SMG1 and neoplasm: Next, for the purpose of searching for the probable effector protein that in circVMA21/miR‐9‐3p axis in HK‐2 cells, we conducted the TargetScan analysis (TargetScan Release 7.1) and revealed that the 3′‐UTR of SMG1, a potential tumour suppressor in several different cancers, contained a miR‐9‐3p binding site.22