Alan M. Jones

Alan M. Jones (born 13 May 1957) is an American cell biologist. He is Kenan Distinguished Professor of Biology [1] at the University of North Carolina at Chapel Hill and has a joint appointment with the Department of Pharmacology in the UNC School of Medicine. He is the President of the American Society of Plant Biologists (ASPB).[2] He is a Fellow of The American Association for the Advancement of Science, Fellow of American Society of Plant Biologists, and an Alexander von Humboldt Fellow.

Education

Jones received his B.S magna cum laude in Botany from the University of Florida in 1978 and his PhD in Plant Biology from the University of Illinois at Urbana-Champaign in 1983. He was first under the mentorship of Larry N. Vanderhoef and finished his training with Tuan-hua David Ho. In the middle of his PhD program, Jones spent 2 years at the Friedrich Miescher Institute in Basal Switzerland under the mentorship of Fred Meins. His postdoctoral training was at the University of Wisconsin- Madison under the mentorship of Peter Quail. Jones joined the faculty at the University of North Carolina at Chapel Hill in 1986.

Research

Phytochrome

During his postdoctoral training, Jones established that the plant photoreceptor, phytochrome A, is dimeric and he showed a minimal structural unit for photoperception. This worked continued into his early years at the University of North Carolina and directed subsequent structure analyses of phytochrome by other labs.

Plant Hormone Receptors

During the 1970s, in collaboration with the organic chemist Nelson Leonard, Jones invented a photoaffinity labeling technique [3] to identify auxin receptors in plant extracts. He provided the first data proving that Auxin-binding Protein 1 (ABP1) binds auxin [4] and, in collaboration with Michael Sussman, proved that this receptor is essential for normal auxin-mediated growth[5][6] The later discovery was only the second report of a gene knockout mutant in the genetic model, Arabidopsis thaliana.[7] Despite his proof that auxin binding to ABP1 is the rate-limiting step for auxin signal transduction, the classification of ABP1 as a hormone receptor remains controversial among plant cell biologists because the structure and properties of ABP1 do not fit any animal hormone receptor paradigm.

Programmed Cell Death

In the 1990s, Jones studied programmed cell death associated with plant cell differentiation. He elucidated the role of the vacuole in hydrolytic-based plant cell death.[8]

G Protein-coupled Signaling

In 2000, Jones switched his research effort to the study of the heterotrimeric G protein signaling pathway in Arabidopsis. His rationalization was that Arabidopsis, having a simpler repertoire of G signaling elements than mouse and much easier to genetically engineer, would serve as a good multicellular model for G signaling research. Jones showed that G protein signaling in plants and many other taxa on the tree of life differed from the well-established animal paradigm.[9]

References

  1. ↑ "New Distinguished professors honored at fall reception, 2013" https://college.unc.edu/2013/11/22/profs2013/
  2. ↑ "Alan Jones elected president of the American Society of Plant Biologists" http://bio.unc.edu/news/alan-jones-elected-president-of-the-american-society-of-plant-biologists/
  3. ↑ Jones, A.M., L.L. Melhado, T.-H.D. Ho, C.J. Pearce, and N.J. Leonard (1984) Azido Auxins: Photoaffinity labeling of auxin-binding proteins in maize coleoptile with tritiated 5-azidoindole-3- acetic acid. Plant Physiol 75:1111-1116
  4. ↑ Jones, A.M., M.A. Venis (1989) Photoaffinity labeling of auxin-binding proteins in maize. Proc. Natl. Acad. Sci. USA 86:6153-6156
  5. ↑ Ullah, H. Chen, J. G., Young, J., Im, K-H., Sussman, MR., Jones, AM (2001) Modulation of cell proliferation by heterotrimeric G-protein in Arabidopsis. Science 292: 2066-2069
  6. ↑ Jones, A. M. , Im, K-H., Savka, M., Wu, M-J., DeWitt, N.G., Shillito, R. Binns, A. (1998) Auxin-dependent cell expansion mediated by overexpressed auxin-binding protein 1. Science 282: 1114-1117.
  7. ↑ Chen, J, Ullah, H., Young, J.C., Sussman, M.R., Jones, A.M (2001) ABP1 is required for organized cell elongation and division in Arabidopsis embryogenesis. Genes and Development 15:902-911.
  8. ↑ Jones, A M (2001) Programmed cell death in development and defense. Plant Physiol. 125: 94-97
  9. ↑ Urano, D Chen, J-G Botella, JR and Jones AM (2013) Heterotrimeric G protein signaling in the plant kingdom. Open Biology Mar 27;3(3):120186. doi: 10.1098/rsob.120186
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