Protein-L-isoaspartyl O-methyltransferase (PIMT) from Thermotoga maritima is a conserved and nearly ubiquitous enzyme involved in the repair of proteins damaged by age-related isoaspartyl formation. PIMT consists of three domains. This entry represents its C-terminal domain, which shows a five-stranded beta meander flanked on both sides by alpha helices. Its function is unknown [1].

1: Crystal structure of protein isoaspartyl methyltransferase: a catalyst for protein repair. Skinner MM, Puvathingal JM, Walter RL, Friedman AM; Structure. 2000;8:1189-1201. PMID:11080641