Whole track RNAseq of the deletion mutant ?cgt in Actinoplanes sp. SE50/110 during growth phase and during transition into stationary phase

Actinoplanes sp. SE50/110 (ATCC 31044) is the wild type of industrial producer strains of acarbose. Acarbose is used since the early 1990s as an inhibitor of intestinal human alpha-glucosidases in the medical treatment of type II diabetes mellitus. The small secreted protein Cgt, which consists of a single carbohydrate-binding module (CBM) 20-domain, was found to be highly expressed in Actinoplanes sp. SE50/110 in previous studies, but neither its function nor a possible role in acarbose formation was explored, yet. Due to this and its high abundance in the extracellular proteome of Actinoplanes, a functional role within the sugar metabolism or in the environmental stress protection was assumed. However, the gene deletion mutant ?cgt, constructed by CRISPR/Cas9 technology, displayed no apparent phenotype in screening experiments testing for pH and osmolarity stress, limited carbon source starch as well as excess of seven different sugars in liquid culture and further 97 carbon sources in the Omnilog Phenotypic Microarray system of Biolog. Therefore, a protective function as a surface protein or a function within the retainment and the utilization of carbon sources could not be experimentally validated. Remarkably, enhanced production of acarbose was determined yielding into 8-16 % higher product titers when grown in maltose-containing medium. Here the whole track RNAseq data of ?cgt and the wild type of Actinoplanes sp. SE50/110 during growth phase and during transition into stationary phase are provided, when grown in maltose minimal medium.