. Genetic analysis of the regulation of type IV pilus function by the Chp chemosensory system of Pseudomonas aeruginosa. J Bacteriol. 2010 Feb; 192(4):994-1010. PMID: 20008072.
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    26. Endoh T, Engel JN. CbpA: a polarly localized novel cyclic AMP-binding protein in Pseudomonas aeruginosa. J Bacteriol. 2009 Dec; 191(23):7193-205. PMID: 19801409.
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    27. Engel J, Balachandran P. Role of Pseudomonas aeruginosa type III effectors in disease. Curr Opin Microbiol. 2009 Feb; 12(1):61-6. PMID: 19168385.
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    28. Shafikhani SH, Mostov K, Engel J. Focal adhesion components are essential for mammalian cell cytokinesis. Cell Cycle. 2008 Sep 15; 7(18):2868-76. PMID: 18787414; PMCID: PMC2745397.
    29. Barken KB, Pamp SJ, Yang L, Gjermansen M, Bertrand JJ, Klausen M, Givskov M, Whitchurch CB, Engel JN, Tolker-Nielsen T. Roles of type IV pili, flagellum-mediated motility and extracellular DNA in the formation of mature multicellular structures in Pseudomonas aeruginosa biofilms. Environ Microbiol. 2008 Sep; 10(9):2331-43. PMID: 18485000.
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    30. Pielage JF, Powell KR, Kalman D, Engel JN. RNAi screen reveals an Abl kinase-dependent host cell pathway involved in Pseudomonas aeruginosa internalization. PLoS Pathog. 2008 Mar 21; 4(3):e1000031. PMID: 18369477; PMCID: PMC2265438.
    31. Elwell CA, Ceesay A, Kim JH, Kalman D, Engel JN. RNA interference screen identifies Abl kinase and PDGFR signaling in Chlamydia trachomatis entry. PLoS Pathog. 2008 Mar 07; 4(3):e1000021. PMID: 18369471.
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    32. Shafikhani SH, Morales C, Engel J. The Pseudomonas aeruginosa type III secreted toxin ExoT is necessary and sufficient to induce apoptosis in epithelial cells. Cell Microbiol. 2008 Apr; 10(4):994-1007. PMID: 18053004.
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    33. Brandt S, Shafikhani S, Balachandran P, Jin S, Hartig R, König W, Engel J, Backert S. Use of a novel coinfection system reveals a role for Rac1, H-Ras, and CrkII phosphorylation in Helicobacter pylori-induced host cell actin cytoskeletal rearrangements. FEMS Immunol Med Microbiol. 2007 Jul; 50(2):190-205. PMID: 17428306.
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    34. Kierbel A, Gassama-Diagne A, Rocha C, Radoshevich L, Olson J, Mostov K, Engel J. Pseudomonas aeruginosa exploits a PIP3-dependent pathway to transform apical into basolateral membrane. J Cell Biol. 2007 Apr 09; 177(1):21-7. PMID: 17403925; PMCID: PMC2064102.
    35. Samuel TK, Gitlin JD. Copper and nitric oxide meet in the plasma. Nat Chem Biol. 2006 Sep; 2(9):452-3. PMID: 16921354.
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    36. Elwell C, Engel JN. Drosophila melanogaster S2 cells: a model system to study Chlamydia interaction with host cells. Cell Microbiol. 2005 May; 7(5):725-39. PMID: 15839901; PMCID: PMC1236988.
    37. Agron PG, Reed SL, Engel JN. An essential, putative MEK kinase of Leishmania major. Mol Biochem Parasitol. 2005 Jul; 142(1):121-5. PMID: 15878208.
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    38. Kierbel A, Gassama-Diagne A, Mostov K, Engel JN. The phosphoinositol-3-kinase-protein kinase B/Akt pathway is critical for Pseudomonas aeruginosa strain PAK internalization. Mol Biol Cell. 2005 May; 16(5):2577-85. PMID: 15772151.
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    39. Whitchurch CB, Beatson SA, Comolli JC, Jakobsen T, Sargent JL, Bertrand JJ, West J, Klausen M, Waite LL, Kang PJ, Tolker-Nielsen T, Mattick JS, Engel JN. Pseudomonas aeruginosa fimL regulates multiple virulence functions by intersecting with Vfr-modulated pathways. Mol Microbiol. 2005 Mar; 55(5):1357-78. PMID: 15720546; PMCID: PMC1266277.
