PMID: 2110547May 1, 1990Paper

Characterization and chromosomal mapping of a cDNA encoding tryptophan hydroxylase from a mouse mastocytoma cell line

Genomics
J StollD Goldman

Abstract

A cDNA library was constructed from RNA prepared from P815 mouse mastocytoma cells and screened for tryptophan hydroxylase. An essentially full-length clone that recognizes a major mRNA species of 1.9 kb in mastocytoma cell lines and in pineal gland, duodenum, and brainstem of the mouse was obtained. The predicted amino acid sequence of this mouse mastocytoma clone showed 97 and 87% identity, respectively, with tryptophan hydroxylase clones isolated from rat and rabbit pineal glands, but the mouse clone contains an unusual 3-amino-acid duplication near the N-terminus and lacks a phosphorylation site. A fragment of the cDNA produced an enzymatically active protein when expressed in Escherichia coli, thus demonstrating that the catalytic domain is included in the C-terminal 380 amino acids. The mouse tryptophan hydroxylase locus, termed Tph, was mapped by Southern blot analysis of somatic cell hybrids and by an interspecific backcross to a position in the proximal half of chromosome 7. Because TPH has been mapped to human chromosome 11, this assignment further defines regions of homology between these mouse and human chromosomes.

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Citations

Apr 1, 1991·Journal of Neuroscience Research·J Stoll, D Goldman
Jan 1, 1992·Mammalian Genome : Official Journal of the International Mammalian Genome Society·E M RinchikJ Peters
Jan 1, 1991·Mammalian Genome : Official Journal of the International Mammalian Genome Society·E M RinchikJ Peters
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Jan 1, 1992·Mammalian Genome : Official Journal of the International Mammalian Genome Society·J H NadeauT H Roderick
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