- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- Molecular cloning of a human putative 7-transmembrane...
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
Molecular cloning of a human putative 7-transmembrane segment (7TMS) receptor Federsppiel, Bartolome S. S.
Abstract
Seven transmembrane-segment (7TMS) receptors are highly homologous proteins that mediate a variety of cell functions through the interaction with G-proteins. They are important mediators in the response to neurotransmitters, hormones and cytokines. Moreover, two of these receptors have been found to be proto-oncogenes or to possess transforming activity. During the immune response they are involved in inflammation, producing and modulating this process through the interaction with ligands that are primarily chemotactic and activating factors. A family of such ligands has already been characterized and their receptors, when known, were all of the 7TMS type. To further investigate this category of proteins in cells involved in immunity a group of oligonucleotides was patterned on predicted conserved areas of chemotactic 7TMS receptors, and also on divergent non-homologous sequences. To facilitate subcloning procedures restriction sites where engineered at the 5'-end of the primers. Human monocyte mRNA was converted to single strand cDNA by antisense priming and reverse transcription. This cDNA was used as a template for the in vitro enzymatic amplification by the polymerase chain reaction (PCR) with upstream and downstream primers. The amplified cDNA (388 bp) was cloned in plasmid Bluescript and sequenced by the chain termination method. Homology searches for the sequence revealed that the fragment belonged to the 7TMS superfamily. The cDNA was radiolabeled and used to screen a human fetal spleen library constructed in the ƛ-phage system. A clone was isolated that when sequenced revealed a complete open reading frame for a 352 residue protein. This polypeptide was found to be a human homologue of a neuropeptide receptor: neuropeptide tyrosine (NPY) subtype 3. Apart from having the typical topology of the 7TMS superfamily it also displayed a high degree of homology to chemotactic factor receptors. Northern blot analysis demonstrated that this protein is expressed in locations outside the nervous system like spleen and thymus.
Item Metadata
Title |
Molecular cloning of a human putative 7-transmembrane segment (7TMS) receptor
|
Creator | |
Publisher |
University of British Columbia
|
Date Issued |
1992
|
Description |
Seven transmembrane-segment (7TMS) receptors are highly
homologous proteins that mediate a variety of cell functions through
the interaction with G-proteins. They are important mediators in the
response to neurotransmitters, hormones and cytokines. Moreover,
two of these receptors have been found to be proto-oncogenes or to
possess transforming activity. During the immune response they are
involved in inflammation, producing and modulating this process
through the interaction with ligands that are primarily chemotactic
and activating factors. A family of such ligands has already been
characterized and their receptors, when known, were all of the 7TMS
type. To further investigate this category of proteins in cells
involved in immunity a group of oligonucleotides was patterned on
predicted conserved areas of chemotactic 7TMS receptors, and also
on divergent non-homologous sequences. To facilitate subcloning
procedures restriction sites where engineered at the 5'-end of the
primers. Human monocyte mRNA was converted to single strand cDNA
by antisense priming and reverse transcription. This cDNA was used
as a template for the in vitro enzymatic amplification by the
polymerase chain reaction (PCR) with upstream and downstream
primers. The amplified cDNA (388 bp) was cloned in plasmid
Bluescript and sequenced by the chain termination method. Homology
searches for the sequence revealed that the fragment belonged to
the 7TMS superfamily. The cDNA was radiolabeled and used to screen
a human fetal spleen library constructed in the ƛ-phage system. A
clone was isolated that when sequenced revealed a complete open reading frame for a 352 residue protein. This polypeptide was found
to be a human homologue of a neuropeptide receptor: neuropeptide
tyrosine (NPY) subtype 3. Apart from having the typical topology of
the 7TMS superfamily it also displayed a high degree of homology to
chemotactic factor receptors. Northern blot analysis demonstrated
that this protein is expressed in locations outside the nervous
system like spleen and thymus.
|
Extent |
5170085 bytes
|
Genre | |
Type | |
File Format |
application/pdf
|
Language |
eng
|
Date Available |
2008-12-15
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
DOI |
10.14288/1.0086516
|
URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
|
Graduation Date |
1992-11
|
Campus | |
Scholarly Level |
Graduate
|
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.