@ARTICLE{TreeBASE2Ref14538,
author = {Andrew J Alverson},
title = {Strong purifying selection in the silicon transporters of marine and freshwater diatoms},
year = {2007},
keywords = {},
doi = {},
url = {},
pmid = {},
journal = {Limnology and Oceanography},
volume = {52},
number = {},
pages = {1420--1429},
abstract = {Marine and freshwater diatoms show several important differences in silicon physiology. In addition to containing an order of magnitude more silica in their cell walls, freshwater diatoms also appear to have a less efficient silicic acid uptake mechanism. A novel set of silicon transporters (SITs), encoded by a small gene family, import silicic acid from the environment into the diatom cell. Some evidence suggests that the disparity in uptake efficiency between marine and freshwater diatoms might be attributable to different demands on SITs in the two environments. To test this hypothesis, partial SIT genes were cloned and sequenced from 45 species of Thalassiosirales, a diatom lineage with high diversity in marine and freshwaters. Phylogenetically based codon substitution models were used to test whether SITs from marine and freshwater taxa were under similar selective constraints and whether codons in different structural locations of the protein were under similar functional constraints. Purifying selection is the predominant evolutionary force acting on SITs, irrespective of location in the protein, and differences in efficiency of silicic acid uptake between marine and freshwater diatoms are not due to sequence differences in SITs.}
}
Citation for Study 2047
Citation title:
"Strong purifying selection in the silicon transporters of marine and freshwater diatoms".
This study was previously identified under the legacy study ID S2046
(Status: Published).
Citation
Alverson A. 2007. Strong purifying selection in the silicon transporters of marine and freshwater diatoms. Limnology and Oceanography, 52: 1420-1429.
Authors
Abstract
Marine and freshwater diatoms show several important differences in silicon physiology. In addition to containing an order of magnitude more silica in their cell walls, freshwater diatoms also appear to have a less efficient silicic acid uptake mechanism. A novel set of silicon transporters (SITs), encoded by a small gene family, import silicic acid from the environment into the diatom cell. Some evidence suggests that the disparity in uptake efficiency between marine and freshwater diatoms might be attributable to different demands on SITs in the two environments. To test this hypothesis, partial SIT genes were cloned and sequenced from 45 species of Thalassiosirales, a diatom lineage with high diversity in marine and freshwaters. Phylogenetically based codon substitution models were used to test whether SITs from marine and freshwater taxa were under similar selective constraints and whether codons in different structural locations of the protein were under similar functional constraints. Purifying selection is the predominant evolutionary force acting on SITs, irrespective of location in the protein, and differences in efficiency of silicic acid uptake between marine and freshwater diatoms are not due to sequence differences in SITs.
About this resource
- Canonical resource URI:
http://purl.org/phylo/treebase/phylows/study/TB2:S2047
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- Show BibTeX reference
@ARTICLE{TreeBASE2Ref14538,
author = {Andrew J Alverson},
title = {Strong purifying selection in the silicon transporters of marine and freshwater diatoms},
year = {2007},
keywords = {},
doi = {},
url = {},
pmid = {},
journal = {Limnology and Oceanography},
volume = {52},
number = {},
pages = {1420--1429},
abstract = {Marine and freshwater diatoms show several important differences in silicon physiology. In addition to containing an order of magnitude more silica in their cell walls, freshwater diatoms also appear to have a less efficient silicic acid uptake mechanism. A novel set of silicon transporters (SITs), encoded by a small gene family, import silicic acid from the environment into the diatom cell. Some evidence suggests that the disparity in uptake efficiency between marine and freshwater diatoms might be attributable to different demands on SITs in the two environments. To test this hypothesis, partial SIT genes were cloned and sequenced from 45 species of Thalassiosirales, a diatom lineage with high diversity in marine and freshwaters. Phylogenetically based codon substitution models were used to test whether SITs from marine and freshwater taxa were under similar selective constraints and whether codons in different structural locations of the protein were under similar functional constraints. Purifying selection is the predominant evolutionary force acting on SITs, irrespective of location in the protein, and differences in efficiency of silicic acid uptake between marine and freshwater diatoms are not due to sequence differences in SITs.}
}
- Show RIS reference
TY - JOUR
ID - 14538
AU - Alverson,Andrew J
T1 - Strong purifying selection in the silicon transporters of marine and freshwater diatoms
PY - 2007
UR -
N2 - Marine and freshwater diatoms show several important differences in silicon physiology. In addition to containing an order of magnitude more silica in their cell walls, freshwater diatoms also appear to have a less efficient silicic acid uptake mechanism. A novel set of silicon transporters (SITs), encoded by a small gene family, import silicic acid from the environment into the diatom cell. Some evidence suggests that the disparity in uptake efficiency between marine and freshwater diatoms might be attributable to different demands on SITs in the two environments. To test this hypothesis, partial SIT genes were cloned and sequenced from 45 species of Thalassiosirales, a diatom lineage with high diversity in marine and freshwaters. Phylogenetically based codon substitution models were used to test whether SITs from marine and freshwater taxa were under similar selective constraints and whether codons in different structural locations of the protein were under similar functional constraints. Purifying selection is the predominant evolutionary force acting on SITs, irrespective of location in the protein, and differences in efficiency of silicic acid uptake between marine and freshwater diatoms are not due to sequence differences in SITs.
L3 -
JF - Limnology and Oceanography
VL - 52
IS -
SP - 1420
EP - 1429
ER -
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