Comparative proteomic analysis reveals the regulatory network of the veA gene during asexual and sexual spore development of Aspergillus cristatus

• Published in: Bioscience reports 2018-08, Vol.38 (4)
• Main Authors: Liu, Hui, Sang, Shilei, Wang, Hui, Ren, Xiyi, Tan, Yumei, Chen, Wei, Liu, Zuoyi, Liu, Yongxiang
• Format: Article
• Language: English
• Subjects: Aspergillus - genetics; Aspergillus - growth & development; Fungal Proteins - genetics; Gene Expression Regulation, Fungal; Gene Regulatory Networks; Proteomics; Reproduction, Asexual; Spores, Fungal - genetics; Spores, Fungal - growth & development
• ISSN: 0144-8463; 1573-4935
• DOI: 10.1042/BSR20180067

is the predominant fungal population during fermentation of Chinese Fuzhuan brick tea, and belongs to the homothallic fungal group that undergoes a sexual stage without asexual conidiation under hypotonic conditions, while hypertonic medium induces initiation of the asexual stage and completely blocks sexual development. However, the deletion mutant only produces conidia in hypotonic medium after a 24-h culture, but both asexual and sexual spores are observed after 72 h. The gene is one of the key genes that positively regulates sexual and negatively regulates asexual development in To elucidate the molecular mechanism of how VeA regulates asexual and sexual spore development in , 2D electrophoresis (2-DE) combined with MALDI-tandem ToF MS analysis were applied to identify 173 differentially expressed proteins (DEPs) by comparing the agamotype (24 h) and teleomorph (72 h) with wild-type (WT) strains. Further analysis revealed that the changed expression pattern of Pmk1-MAPK and Ser/Thr phosphatase signaling, heat shock protein (Hsp) 90 (HSP90), protein degradation associated, sulphur-containing amino acid biosynthesis associated, valine, leucine, isoleucine, and arginine biosynthesis involved, CYP450 and cytoskeletal formation associated proteins were involved in the production of conidia in agamotype of Furthermore, the deletion of in resulted in disturbed process of transcription, translation, protein folding, amino acid metabolism, and secondary metabolism. The carbohydrate and energy metabolism were also greatly changed, which lied in the suppression of anabolism through pentose phosphate pathway (PPP) but promotion of catabolism through glycolysis and tricarboxylic acid (TCA) cycle. The energy compounds produced in the agamotype were mainly ATP and NADH, whereas they were NADPH and FAD in the teleomorph. These results will contribute to the existing knowledge on the complex role of VeA in the regulation of spore development in and provide a framework for functional investigations on the identified proteins.