Linked Life Data

20182746

Source:http://linkedlifedata.com/resource/pubmed/id/20182746

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-3-18
pubmed:abstractText
The plant RNase T2 family is divided into two different subfamilies. S-RNases are involved in rejection of self-pollen during the establishment of self-incompatibility in three plant families. S-like RNases, on the other hand, are not involved in self-incompatibility, and although gene expression studies point to a role in plant defense and phosphate recycling, their biological roles are less well understood. Although S-RNases have been subjects of many phylogenetic studies, few have included an extensive analysis of S-like RNases, and genome-wide analyses to determine the number of S-like RNases in fully sequenced plant genomes are missing. We characterized the eight RNase T2 genes present in the Oryza sativa genome; and we also identified the full complement of RNase T2 genes present in other fully sequenced plant genomes. Phylogenetics and gene expression analyses identified two classes among the S-like RNase subfamily. Class I genes show tissue specificity and stress regulation. Inactivation of RNase activity has occurred repeatedly throughout evolution. On the other hand, Class II seems to have conserved more ancestral characteristics; and, unlike other S-like RNases, genes in this class are conserved in all plant species analyzed and most are constitutively expressed. Our results suggest that gene duplication resulted in high diversification of Class I genes. Many of these genes are differentially expressed in response to stress, and we propose that protein characteristics, such as the increase in basic residues can have a defense role independent of RNase activity. On the other hand, constitutive expression and phylogenetic conservation suggest that Class II S-like RNases may have a housekeeping role.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1617-4623
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
283
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
381-96
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
RNase T2 genes from rice and the evolution of secretory ribonucleases in plants.
pubmed:affiliation
Interdepartmental Genetics Program, Iowa State University, 2214 Molecular Biology Bldg., Ames, IA 50011, USA. gustavo@iastate.edu
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't