An integrated comparative phosphoproteomic and bioinformatic approach reveals a novel class of MPM-2 motifs upregulated in EGFRvIII-expressing glioblastoma cells.
An integrated comparative phosphoproteomic and bioinformatic approach reveals a novel class of MPM-2 motifs upregulated in EGFRvIII-expressing glioblastoma cells.
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DOI:
10.1039/b815075c
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发表时间:
2009-01
影响因子:
--
通讯作者:
White FM
中科院分区:
文献类型:
--
作者:
Joughin BA;Naegle KM;Huang PH;Yaffe MB;Lauffenburger DA;White FM
Glioblastoma (GBM, WHO grade IV) is an aggressively proliferative and invasive brain tumor that carries a poor clinical prognosis with a median survival of 9 to 12 months. In a prior phosphoproteomic study performed in the U87MG glioblastoma cell line, we identified tyrosine phosphorylation events that are regulated as a result of titrating EGFRvIII, a constitutively active mutant of the epidermal growth factor receptor (EGFR) associated with poor prognosis in GBM patients. In the present study, we have used the phosphoserine/phosphothreonine-specific antibody MPM-2 (mitotic protein monoclonal #2) to quantify serine/threonine phosphorylation events in the same cell lines. By employing a bioinformatic tool to identify amino acid sequence motifs regulated in response to increasing oncogene levels, a set of previously undescribed MPM-2 epitope sequence motifs orthogonal to the canonical “pS/pT-P” motif was identified. These motifs contain acidic amino acids in combinations of the −5, −2, +1, +3, and +5 positions relative to the phosphorylated amino acid. Phosphopeptides containing these motifs are upregulated in cells expressing EGFRvIII, raising the possibility of a general role for a previously unrecognized acidophilic kinase (e.g. casein kinase II (CK2)) in cell proliferation downstream of EGFR signaling.
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影响因子:
11.5
作者:
Ha, SA;Shin, SM;Kim, JW
通讯作者:
Kim, JW
DOI:
10.1073/pnas.80.10.2926
发表时间:
1983-01-01
期刊:
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子:
--
作者:
DAVIS, FM;TSAO, TY;RAO, PN
通讯作者:
RAO, PN
DOI:
10.1111/j.1432-1033.1988.tb13765.x
发表时间:
1988-01-15
期刊:
EUROPEAN JOURNAL OF BIOCHEMISTRY
影响因子:
--
作者:
MULNERLORILLON, O;MAROT, J;BELLE, R
通讯作者:
BELLE, R
影响因子:
14.9
作者:
Obenauer, JC;Cantley, LC;Yaffe, MB
通讯作者:
Yaffe, MB
影响因子:
14.9
作者:
Diella F;Gould CM;Chica C;Via A;Gibson TJ
通讯作者:
Gibson TJ