    40. Gabel BR, Elwell C, van Ijzendoorn SC, Engel JN. Lipid raft-mediated entry is not required for Chlamydia trachomatis infection of cultured epithelial cells. Infect Immun. 2004 Dec; 72(12):7367-73. PMID: 15557670; PMCID: PMC529103.
    41. Gao LY, Guo S, McLaughlin B, Morisaki H, Engel JN, Brown EJ. A mycobacterial virulence gene cluster extending RD1 is required for cytolysis, bacterial spreading and ESAT-6 secretion. Mol Microbiol. 2004 Sep; 53(6):1677-93. PMID: 15341647.
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    42. Engel J. Tarp and Arp: How Chlamydia induces its own entry. Proc Natl Acad Sci U S A. 2004 Jul 06; 101(27):9947-8. PMID: 15226494; PMCID: PMC454194.
    43. Whitchurch CB, Leech AJ, Young MD, Kennedy D, Sargent JL, Bertrand JJ, Semmler AB, Mellick AS, Martin PR, Alm RA, Hobbs M, Beatson SA, Huang B, Nguyen L, Commolli JC, Engel JN, Darzins A, Mattick JS. Characterization of a complex chemosensory signal transduction system which controls twitching motility in Pseudomonas aeruginosa. Mol Microbiol. 2004 May; 52(3):873-93. PMID: 15101991.
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    44. Garrity-Ryan L, Shafikhani S, Balachandran P, Nguyen L, Oza J, Jakobsen T, Sargent J, Fang X, Cordwell S, Matthay MA, Engel JN. The ADP ribosyltransferase domain of Pseudomonas aeruginosa ExoT contributes to its biological activities. Infect Immun. 2004 Jan; 72(1):546-58. PMID: 14688136; PMCID: PMC343945.
    45. Kazmierczak BI, Mostov K, Engel JN. Epithelial cell polarity alters Rho-GTPase responses to Pseudomonas aeruginosa. Mol Biol Cell. 2004 Feb; 15(2):411-9. PMID: 14595106.
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    46. McMorran B, Town L, Costelloe E, Palmer J, Engel J, Hume D, Wainwright B. Effector ExoU from the type III secretion system is an important modulator of gene expression in lung epithelial cells in response to Pseudomonas aeruginosa infection. Infect Immun. 2003 Oct; 71(10):6035-44. PMID: 14500525; PMCID: PMC201109.
    47. Jacob T, Lee RJ, Engel JN, Machen TE. Modulation of cytosolic Ca(2+) concentration in airway epithelial cells by Pseudomonas aeruginosa. Infect Immun. 2002 Nov; 70(11):6399-408. PMID: 12379720; PMCID: PMC130342.
    48. Kazmierczak BI, Engel JN. Pseudomonas aeruginosa ExoT acts in vivo as a GTPase-activating protein for RhoA, Rac1, and Cdc42. Infect Immun. 2002 Apr; 70(4):2198-205. PMID: 11895987; PMCID: PMC127837.
    49. Hauser AR, Cobb E, Bodi M, Mariscal D, Vallés J, Engel JN, Rello J. Type III protein secretion is associated with poor clinical outcomes in patients with ventilator-associated pneumonia caused by Pseudomonas aeruginosa. Crit Care Med. 2002 Mar; 30(3):521-8. PMID: 11990909.
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    50. Geiser TK, Kazmierczak BI, Garrity-Ryan LK, Matthay MA, Engel JN. Pseudomonas aeruginosa ExoT inhibits in vitro lung epithelial wound repair. Cell Microbiol. 2001 Apr; 3(4):223-36. PMID: 11298646.
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    51. Kazmierczak BI, Jou TS, Mostov K, Engel JN. Rho GTPase activity modulates Pseudomonas aeruginosa internalization by epithelial cells. Cell Microbiol. 2001 Feb; 3(2):85-98. PMID: 11207623.
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    52. Kazmierczak BI, Mostov K, Engel JN. Interaction of bacterial pathogens with polarized epithelium. Annu Rev Microbiol. 2001; 55:407-35. PMID: 11544362.
