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UBC Theses and Dissertations
Characterization of an 11s legumin-like storage protein gene from the gymnosperm picea glauca Márquez García, Magdalena Ivonne
Abstract
The amino acid sequence homologies of seed storage proteins in all seed plants, including gymnosperms, suggest that they evolved from a common ancestor. Seed storage protein genes have been extensively studied in angiosperms, however no data regarding the structural organization of the genes in gymnosperrns is available. This is the first report of a gymnosperm seed storage protein gene. A 2 genomic clone containing a Picea uS legumin gene was isolated and characterized. The organization of the gene was found to be similar to angiosperm legumin genes. The nucleotide sequence contains five exons and four introns. The number of introns differs from those in angiosperrns, however the position of the first three introns is highly conserved, as it is in angiosperms. A deletion was found in the third exon. The possibility of this deletion being a cloning artifact is discussed. The deduced amino acid sequence is 509 amino acids long and is 98.7% identical to a previously characterized legumin cDNA from Picea glauca. lmino acid comparisons of the legumin genes of Picea and other species showed the presence of highly conserved sequences. Putative regulatory sequences were found in the 5’ flanking sequence of the Picea uS legumin gene by comparisons between Picea uS legumin promoter and angiosperm SSP promoters.
Item Metadata
Title |
Characterization of an 11s legumin-like storage protein gene from the gymnosperm picea glauca
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1994
|
Description |
The amino acid sequence homologies of seed storage
proteins in all seed plants, including gymnosperms,
suggest that they evolved from a common ancestor. Seed
storage protein genes have been extensively studied in
angiosperms, however no data regarding the structural
organization of the genes in gymnosperrns is available.
This is the first report of a gymnosperm seed storage
protein gene. A 2 genomic clone containing a Picea uS
legumin gene was isolated and characterized. The
organization of the gene was found to be similar to
angiosperm legumin genes. The nucleotide sequence contains
five exons and four introns. The number of introns
differs from those in angiosperrns, however the position of
the first three introns is highly conserved, as it is in
angiosperms. A deletion was found in the third exon. The
possibility of this deletion being a cloning artifact is
discussed. The deduced amino acid sequence is 509 amino
acids long and is 98.7% identical to a previously
characterized legumin cDNA from Picea glauca. lmino acid
comparisons of the legumin genes of Picea and other
species showed the presence of highly conserved sequences.
Putative regulatory sequences were found in the 5’
flanking sequence of the Picea uS legumin gene by
comparisons between Picea uS legumin promoter and
angiosperm SSP promoters.
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Extent |
1545231 bytes
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Genre | |
Type | |
File Format |
application/pdf
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Language |
eng
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Date Available |
2009-03-03
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Provider |
Vancouver : University of British Columbia Library
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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.
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DOI |
10.14288/1.0087450
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Graduation Date |
1994-11
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
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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.