Gene Set: ISSAEVA_MLL2_TARGETS

Standard name ISSAEVA_MLL2_TARGETS
Systematic name M2281
Brief description Genes down-regulated in HeLa cells upon knockdown of MLL2 [GeneID=8085] by RNAi.
Full description or abstract ALR (MLL2) is a member of the human MLL family, which belongs to a larger SET1 family of histone methyltransferases. We found that ALR is present within a stable multiprotein complex containing a cohort of proteins shared with other SET1 family complexes and several unique components, such as PTIP and the jumonji family member UTX. Like other complexes formed by SET1 family members, the ALR complex exhibited strong H3K4 methyltransferase activity, conferred by the ALR SET domain. By generating ALR knockdown cell lines and comparing their expression profiles to that of control cells, we identified a set of genes whose expression is activated by ALR. Some of these genes were identified by chromatin immunoprecipitation as direct ALR targets. The ALR complex was found to associate in an ALR-dependent fashion with promoters and transcription initiation sites of target genes and to induce H3K4 trimethylation. The most characteristic features of the ALR knockdown cells were changes in the dynamics and mode of cell spreading/polarization, reduced migration capacity, impaired anchorage-dependent and -independent growth, and decreased tumorigenicity in mice. Taken together, our results suggest that ALR is a transcriptional activator that induces the transcription of target genes by covalent histone modification. ALR appears to be involved in the regulation of adhesion-related cytoskeletal events, which might affect cell growth and survival.
Collection C2: curated gene sets
      CGP: chemical and genetic perturbations
Source publication Pubmed 17178841   Authors: Issaeva I,Zonis Y,Rozovskaia T,Orlovsky K,Croce CM,Nakamura T,Mazo A,Eisenbach L,Canaani E
Exact source Table 1S
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Organism Homo sapiens
Contributed by Arthur Liberzon (MSigDB Team)
Source platform HUMAN_SEQ_ACCESSION
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Version history 3.1: First introduced

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