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    53. Garrity-Ryan L, Kazmierczak B, Kowal R, Comolli J, Hauser A, Engel JN. The arginine finger domain of ExoT contributes to actin cytoskeleton disruption and inhibition of internalization of Pseudomonas aeruginosa by epithelial cells and macrophages. Infect Immun. 2000 Dec; 68(12):7100-13. PMID: 11083836; PMCID: PMC97821.
    54. van Ooij C, Kalman L, Nishijima M, Hanada K, Mostov K, Engel JN. Host cell-derived sphingolipids are required for the intracellular growth of Chlamydia trachomatis. Cell Microbiol. 2000 Dec; 2(6):627-37. PMID: 11207614.
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    55. Stephens RS, Fawaz FS, Kennedy KA, Koshiyama K, Nichols B, van Ooij C, Engel JN. Eukaryotic cell uptake of heparin-coated microspheres: a model of host cell invasion by Chlamydia trachomatis. Infect Immun. 2000 Mar; 68(3):1080-5. PMID: 10678910; PMCID: PMC97251.
    56. Hauser AR, Engel JN. Pseudomonas aeruginosa induces type-III-secretion-mediated apoptosis of macrophages and epithelial cells. Infect Immun. 1999 Oct; 67(10):5530-7. PMID: 10496945; PMCID: PMC96920.
    57. Comolli JC, Hauser AR, Waite L, Whitchurch CB, Mattick JS, Engel JN. Pseudomonas aeruginosa gene products PilT and PilU are required for cytotoxicity in vitro and virulence in a mouse model of acute pneumonia. Infect Immun. 1999 Jul; 67(7):3625-30. PMID: 10377148; PMCID: PMC116553.
    58. Comolli JC, Waite LL, Mostov KE, Engel JN. Pili binding to asialo-GM1 on epithelial cells can mediate cytotoxicity or bacterial internalization by Pseudomonas aeruginosa. Infect Immun. 1999 Jul; 67(7):3207-14. PMID: 10377092; PMCID: PMC116497.
    59. Van Ooij C, Homola E, Kincaid E, Engel J. Fusion of Chlamydia trachomatis-containing inclusions is inhibited at low temperatures and requires bacterial protein synthesis. Infect Immun. 1998 Nov; 66(11):5364-71. PMID: 9784545; PMCID: PMC108671.
    60. Tan M, Gaal T, Gourse RL, Engel JN. Mutational analysis of the Chlamydia trachomatis rRNA P1 promoter defines four regions important for transcription in vitro. J Bacteriol. 1998 May; 180(9):2359-66. PMID: 9573186; PMCID: PMC107176.
    61. Hauser AR, Fleiszig S, Kang PJ, Mostov K, Engel JN. Defects in type III secretion correlate with internalization of Pseudomonas aeruginosa by epithelial cells. Infect Immun. 1998 Apr; 66(4):1413-20. PMID: 9529061; PMCID: PMC108068.
    62. Hauser AR, Kang PJ, Engel JN. PepA, a secreted protein of Pseudomonas aeruginosa, is necessary for cytotoxicity and virulence. Mol Microbiol. 1998 Feb; 27(4):807-18. PMID: 9515706.
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    63. Fawaz FS, van Ooij C, Homola E, Mutka SC, Engel JN. Infection with Chlamydia trachomatis alters the tyrosine phosphorylation and/or localization of several host cell proteins including cortactin. Infect Immun. 1997 Dec; 65(12):5301-8. PMID: 9393830; PMCID: PMC175763.
    64. Kang PJ, Hauser AR, Apodaca G, Fleiszig SM, Wiener-Kronish J, Mostov K, Engel JN. Identification of Pseudomonas aeruginosa genes required for epithelial cell injury. Mol Microbiol. 1997 Jun; 24(6):1249-62. PMID: 9218773.
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    65. van Ooij C, Apodaca G, Engel J. Characterization of the Chlamydia trachomatis vacuole and its interaction with the host endocytic pathway in HeLa cells. Infect Immun. 1997 Feb; 65(2):758-66. PMID: 9009339; PMCID: PMC176122.
    66. Tan M, Wong B, Engel JN. Transcriptional organization and regulation of the dnaK and groE operons of Chlamydia trachomatis. J Bacteriol. 1996 Dec; 178(23):6983-90. PMID: 8955323; PMCID: PMC178602.
