Katie Greenham

University of California, San Diego
Biological Sciences
Muir Biology Building, 4115
La Jolla, CA 92093-0116
Lab: 858-246-0454


I am a graduate student in Mark Estelle’s lab at UCSD ( and my co-advisor is Elizabeth Komives in the Department of Chemistry and Biochemistry (

My current research is focused on characterizing two members of the auxin receptor family. The phytohormone auxin is an essential component to plant growth and development, playing a role from the early stages of embryogenesis to the senescent plant. The auxin receptor family is comprised of six members; TIR1 and AFB1-5. Phylogenetic analysis reveals that the AFB4/5 clade diverged from the other members before seed plant radiation. The conservation of these receptors across seed plants suggests that they maintain distinct functions. Picloram, a synthetic auxin, works specifically through AFB4/5, thus revealing structural differences of these receptors. A biochemical and genetic analysis of these receptors may reveal distinct roles or substrates important for the auxin response.


Gennidakis S., Rao S., Greenham K., Uhrig RG., O’Leary B., Snedden WA., Lu C., Plaxton WC. (2007). Bacterial- and plant-type phosphoenolpyruvate carboxylase polypeptides interact in the hetero-oligomeric Class-2 PEPC complex of developing castor oil seeds. Plant J. 52(5): 839-49.

Surzycki, R., Greenham, K., Wagner, R.E. and Surzycki, S. (2009). Factors effecting expression of vaccines in microalgae. Biologicals 37:133-138.