Human Gene SETD1B (ENST00000619791.1) Description and Page Index

Description: 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-overalpping localization with SETD1A suggests that SETD1A and SETD1B make non-redundant contributions to the epigenetic control of chromatin structure and gene expression. Specifically tri-methylates 'Lys-4' of histone H3 in vitro. (from UniProt Q9UPS6)
Gencode Transcript: ENST00000619791.1
Gencode Gene: ENSG00000139718.11
Transcript (Including UTRs)
Position: hg38 chr12:121,804,738-121,830,239 Size: 25,502 Total Exon Count: 16 Strand: +
Coding Region
Position: hg38 chr12:121,804,738-121,830,239 Size: 25,502 Coding Exon Count: 16

Page Index

Sequence and Links

UniProtKB Comments

Protein Structure

Other Names

Methods

Data last updated at UCSC: 2021-06-20 19:51:40

Comments and Description Text from UniProtKB


	ID: SET1B_HUMAN DESCRIPTION: RecName: Full=Histone-lysine N-methyltransferase SETD1B; EC=2.1.1.43; AltName: Full=Lysine N-methyltransferase 2G; AltName: Full=SET domain-containing protein 1B; Short=hSET1B; 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-overalpping localization with SETD1A suggests that SETD1A and SETD1B make non-redundant contributions to the epigenetic control of chromatin structure and gene expression. Specifically tri-methylates 'Lys-4' of histone H3 in vitro. CATALYTIC ACTIVITY: S-adenosyl-L-methionine + L-lysine-[histone] = S-adenosyl-L-homocysteine + N(6)-methyl-L-lysine-[histone]. SUBUNIT: 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 and ASH2L/ASH2. 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. SUBCELLULAR LOCATION: Nucleus speckle. Chromosome. Note=Localizes to a largely non-overlapping set of euchromatic nuclear speckles with SETD1A, suggesting that SETD1A and SET1B each bind to a unique set of target genes. SIMILARITY: Contains 1 post-SET domain. SIMILARITY: Contains 1 RRM (RNA recognition motif) domain. SIMILARITY: Contains 1 SET domain.