Postdoctoral Research Associate - Biochemistry

Position Summary Location: ST. LOUIS, MO 63110 The Ghanbarpour Laboratory in the Department of Biochemistry and Molecular Biophysics at WashU Medicine is seeking a highly motivated Postdoctoral Researcher to join our interdisciplinary research program. Our lab investigates how bacteria and human mitochondria maintain homeostasis and respond to stress and environmental challenges. A central focus of our research is uncovering the molecular mechanisms of ATP-dependent AAA proteolytic machines, both soluble and membrane-spanning, and their accessory factors in bacterial and mitochondrial systems. We study how these complexes assemble, achieve substrate specificity, and promote bacterial recovery from antibiotic stress, environmental changes, and pathogen attack. These efforts combine cryo-EM and cryo-ET structural biology, biochemical and cellular assays, and mass spectrometry. The lab also explores bacterial defense mechanisms against bacteriophage infection, including rewiring of proteolytic systems and the deployment of innate immune strategies that enable survival during phage attack. In addition, another major focus of our research is protein engineering and the development of new molecular tools based on these proteolytic systems. Experience in cryo-EM/cryo-ET is highly desirable; additional expertise in biochemistry, genetic microbiology, or protein engineering is a plus. As a Postdoctoral Researcher, you will gain extensive hands‑on training in cryo‑EM sample preparation and data analysis, heterogeneity analysis tools, mass spectrometry, membrane biology, biochemistry, and cellular assays. The Ghanbarpour Laboratory and WashU Medicine provide state‑of‑the‑art infrastructure for structural biology, biochemistry, and mass spectrometry, along with a highly collaborative research environment. Importantly, postdoctoral researchers are encouraged to dedicate up to 20% of their time to an independent research project, with the opportunity to develop a faculty‑level research proposal. This position is well suited for individuals pursuing careers in academia and supported by NIH grant R35GM160328, the Longer Life Foundation, and WashU startup funds. Related Papers Zhang T.; Barbosa R.; Ghanbarpour, A.; Laub, T. M.; Activation of a bacterial immunity protein via supramolecular assembly with multiple phage triggers, Nature (2026). Iqbal, N.; Keller, S.; Ghanbarpour, A. Structural plasticity of the membrane‑bound protein degradation assembly supports bacterial adaptation to stress. Biorxiv, 2025. Ghanbarpour, A.; Telusma, B.; Powell, B.; Zhang, J. J.; Bolstad, I.; Vargas, C.; Keller, S.; Baker, T. A; Sauer, R. T; Davis, J. H.; An asymmetric nautilus‑like HflK/C assembly controls FtsH proteolysis of membrane proteins, The EMBO Journal, 44, 2501 (2025). Ghanbarpour, A.; Sauer, R. T; Davis, J. H.; A proteolytic AAA+ machine poised to unfold a protein substrate, Nature Communications, 15, 9681 (2024). Job Description Information on being a postdoc at WashU in St. Louis can be found at Primary Duties & Responsibilities Assists with grant preparation and reporting. Prepares and submits papers on research. Assists in the design of research experiments. Evaluates research findings and assists in the reporting of the results. Conscientious discharge of their research responsibilities. Maintains conformity with ethical standards in research. Maintains compliance with good laboratory practice including the maintenance of adequate research records. Engages in open and timely discussion with their mentor regarding possession or distribution of material, reagents, or records belonging to their laboratory and any proposed disclosure of findings or techniques privately or in publications. Collegial conduct towards co‑trainees, staff members and members of the research group. Adherence to all applicable University policies, procedures and regulations. All data, research records and materials and other intellectual property generated in University laboratories remain the property of the University. Working Conditions This position works in a laboratory environment with potential exposure to biological and chemical hazards. The individual must be physically able to wear protective equipment and to provide standard care to research animals. Salary Range Base pay is commensurate with experience. The above statements are intended to describe the general nature and level of work performed by people assigned to this classification. They are not intended to be construed as an exhaustive list of all job duties performed by the personnel so classified. Management reserves the right to revise or amend duties at any time. Education Required Qualifications Ph.D., M.D. Or Equivalent Terminal Or Doctoral Degree. Certifications/Professional Licenses No specific certification/professional license is required for this position. Work Experience No specific work experience is required for this position. Skills Not Applicable Driver's License A driver's license is not required for this position. More About This Job Have a 5-year term limit that includes previous experience. Preferred Qualifications No additional education unless stated elsewhere in the job posting. No additional certification/professional licenses unless stated elsewhere in the job posting. No additional work experience unless stated elsewhere in the job posting. Skills Collaboration, Data Analysis, Data Interpretations, Experimentation, Laboratory Operations, Laboratory Techniques, Researching, Results Reporting, Scientific Writing Questions For frequently asked questions about the application process, please refer to our External Applicant FAQ. Accommodation If you are unable to use our online application system and would like an accommodation, please email View email address on click.appcast.io or call the dedicated accommodation inquiry number at View phone number on click.appcast.io and leave a voicemail with the nature of your request. All qualified individuals must be able to perform the essential functions of the position satisfactorily and, if requested, reasonable accommodations will be made to enable employees with disabilities to perform the essential functions of their job, absent undue hardship. Pre-Employment Screening All external candidates receiving an offer for employment will be required to submit to pre‑employment screening for this position. The screenings will include criminal background check and, as applicable for the position, other background checks, drug screen, an employment and education or licensure/certification verification, physical examination, certain vaccinations and/or governmental registry checks. All offers are contingent upon successful completion of required screening. Benefits Statement Washington University in St. Louis is committed to providing a comprehensive and competitive benefits package to our employees. Benefits eligibility is subject to employment status, full‑time equivalent (FTE) workload, and weekly standard hours. Please visit our website at to view a summary of benefits. EEO Statement Washington University in St. Louis is committed to the principles and practices of equal employment opportunity. It is the University’s policy to provide equal opportunity and access to persons in all job titles without regard to race, ethnicity, color, national origin, citizenship (where prohibited by federal law), age, religion, sex, sexual orientation, gender identity or expression, disability, protected veteran status, or genetic information. #J-18808-Ljbffr Washington University in St. Louis