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Gene Review

MAP1A  -  methionine aminopeptidase 1A

Arabidopsis thaliana

Synonyms: F4L23.25
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High impact information on MAP1A

  • Three enzymes, MAP1A, MAP2A, and MAP2B, have been identified in the cytoplasm of Arabidopsis (Arabidopsis thaliana) [1].
  • In the absence of MAP2 activity, the severity of the phenotype in the MAP1A knocked-down lines was correlated to the extent of MAP1A mRNA accumulation [1].
  • In the MAP1A KO context, modulating MAP2 activity by treatment with various concentrations of the specific drug fumagillin impaired plant development, with particularly strong effects on the root system [1].

Other interactions of MAP1A

  • MAP transcript quantification revealed a predominance of MAP2B and developmental and organ-specific regulation of both MAP1A and MAP2s [1].


  1. Functional and developmental impact of cytosolic protein N-terminal methionine excision in Arabidopsis. Ross, S., Giglione, C., Pierre, M., Espagne, C., Meinnel, T. Plant Physiol. (2005) [Pubmed]
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