Not exact matches
To date, only two
residues involved
in forming ubiquitin chains,
lysine 48 and
lysine 63, have been linked to autophagy.
The new system allowed the team to add a third
residue —
lysine 33 — to ubiquitin's repertoire
in controlling this cellular housekeeping system.
They next undertook targeted sequencing of the
lysine - 27
residue in all 16 genes that code for H3 isoforms
in a validation cohort comprising 43 DIPGs and 36 non-brainstem glioblastomas.
Substrate peptides used
in this assay were: the first 25
residues of histone 3 [H3 (1 - 25)-RSB- for G9a, EHMT1 and SETD7 at 10, 20 and 100 µM respectively; the first 24
residues of histone 4 [H4 (1 - 24)-RSB- at 10 and 500 µM for PRMT3 and SETD8 respectively; and H3K9Me1 [H3 (1 - 15), monomethylated at
lysine 9] at 200 µM for SUV39H2.
He introduced a number of important techniques
in chemical modification of proteins,
in particular based on reversible amidination and trifluoroacetylation of
lysine residues.