    67. Tan M, Engel JN. Identification of sequences necessary for transcription in vitro from the Chlamydia trachomatis rRNA P1 promoter. J Bacteriol. 1996 Dec; 178(23):6975-82. PMID: 8955322; PMCID: PMC178601.
    68. Apodaca G, Bomsel M, Lindstedt R, Engel J, Frank D, Mostov KE, Wiener-Kronish J. Characterization of Pseudomonas aeruginosa-induced MDCK cell injury: glycosylation-defective host cells are resistant to bacterial killing. Infect Immun. 1995 Apr; 63(4):1541-51. PMID: 7890421; PMCID: PMC173187.
    69. Dell KR, Engel JN. Stage-specific regulation of protein phosphorylation in Leishmania major. Mol Biochem Parasitol. 1994 Apr; 64(2):283-92. PMID: 7935606.
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    70. Tan M, Klein R, Grant R, Ganem D, Engel J. Cloning and characterization of the RNA polymerase alpha-subunit operon of Chlamydia trachomatis. J Bacteriol. 1993 Nov; 175(22):7150-9. PMID: 8226662; PMCID: PMC206856.
    71. Engel JN. Azithromycin-induced block of elementary body formation in Chlamydia trachomatis. Antimicrob Agents Chemother. 1992 Oct; 36(10):2304-9. PMID: 1280057; PMCID: PMC245493.
    72. Perara E, Ganem D, Engel JN. A developmentally regulated chlamydial gene with apparent homology to eukaryotic histone H1. Proc Natl Acad Sci U S A. 1992 Mar 15; 89(6):2125-9. PMID: 1549572; PMCID: PMC48609.
    73. Engel JN, Pollack J, Perara E, Ganem D. Heat shock response of murine Chlamydia trachomatis. J Bacteriol. 1990 Dec; 172(12):6959-72. PMID: 2254267; PMCID: PMC210816.
    74. Engel JN, Pollack J, Malik F, Ganem D. Cloning and characterization of RNA polymerase core subunits of Chlamydia trachomatis by using the polymerase chain reaction. J Bacteriol. 1990 Oct; 172(10):5732-41. PMID: 2211507; PMCID: PMC526889.
    75. Engel JN, Ganem D. A polymerase chain reaction-based approach to cloning sigma factors from eubacteria and its application to the isolation of a sigma-70 homolog from Chlamydia trachomatis. J Bacteriol. 1990 May; 172(5):2447-55. PMID: 2110143; PMCID: PMC208882.
    76. Sardinia LM, Engel JN, Ganem D. Chlamydial gene encoding a 70-kilodalton antigen in Escherichia coli: analysis of expression signals and identification of the gene product. J Bacteriol. 1989 Jan; 171(1):335-41. PMID: 2644193; PMCID: PMC209592.
    77. Engel JN, Ganem D. Chlamydial rRNA operons: gene organization and identification of putative tandem promoters. J Bacteriol. 1987 Dec; 169(12):5678-85. PMID: 2445732; PMCID: PMC214038.
    78. Engel JN, Mellul VG, Goodman DB. Phenytoin hypersensitivity: a case of severe acute rhabdomyolysis. Am J Med. 1986 Nov; 81(5):928-30. PMID: 3776999.
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    79. Engel, JN, Mellul, VG, Goodman, DBP.Phenytoin hypersensitivity: a case of severe acute rhabdomyolysis. American Journal of Medicine. 1986; 81:928-930.
    80. Ponte, P, Ng, SY, Engel, JN, Kedes, LH.Evolutionary conservation in the untranslated regions of actin mRNA's. Nucleic Acids Research. 1984; 12:1687-1696.
    81. Kedes, LH, Blau, H, Gunning, P, Ponte, P, Chiu, C-P, Bain, W, Engel, JN, Guttman, S.Molecular genetics of human myogenesis. Experimental Biology and Medicine. 1983; 9:202-212.
    82. Gunning, P, Ponte, P, Okayama, H, Engel, JN, Kedes, L.Isolation and characterization of full-length cDNA clones for human a-, b-, and c- actin mRNA's: skeletal but not cytoplasmic actins have an amino terminal cysteine that is subsequently removed. Molecular and Cellular Biology. 1983; 3:787-795.
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