Sequence and characterization of 6 Lea proteins and their genes from cotton

Lea genes code for mRNAs and proteins that are late embryogenesis abundant in higher plant seed embryos. They appear to be ubiquitous in higher plants and may be induced to high levels of expression in other tissues and at other times of ontogeny by ABA and/or desiccation. Presented here are the gen...

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Bibliographic Details
Published in:Plant molecular biology 1988-05, Vol.11 (3), p.277-291
Main Authors: Baker, J, Steele, C, Dure, L. III
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
amino acid composition
amino acid sequences
amino acids
Biological and medical sciences
cdna
cloning
Economic plant physiology
embryo (plant)
Embryo development. Germination
embryogenesis
Fundamental and applied biological sciences. Psychology
Genes. Genome
Gossypium hirsutum
Growth and development
introns
late embryogenesis abundant genes
messenger RNA
Molecular and cellular biology
molecular conformation
Molecular genetics
molecular sequence data
multigene family
nucleotide sequences
plant proteins
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Summary:Lea genes code for mRNAs and proteins that are late embryogenesis abundant in higher plant seed embryos. They appear to be ubiquitous in higher plants and may be induced to high levels of expression in other tissues and at other times of ontogeny by ABA and/or desiccation. Presented here are the genomic and cDNA sequences for 6 of these genes from cotton seed embryos and the derived amino acid sequences of the corresponding proteins. The Lea genes contain the standard sequence features of eucaryotic genes (TATA box and poly (A) addition sequences) and have 1 or more introns. Sequences differences between cDNA and genomic DNA confirm the existence of small multigene families for several Lea genes. The amino acid composition and sequence for the Lea proteins are unusual. Five are extremely hydrophilic, four contain no cys or trp and 4 have sequence domains that suggest amphiphilic helical structures. Hypothetical functions in desiccation survival, based on amino acid sequence, are discussed.
ISSN:0167-4412
1573-5028
DOI:10.1007/BF00027385