Patterns of molecular evolution in pathogenesis-related proteins
Genet. mol. biol
; 28(4): 645-653, Dec. 2005. tab
Article
in English
| LILACS
| ID: lil-450987
Responsible library:
BR26.1
ABSTRACT
The genes encoding 13 classes of pathogenesis-related (PR) proteins were examined for positive selection using maximum-likelihood (ML) models of codon substitution. The study involved 194 sequences from 54 species belonging to 37 genera. Although the sizes of the sequences examined varied from 237 bp for PR12 to 1,110 bp for PR7, most classes (9 out of 13) contained sequences made up of more than 400 nucleotides. Signs of positive selection were obtained for sites in PR proteins 4, 6, 8, 9 and 15 using an ML-based Bayesian method and likelihood ratio tests. These results confirm the importance of positive selection in proteins related to defense mechanisms already observed in a wide array of organisms
Full text:
Available
Collection:
International databases
Database:
LILACS
Main subject:
Plant Proteins
/
Evolution, Molecular
Type of study:
Etiology study
Language:
English
Journal:
Genet. mol. biol
Journal subject:
Genetics
Year:
2005
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Pontifícia Universidade Católica do Rio Grande do Sul/BR
/
Universidade Federal do Rio Grande do Sul/BR