Part of the gene cluster that mediates the biosynthesis of chaetoglobosin A which has a unique inhibitory activity against actin polymerization in mammalian cells (PubMed:23611317, PubMed:33622536). Chaetoglobosin A and its intermediates are involved in the morphological differentiation of C.globosum (PubMed:33622536). The first step of the pathway is the synthesis of prochaetoglobosin I via condensation of one acetyl-CoA, 8 malonyl-CoA, and a L-tryptophan molecule by the PKS-NRPS hybrid synthetase cheA, followed by reduction of backbone double bond to install desired geometry by the enoyl reductase cheB (PubMed:23611317). Further multiple oxidation steps performed by the cytochrome P450 monooxygenases cheE and cheG, as well as by the FAD-linked oxidoreductase cheF, lead to the formation of chaetoglobosin A (PubMed:23611317). Depending on the order of action of these reductases, distinct intermediates can be identified (PubMed:23611317). Within the pathway, the cytochrome P450 monooxygenase cheE catalyzes a stereospecific epoxidation on prochaetoglobosin I, cytoglobosin D, and chaetoglobosin J intermediates (PubMed:23611317). The FAD-linked oxidoreductase cheF performs dehydrogenation of the C-20 hydroxyl groups in the 20-dihyrochaetoglobosin A and cytoglobosin D intermediates (PubMed:23611317). Finally, the cytochrome P450 monooxygenase cheG can catalyze the stereospecific dihydroxylation of prochaetoglobosin I and prochaetoglobosin IV at C-19 and C-20, respectively (PubMed:23611317). The Diels-Alderase cheD may play a role in the post-PKS-NRPS biosynthetic steps catalyzing Diels-Alder cyclization (Probable). Expression is positively regulated by the cluster-specific transcription factor cheR that binds directly to an asymmetric direct repeat present in the promoter.