Molecular modeling of auxin transport inhibitors

Conference · Tue May 01 00:00:00 EDT 1990 · Plant Physiology, Supplement; (USA)

OSTI ID:5841576

Gardner, G; Black-Schaefer, C; Bures, M G ^[1]

---

1. Abbott Labs, North Chicago, IL (USA)

Molecular modeling techniques have been used to study the chemical and steric properties of auxin transport inhibitors. These bind to a specific site on the plant plasma membrane characterized by its affinity for N-1-naphthylphthalamic acid (NPA). A three-dimensional model was derived from critical features of ligands for the NPA receptor, and a suggested binding conformation is proposed. This model, along with three-dimensional structural searching techniques, was then used to search the Abbott corporate database of chemical structures. Of the 467 compounds that satisfied the search criteria, 77 representative molecules were evaluated for their ability to compete for ({sup 3}H)NPA binding to corn microsomal membranes. Nineteen showed activity that ranged from 16 to 85% of the maximum NPA binding. Four of the most active of these, from chemical classes not included in the original compound set, also inhibited polar auxin transport through corn coleoptile sections.

• OSTI ID: 5841576
• Report Number(s): CONF-9007196-; CODEN: PPYSA
• Journal Information: Plant Physiology, Supplement; (USA), Vol. 93:1; Conference: Annual meeting of the American Society of Plant Physiologists, Indianapolis, IN (USA), 29 Jul - 2 Aug 1990; ISSN 0079-2241
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
AUXINS
INHIBITION
PLANT GROWTH REGULATORS
MOLECULAR MODELS
CELL MEMBRANES
MAIZE
MICROSOMES
ORGANIC ACIDS
TRACER TECHNIQUES
TRITIUM COMPOUNDS
CELL CONSTITUENTS
CEREALS
GRAMINEAE
HYDROGEN COMPOUNDS
ISOTOPE APPLICATIONS
LILIOPSIDA
MAGNOLIOPHYTA
MATHEMATICAL MODELS
MEMBRANES
ORGANIC COMPOUNDS
ORGANOIDS
PLANTS
RIBOSOMES
550201* - Biochemistry- Tracer Techniques