Identification of a New Member of the Tryptase Family of Mouse and Human Mast Cell Proteases Which Possesses a Novel COOH-terminal Hydrophobic Extension

Mapping of the tryptase locus on chromosome 17 revealed a novel gene 2.3 kilobase 3′ of the mouse mast cell protease (mMCP) 6 gene. This 3.7-kilobase gene encodes the first example of a protease in the tryptase family that contains a membrane-spanning segment located at its COOH terminus. Comparativ...

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Veröffentlicht in:The Journal of biological chemistry 1999-10, Vol.274 (43), p.30784-30793
Hauptverfasser: Wong, Guang W., Tang, Yinzi, Feyfant, Eric, Šali, Andrej, Li, Lixin, Li, Yong, Huang, Chifu, Friend, Daniel S., Krilis, Steven A., Stevens, Richard L.
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container_end_page 30793
container_issue 43
container_start_page 30784
container_title The Journal of biological chemistry
container_volume 274
creator Wong, Guang W.
Tang, Yinzi
Feyfant, Eric
Šali, Andrej
Li, Lixin
Li, Yong
Huang, Chifu
Friend, Daniel S.
Krilis, Steven A.
Stevens, Richard L.
description Mapping of the tryptase locus on chromosome 17 revealed a novel gene 2.3 kilobase 3′ of the mouse mast cell protease (mMCP) 6 gene. This 3.7-kilobase gene encodes the first example of a protease in the tryptase family that contains a membrane-spanning segment located at its COOH terminus. Comparative structural studies indicated that the putative transmembrane tryptase (TMT) possesses a unique substrate-binding cleft. As assessed by RNA blot analyses, mTMT is expressed in mice in both strain- and tissue-dependent manners. Thus, different transcriptional and/or post-transcriptional mechanisms are used to control the expression of mTMT in vivo. Analysis of the corresponding tryptase locus in the human genome resulted in the isolation and characterization of the hTMT gene. ThehTMT transcript is expressed in numerous tissues and is also translated. Analysis of the tryptase family of genes in mice and humans now indicates that a primordial serine protease gene duplicated early and often during the evolution of mammals to generate a panel of homologous tryptases in each species that differ in their tissue expression, substrate specificities, and physical properties.
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subjects Amino Acid Sequence
Animals
Base Sequence
Cell Membrane - enzymology
chromosome 17
Chromosome Mapping
Chymases
Cloning, Molecular
Female
Genome, Human
hTMT gene
Humans
Kinetics
Male
Mast Cells - enzymology
Mice
Mice, Inbred BALB C
Mice, Inbred C57BL
mMCP6 gene
Molecular Sequence Data
mTMT gene
Organ Specificity
Protein Biosynthesis
Recombinant Proteins - chemistry
Restriction Mapping
Sequence Alignment
Sequence Homology, Amino Acid
Serine Endopeptidases - chemistry
Serine Endopeptidases - genetics
serine proteinase
Transcription, Genetic
Tryptases
title Identification of a New Member of the Tryptase Family of Mouse and Human Mast Cell Proteases Which Possesses a Novel COOH-terminal Hydrophobic Extension
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