Component of the 40S small ribosomal subunit. Monoubiquitinated by ZNF598 when a ribosome has stalled during translation of poly(A) sequences, leading to preclude synthesis of a long poly-lysine tail and initiate the ribosome quality control (RQC) pathway to degrade the potentially detrimental aberrant nascent polypeptide. Ufmylated by UFL1. Belongs to the universal ribosomal protein uS10 family.