Members of the Small Auxin-Up RNA (SAUR)family are specifically induced within minutes of auxin application. Additionally SAURs can be upregulated upon the application of the translational inhibitor cycloheximide; this suggests that the transcription of SAURs is regulated by short lived repressors. SAUR genes were initially identified in Soybean, and since then have been identified in Arabidopsis (over 70 members), Mung bean, Pea, Tobacco and maize. SAUR proteins are able to bind to calmodulin in vitro, suggesting that they may act as a link between Calcium/Calmodulin second messengers and auxin signalling.
Curator Comment
Nearest marker: C52865S. Contains a predicted Nuclear Localisation Signal.