The divergence and positive selection of the plant-specific BURP-containing protein family

Ecology and Evolution
Lihui WangYingkao Hu

Abstract

BURP domain-containing proteins belong to a plant-specific protein family and have diverse roles in plant development and stress responses. However, our understanding about the genetic divergence patterns and evolutionary rates of these proteins remain inadequate. In this study, 15 plant genomes were explored to elucidate the genetic origins, divergence, and functions of these proteins. One hundred and twenty-five BURP protein-encoding genes were identified from four main plant lineages, including 13 higher plant species. The absence of BURP family genes in unicellular and multicellular algae suggests that this family (1) appeared when plants shifted from relatively stable aquatic environments to land, where conditions are more variable and stressful, and (2) is critical in the adaptation of plants to adverse environments. Promoter analysis revealed that several responsive elements to plant hormones and external environment stresses are concentrated in the promoter region of BURP protein-encoding genes. This finding confirms that these genes influence plant stress responses. Several segmentally and tandem-duplicated gene pairs were identified from eight plant species. Thus, in general, BURP domain-containing genes have been sub...Continue Reading

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Methods Mentioned

BETA
transgenic
environmental stresses
environmental stress

Software Mentioned

CODEML
MEME ( Multiple Em for Motif Elicitation
Bayes Bayes analysis BEB
MUSCLE ( Multiple Sequence Comparison by Log Expectation )
DIVERGE
MUSCLE ( Multiple Sequence Comparison by Log ‐ Expectation )
MEME
PlantCARE
MEGA
MEGA6

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