• Ph.D., University of Texas Health Science Center at San Antonio (UTHSCSA), 2009
  • M.S., Texas A&M University-Kingsville (TAMUK), 2001
  • B.S., University of Alexandria-Egypt, 1992


  • General Biology for Majors I and II
  • Cell Biology
  • Biochemistry I and II
  • Cell and Molecular Methods


Ahmad Galaleldeen, Ph.D., earned his bachelor’s, master’s and Ph.D. in Biochemistry. During his Ph.D. and postdoctoral tenure at UTHSCSA, he was trained as a biochemist and a structural biologist. Following his bachelor’s, he held a chemistry and biology teaching position in Egypt for six years before moving to the US. While pursuing his master’s, he also held an algebra and chemistry teaching position at the Presbyterian Pan American School in Kingsville.

Galaleldeen joined the laboratory of Dr. John Hart at UTHSCSA in 2003 and focused his research on the familial form of amyotrophic lateral sclerosis (ALS) also known as Lou Gehrig’s disease. ALS is the most common adult motor neuron disease, characterized by the progressive destruction of both upper and lower motor neurons. The disorder typically manifests as muscle weakness in the extremities that progresses throughout the body, resulting in paralysis and death generally within five years post-diagnosis. Approximately 20 percent of the familial cases are linked to mutations in the copper-zinc superoxide dismutase (SOD1) gene. Galaleldeen determined the crystal structure of several pathogenic SOD1 mutants including A4V, the most common ALS mutation in North America, in its metal free form.

During his postdoctoral training in the Hart lab, Galaleldeen collaborated with Dr. Guangming Zhong on a project to understand Chlamydial pathogenesis. Chlamydia trachomatis is an intracellular gram negative bacterial pathogen with many different strains that infect and cause disease in humans and animals. C. trachomatis infection of the urinogenital tract is the most common sexually transmitted disease in the world. C. trachomatis can also infect the eye, causing trachoma that can lead to blindness. Galaleldeen characterized and determined the structure of pgp3, an immunodominant antigen that is heavily secreted by C. trachomatis into the cytoplasm of the host cells in the first 24 hours post-infection.


Sea K. W., Taylor A. B., Thomas T. T., Liba A., Bergman I. B., Holloway S. P., Cao X., Gralla E., Valentine J. S., Hart P. J., and Galaleldeen A. (2021) pH switch controls zinc binding in tomato copper-zinc superoxide dismutase. Biochemistry. (in press) PMID: 33961402   DOI: 10.1021/acs.biochem.1c00133

Ayers J. I., Xu G., Dillon K., Lu Q., Chen Z., Beckman J., Moreno-Romero A. K., Zamora D. L., Galaleldeen A. and Borchelt D. R. (2021) Variation in the vulnerability of mice expressing human superoxide dismutase 1 to prion-like seeding; a study of the influence of primary amino acid sequence. Acta Neuropathologica Comms. (in press)  PMID: 34016165 DOI: 10.1186/s40478-021-01191-w

Crown A., McAlary L., Fagerli E., Brown H., Yerbury J. J., Galaleldeen A., Cashman N. R., Borchelt D. R., Ayers J. I. (2020) Tryptophan residue 32 in human Cu-Zn superoxide dismutase modulates prion-like propagation and strain selection, PLoS One 30;15(1)

Kim K., Subrhamunium, S., Galaleldeen, A., Nakazawa, A., Umetsu, M., Teizer, W. and Bhattacharyya S. (2019) Nanoparticle Assisted Remodeling of Proteotoxic SOD1 Mutants Alters the Biointerface of the Functional Interaction of Microtubules and Kinesin Motors, ACS Appl. Bio Mater. 10;4121-4128

Ayers, J. I., Riffe, C. J.,  Sorrentino, Z. A., Diamond, J., Fagerli, E., Brooks, M., Galaleldeen, A., Hart, P. J., and Giasson B. I. (2018) Localized induction of wild-type and mutant alpha-synuclein aggregation reveals propagation along neuroanatomical tracts, Journal of Virology (18): e00586-18

Ayers, J. I., Diamond, J., Sari, A., Fromholt, S., Galaleldeen, A., Ostrow, L. W., Glass, J. D., Hart, P. J., and Borchelt, D. R. (2016) Distinct conformers of transmissible misfolded SOD1 distinguish human SOD1-FALS from other forms of familial and sporadic ALS, Acta Neuropathologica, 1-14.

Peterson, R. L., Galaleldeen, A., Villarreal, J., Taylor, A. B., Cabelli, D. E., Hart, P. J., and Culotta, V. C. (2016) The Phylogeny and Active Site Design of Eukaryotic Copper-only Superoxide Dismutases, Journal of Biological Chemistry 291, 20911-20923.

Becker, A., Kannan, T. R., Taylor, A. B., Pakhomova, O. N., Zhang, Y., Somarajan, S. R., Galaleldeen, A., Holloway, S. P., Baseman, J. B., and Hart, P. J. (2015) Proc Natl Acad Sci USA 112, 5165-5170. Structure of CARDS toxin, a unique ADP-ribosylating and vacuolating cytotoxin from Mycoplasma pneumoniae

Gleason*, J. E., Galaleldeen*, A., Peterson, R. L., Taylor, A. B., Holloway, S. P., Waninger-Saroni, J., Cormack, B. P., Cabelli, D. E., Hart, P. J., and Culotta, V. C. (2014) Proc Natl Acad Sci USA. “Candida albicans SOD5 represents the prototype of an unprecedented class of Cu-only superoxide dismutases required for pathogen defense”. 
*contributed equally

Ivanova, M. I., Sievers, S. A., Guenther, E. L., Johnson, L. M., Winkler, D. D., Galaleldeen, A. Sawaya, M. R. Hart, P. J., and Eisenberg, D. (2014) Proc Natl Acad Sci USA. 111(1):197-201  “Aggregation-triggering segments of SOD1 fibrillation support a common pathway for familial and sporadic ALS”

Galaleldeen, A., Taylor, A. B., Chen, D., Schuermann, J. P., Holloway, S. P., Hou, S., Gong, S., Zhong, G. and Hart, P. J. (2013) J. Biol. Chem.288(30):22068-79 “Structure of the Chlamydia trachomatis Antigen Pgp3”.

Lin, A. P., Demeler, B., Minard, K. I., Anderson S. L., Schirf, V., Galaleldeen, A., and McAlister-Henn, L. (2011) Biochemistry. 50(2), 230-239. “Construction and Analyses of Tetrameric Forms of Yeast NAD(+) Specific Isocitrate Dehydrogenase”.

Chen, D., Lei, L., Lu, C., Galaleldeen, A., Hart, P. J., and Zhong, G. (2010) J. Bacteriol. 192(22), 6017-24. Characterization of Pgp3, a Chlamydia trachomatis Plasmid-encoded Immunodominant Antigen”.

Galaleldeen, A., Strange, R., Whitson, L. J., Antonyuk, S., Taylor, A. B., Hasnain, S. S., and Hart, P. J. (2009) Arch. Biochem. Biophys. 492(1-2), 40-47. “Structural and Biophysical Properties of Metal-Free Pathogenic SOD1 Mutants A4V and G93A”.

Galaleldeen, A., and Hart, P. J. “Human Copper-Zinc Superoxide Dismutase and Familial Amyotrophic Lateral Sclerosis” in: Protein Reviews, Protein Misfolding, Aggregation and Conformational Diseases. (Zouhair Atassi Ed.) (2007) pp. 327-344, Springer, New York.

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