Chromosome 11q23 translocations targeting mixed-lineage leukemia 1 (MLL) gene have been correlated with human acute leukemias, including lymphoid, myeloid, monoblastic and myelomonocytic varieties. More than 3 dozen genes that fuse to with MLL have been identified in various types of malignancies, including AF4, AF9, ENL, CBL, LARG, LPP, GMPS, and FBP17. The 431 kDa MLL protein exhibits greatest abundancy in cerebral cortex, kidney, thyroid, and lymphoid tissues. Inside the cell, MLL is part of a stable multiprotein supercomplex, the majority of which are components of transcription complexes, including TFIID. The MLL multiprotein complex seems to remodel, acetylate, deacetylate, and methylate nucleosomes and/or free histones. MLL contains a SET domain characteristic for histone H3 lysine-4-specific methyltransferases. Oncogenic MLL fusion proteins appear to alter the methyltransferase activity of wild-type MLL.
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.