Abstract
A cholecystokinin (CCK) precursor cDNA of 782 bp was identified from goldfish brain. The open reading frame (369 bp) encodes the 123 amino acid precursor which contains mono- and di-basic amino acid endoproteolytic cleavage, C-terminal alpha-amidation and tyrosyl sulfation sites. Expression studies revealed the presence of preproCCK mRNA in the gastrointestinal tract, pituitary and a wide range of brain areas from the olfactory bulbs to the posterior brain region. We have also confirmed the presence of CCK mRNA in the posterior ventrolateral hypothalamus by in situ hybridization, supporting a role of CCK in feeding behavior and regulation of pituitary hormone secretion.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Amino Acid Sequence
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Animals
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Base Sequence
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Brain / metabolism*
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Cholecystokinin / genetics*
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Cholecystokinin / physiology
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Cloning, Molecular
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DNA Primers / genetics
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DNA, Complementary / genetics*
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Feeding Behavior / physiology
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Female
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Gastrins / genetics
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Gastrins / physiology
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Gene Expression
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Goldfish / genetics*
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Goldfish / metabolism*
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Goldfish / physiology
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Humans
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Hypothalamus, Posterior / metabolism
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In Situ Hybridization
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Male
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Molecular Sequence Data
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Polymerase Chain Reaction
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Protein Precursors / genetics*
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Protein Precursors / physiology
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RNA, Messenger / genetics
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RNA, Messenger / metabolism
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Sequence Homology, Amino Acid
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Tissue Distribution
Substances
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DNA Primers
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DNA, Complementary
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Gastrins
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Protein Precursors
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RNA, Messenger
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preprocholecystokinin
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Cholecystokinin