arrs

ARRs is an acronym that can refer to more than one concept depending on the field. In biology it denotes a family of genes known as Arabidopsis Response Regulators, and in business it denotes Annual Recurring Revenue, a metric used by subscription-based companies.

In plant biology, Arabidopsis Response Regulators are components of the cytokinin signaling pathway. They comprise two main classes: Type-A regulators, which largely act as negative feedback regulators, and Type-B regulators, which function as transcription factors that activate cytokinin-responsive genes. The ARRs are activated through a phosphorelay initiated by cytokinin receptors and histidine phosphotransfer proteins. They influence diverse developmental processes, including shoot and root architecture, shoot apical meristem activity, leaf senescence, and stress responses. In Arabidopsis thaliana, numerous ARR genes have been described, with well-studied members such as ARR1, ARR2, ARR10, and ARR12. The activity of ARRs is often modulated by cross-talk with other hormones, notably auxin, as well as environmental signals.

In business, Annual Recurring Revenue is a metric that measures the predictable revenue from subscriptions over a one-year period. It is typically calculated by annualizing the recurring value of active subscriptions, then adjusting for expansions, contractions, and churn. One-time fees and professional services are usually excluded. ARR is used to gauge growth, forecast revenue, and compare performance across products and time periods in SaaS and other subscription-based businesses. Limitations include sensitivity to pricing changes, contract terms, and customer mix; ARR should be interpreted alongside other metrics such as MRR (monthly recurring revenue) and gross versus net revenue.