The Arabidopsis HOS1 gene negatively regulates cold signal transduction and encodes a RING finger protein that displays cold-regulated nucleo-cytoplasmic partitioning

Article Abstract:

The Arabidopsis thaliana HOS1 gene has been found to negatively regulate cold signal transduction. It also encodes a RING finger protein that displays cold-regulated nucleo-cytoplasmic partitioning. Low temperature is a very important environmental stimulus in controlling gene transcription programs and development in plants. Map-based cloning and molecular analysis of HOS1, the first genetic locus involved in cold-regulated plant development and signaling to be characterized at the molecular level, has been undertaken to find the molecular nature of the key regulatory genes involved.

Environmental aspects, Genetic aspects, Plants, Plants (Organisms), Cellular signal transduction, Plant ecophysiology, Plant physiological ecology

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BIG: a calossin-like protein required for polar auxin transport in Arabidopsis

Article Abstract:

Research has shown that doc1 mutants are allelic to tir3 mutants and that they define BIG, a calossin-like protein necessary for Arabidopsis polar auxin transport. The BIG gene, which is very large, giving a reason for the name, likely encodes an enormous protein with significant identity to the Drosophila protein Calossin/Pushover.

Physiological aspects, Carrier proteins, Transport proteins, Auxin, Auxins

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