Gene Details:

• Gene ID:
• Gene Symbol: PttEXPA1
• Gene Name: alpha-expansin 1
• Genome:
• Species: Populus tremula x Populus tremuloides

Functional Descriptions:

• Ectopic expression of a wood-abundant expansin PttEXPA1 promotes cell expansion in primary and secondary tissues in aspen.
• PttEXPA1 belongs to Subfamily A of α-expansins that have conserved motifs at the N- and C-termini of the mature protein. When PttEXPA1 was over-expressed in aspen, an extract of the cell wall-bound proteins of the transgenic plants exhibited an increased expansin activity on cellulose–xyloglucan composites in vitro, indicating that PttEXPA1 is an active expansin.
• The transgenic lines exhibited increased stem internode elongation and leaf expansion, and larger cell sizes in the leaf epidermis, indicating that PttEXPA1 protein is capable of increasing the growth of these organs by enhancing cell wall expansion in planta.
• PttEXPA1 stimulated fibre, but not vessel element, diameter growth, and marginally increased vessel element length, but did not affect fibre length.

Function-related keywords:

• leaf ,  stem ,  growth ,  cell-wall ,  cellulose ,  cell-elongation ,  internode-length ,  internode-elongation ,  cell-expansion ,  epidermis ,  secondary-cell-wall ,  protein

Literature:

• Ectopic expression of a wood-abundant expansin PttEXPA1 promotes cell expansion in primary and secondary tissues in aspen.   DOI:  10.1111/j.1467-7652.2007.00295.x ;  PMID:  17908207

Related News:

Gene Resources:

• NCBI ID: AY435099.1
• UniProt accessions: Q6T5H7

Orthologs:

Sequences:

• CDS Sequence:
• Protein Sequence: