Bifunctional peptidase and arginyl-hydroxylase JMJD5 - Q8N371 (KDM8_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Endopeptidase that cleaves histones N-terminal tails at the carboxyl side of methylated arginine or lysine residues, to generate 'tailless nucleosomes', which may trigger transcription elongation (PubMed:28847961, PubMed:29459673, PubMed:28982940). Preferentially recognizes and cleaves monomethylated and dimethylated arginine residues of histones H2, H3 and H4. After initial cleavage, continues to digest histones tails via its aminopeptidase activity (PubMed:28847961, PubMed:29459673). Upon DNA damage, cleaves the N-terminal tail of histone H3 at monomethylated lysine residues, preferably at monomethylated 'Lys-9' (H3K9me1). The histone variant H3F3A is the major target for cleavage (PubMed:28982940). Additionnally, acts as a Fe(2+) and 2-oxoglutarate-dependent oxygenase, catalyzing (R)-stereospecific hydroxylation at C-3 of 'Arg-137' of RPS6 and 'Arg-141' of RCCD1, but the biological significance of this activity remains to be established (PubMed:29563586). Regulates mitosis through different mechanisms: Plays a role in transcriptional repression of satellite repeats, possibly by regulating H3K36 methylation levels in centromeric regions together with RCCD1. Possibly together with RCCD1, is involved in proper mitotic spindle organization and chromosome segregation (PubMed:24981860). Negatively regulates cell cycle repressor CDKN1A/p21, which controls G1/S phase transition (PubMed:24740926). Required for G2/M phase cell cycle progression. Regulates expression of CCNA1/cyclin-A1, leading to cancer cell proliferation (PubMed:20457893). Also, plays a role in regulating alpha-tubulin acetylation and cytoskeletal microtubule stability involved in epithelial to mesenchymal transition (PubMed:28455245). UniProt
Catalytic Activity
2-oxoglutarate + L-arginyl-[protein] + O2 = 3R-3-hydroxy-L-arginyl-[protein] + CO2 + succinate UniProt
Pathway Maps
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Subunit Structure
Can form homodimers (via JmjC domain) (PubMed:24100311, PubMed:28982940). Found in a complex with RCCD1 (PubMed:24981860). Interacts (via N-terminus) with RCCD1 (via N-terminus); this interaction stimulates H3K36me3 and H3K36me2 demethylation (PubMed:28455245, PubMed:24981860). Interacts (via JmjC domain) with HIST1H3A (PubMed:28982940). UniProt
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Data in blue originates from PDB
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