Histone-lysine N-methyltransferase SETD1A - O15047 (SET1A_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

 
Function
Histone methyltransferase that specifically methylates 'Lys-4' of histone H3, when part of the SET1 histone methyltransferase (HMT) complex, but not if the neighboring 'Lys-9' residue is already methylated. H3 'Lys-4' methylation represents a specific tag for epigenetic transcriptional activation. The non-overlapping localization with SETD1B suggests that SETD1A and SETD1B make non-redundant contributions to the epigenetic control of chromatin structure and gene expression. UniProt
Catalytic Activity
L-lysyl4-[histone H3] + 3 S-adenosyl-L-methionine = 3 H+ + N6,N6,N6-trimethyl-L-lysyl4-[histone H3] + 3 S-adenosyl-L-homocysteine UniProt
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Subunit Structure
Component of the SET1 complex, at least composed of the catalytic subunit (SETD1A or SETD1B), WDR5, WDR82, RBBP5, ASH2L/ASH2, CXXC1/CFP1, HCFC1 and DPY30. Interacts with HCFC1. Interacts with ASH2/ASH2L, CXXC1/CFP1 and RBBP5. Interacts (via the RRM domain) with WDR82. Interacts (via the RRM domain) with hyperphosphorylated C-terminal domain (CTD) of RNA polymerase II large subunit (POLR2A) only in the presence of WDR82. Binds specifically to CTD heptad repeats phosphorylated on 'Ser-5' of each heptad. Interacts with ZNF335. Interacts with SUPT6H. Interacts with NAP1L1 (By similarity). Interacts (via WIN motif) with WDR5 (PubMed:17998332, PubMed:22665483, PubMed:22266653). UniProt
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Data in blue originates from PDB
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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