Source:http://linkedlifedata.com/resource/pubmed/id/16431218
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
2006-1-24
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pubmed:abstractText |
We generated extracellular signal-regulated kinase 1/2 (ERK1/2) mutants by introducing a single amino-acid substitution in subdomain V of the catalytic domain and then examined the susceptibility of these mutants to PP1 derivatives originally designed as Src inhibitors. Substituting smaller amino acids (alanine [Ala (A)] or glycine [Gly (G)]) for glutamine [Gln (Q)] in subdomain V drastically increased the susceptibility of ERK1/2 to 1-naphthyl PP1 (1NA-PP1). Wild-type ERK1/2 was resistant to 1NA-PP1 inhibition. ERK1(Q122A) and ERK2(Q103A) were inhibited by 1NA-PP1 at IC(50) values of 1.7 +/- 0.13 and 2.1 +/- 0.18 microM, respectively. ERK1(Q122G) and ERK2(Q103G) were inhibited by 1NA-PP1 with IC(50) values of 3.6 +/- 0.26 and 18 +/- 2.2 microM, respectively. Other derivatives of PP1 (1-naphthylmethyl PP1 and 2-naphthylmethyl PP1) did not significantly inhibit ERK1/2 and its various mutants. In addition, these ERK1/2 mutants were activated by TPA when they were expressed in mammalian cells. These results suggest that the Gln residue of subdomain V is important in determining the susceptibility of ERK1/2 to 1NA-PP1 without significant changes in their enzymatic characteristics.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/4-amino-5-(4-methylphenyl)-7-(tert-b...,
http://linkedlifedata.com/resource/pubmed/chemical/Mitogen-Activated Protein Kinase 1,
http://linkedlifedata.com/resource/pubmed/chemical/Pyrazoles,
http://linkedlifedata.com/resource/pubmed/chemical/Pyrimidines
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pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
0006-291X
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
3
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pubmed:volume |
341
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
261-5
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pubmed:dateRevised |
2009-11-19
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pubmed:meshHeading |
pubmed-meshheading:16431218-Amino Acid Sequence,
pubmed-meshheading:16431218-Amino Acid Substitution,
pubmed-meshheading:16431218-Enzyme Activation,
pubmed-meshheading:16431218-Mitogen-Activated Protein Kinase 1,
pubmed-meshheading:16431218-Molecular Sequence Data,
pubmed-meshheading:16431218-Mutagenesis, Site-Directed,
pubmed-meshheading:16431218-Pyrazoles,
pubmed-meshheading:16431218-Pyrimidines,
pubmed-meshheading:16431218-Structure-Activity Relationship
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pubmed:year |
2006
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pubmed:articleTitle |
A single amino-acid change in ERK1/2 makes the enzyme susceptible to PP1 derivatives.
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pubmed:affiliation |
Unit for Molecular Neurobiology of Learning and Memory, Initial Research Project, Okinawa Institute of Science and Technology, Uruma, Japan. sendo@irp.oist.jp
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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