Protein N-lysine methyltransferase METTL21A (Mettl21A)

Protein-lysine methyltransferase that trimethylates residues in heat shock protein 70 (HSP70) family members. Contributes to the in vivo trimethylation of Lys residues in HSPA1 and HSPA8.

In vitro methylates 'Lys-561' in HSPA1, 'Lys- 564' in HSPA2, 'Lys-585' in HSPA5, 'Lys-563' in HSPA6 and 'Lys- 561' in HSPA8 (By similarity). .