Title : Phosphohistidine phosphatase 1 (PHPT1) also dephosphorylates phospholysine of chemically phosphorylated histone H1 and polylysine.

Pub. Date : 2015 Mar

PMID : 25574816






13 Functional Relationships(s)
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1 Phosphohistidine phosphatase 1 (PHPT1) also dephosphorylates phospholysine of chemically phosphorylated histone H1 and polylysine. phospholysine phosphohistidine phosphatase 1 Homo sapiens
2 Phosphohistidine phosphatase 1 (PHPT1) also dephosphorylates phospholysine of chemically phosphorylated histone H1 and polylysine. phospholysine phosphohistidine phosphatase 1 Homo sapiens
3 BACKGROUND: Phosphohistidine phosphatase 1 (PHPT1), also named protein histidine phosphatase (PHP), is a eukaryotic enzyme dephosphorylating proteins and peptides that are phosphorylated on a histidine residue. Histidine phosphohistidine phosphatase 1 Homo sapiens
4 BACKGROUND: Phosphohistidine phosphatase 1 (PHPT1), also named protein histidine phosphatase (PHP), is a eukaryotic enzyme dephosphorylating proteins and peptides that are phosphorylated on a histidine residue. Histidine phosphohistidine phosphatase 1 Homo sapiens
5 Their dephosphorylation by recombinant human PHPT1 was investigated by using a DEAE-Sepharose spin column technique earlier developed by us for studies on basic phosphoproteins and phosphopeptides. deae-sepharose phosphohistidine phosphatase 1 Homo sapiens
6 Mass spectrometry (MS) was used to investigate the occurrence of N-epsilon-phospholysine residues in a phosphorylated histone H1.2 preparation, and to measure the activity of PHPT1 against free N-omega-phosphoarginine. n-omega-phosphoarginine phosphohistidine phosphatase 1 Homo sapiens
7 RESULTS: Histone H1.2, which lacks histidine, was phosphorylated by phosphoramidate on several lysine residues, as shown by MS. PHPT1 was shown to dephosphorylate phosphohistone H1 at a rate similar to that previously described for the dephosphorylation of phosphohistidine-containing peptides. Histidine phosphohistidine phosphatase 1 Homo sapiens
8 RESULTS: Histone H1.2, which lacks histidine, was phosphorylated by phosphoramidate on several lysine residues, as shown by MS. PHPT1 was shown to dephosphorylate phosphohistone H1 at a rate similar to that previously described for the dephosphorylation of phosphohistidine-containing peptides. phosphoramidic acid phosphohistidine phosphatase 1 Homo sapiens
9 RESULTS: Histone H1.2, which lacks histidine, was phosphorylated by phosphoramidate on several lysine residues, as shown by MS. PHPT1 was shown to dephosphorylate phosphohistone H1 at a rate similar to that previously described for the dephosphorylation of phosphohistidine-containing peptides. Lysine phosphohistidine phosphatase 1 Homo sapiens
10 RESULTS: Histone H1.2, which lacks histidine, was phosphorylated by phosphoramidate on several lysine residues, as shown by MS. PHPT1 was shown to dephosphorylate phosphohistone H1 at a rate similar to that previously described for the dephosphorylation of phosphohistidine-containing peptides. phosphohistidine phosphohistidine phosphatase 1 Homo sapiens
11 In addition, phosphopolylysine was an equally good substrate for PHPT1. phosphopolylysine phosphohistidine phosphatase 1 Homo sapiens
12 CONCLUSION: The finding that PHPT1 can dephosphorylate phospholysine in chemically phosphorylated histone H1 and polylysine demonstrates a broader specificity for this enzyme than known so far. phospholysine phosphohistidine phosphatase 1 Homo sapiens
13 CONCLUSION: The finding that PHPT1 can dephosphorylate phospholysine in chemically phosphorylated histone H1 and polylysine demonstrates a broader specificity for this enzyme than known so far. Polylysine phosphohistidine phosphatase 1 Homo sapiens