The L-arabinose operon, also called the ara or araBAD operon, is an operon required for the breakdown of the five-carbon sugar L-arabinose in Escherichia coli. [1]

2010年9月1日 · This review covers the physiological aspects of regulation of the arabinose operon in Escherichia coli and the physical and regulatory properties of the operon's controlling gene, araC. It also describes the light switch mechanism as an explanation for many of the protein's properties.

2000年12月1日 · Over forty years of research on the l -arabinose operon of Escherichia coli have provided insights into the mechanism of positive regulation of gene activity. This research also discovered DNA looping and the mechanism by which the regulatory protein changes its DNA-binding properties in response to the presence of arabinose.

This review covers the physiological aspects of regulation of the arabinose operon in Escherichia coli and the physical and regulatory properties of the operon's controlling gene, araC. It also describes the light switch mechanism as an explanation for many of the protein's properties.

In arabinose operon, the inducer molecule is the arabinose that binds with the repressor protein to induce the transcription of the gene into mRNA. The arabinose operon works positively in the presence of inducer and works negatively in the absence of inducer.

2024年5月31日 · What is Arabinose Operon? The L-arabinose operon, also known as the ara or araBAD operon, is essential for the degradation of the five-carbon sugar L-arabinose in Escherichia coli.

The L-arabinose operon, also called ara operon, is a gene sequence encoding enzymes needed for the catabolism of arabinose to xylulose 5-phosphate, an intermediate of the pentose phosphate pathway. It has both positive and negative regulation.

Englesberg deletions, D719 and D766, enter the arabinose operon, along with a table indicating the levels of transcription of the araBAD genes in the absence of AraC protein provided in trans from an episome introduced into the cells, in the presence of AraC, and in the presence of AraC and arabinose. L-ArabinoseOperon

L-arabinose operon of Escherichia coli. The araCBAD gene cluster is at 1.45 min on the genetic map, araE is at 64.2 min, and araFGH is at 42.7 min. Also shown is the metabolic pathway for conversion of L-arabinose to D-xylulose 5-phosphate.

The locations of DNA binding by the proteins involved with positive and negative regulation of transcription initiation of the L-arabinose operon in Escherichia coli have been determined by the DNase I protection method.