Abstract
We have identified a second human homology of the yeast Ste20 protein kinase family, which we designate MST2. MST2 is most similar to the previously identified MST1 protein kinase (78% identity, 88% similarity). Northern analysis indicates that MST2 mRNA is expressed at high levels in adult kidney, skeletal and placental tissues and at very low levels in adult heart, lung, liver and brain tissues. An in vitro kinase assay indicates that MST2 can phosphorylate an exogenous substrate, as well as itself, and phospho-amino-acid analysis indicates that it is a serine/threonine protein kinase. The identification of MST2 suggests that there may be subfamilies of Ste20-like protein kinases and that MST1 and MST2 may define one of these subfamilies.
Publication types
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Comparative Study
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Adult
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Amino Acid Sequence
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Base Sequence
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Cloning, Molecular
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DNA Primers / chemistry
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Gene Expression
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Humans
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Intracellular Signaling Peptides and Proteins
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MAP Kinase Kinase Kinases
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Molecular Sequence Data
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Protein Serine-Threonine Kinases / chemistry
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Protein Serine-Threonine Kinases / genetics*
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RNA, Messenger / genetics
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Saccharomyces cerevisiae Proteins*
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Sequence Alignment
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Sequence Homology, Amino Acid
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Serine-Threonine Kinase 3
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Tissue Distribution
Substances
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DNA Primers
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Intracellular Signaling Peptides and Proteins
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RNA, Messenger
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Saccharomyces cerevisiae Proteins
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Protein Serine-Threonine Kinases
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STK3 protein, human
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Serine-Threonine Kinase 3
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MAP Kinase Kinase Kinases
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STE20 protein, S cerevisiae