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Gene Review

Map7  -  microtubule-associated protein 7

Mus musculus

Synonyms: E-MAP-115, Ensconsin, Epithelial microtubule-associated protein of 115 kDa, MAP-7, Microtubule-associated protein 7, ...
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High impact information on Mtap7


Biological context of Mtap7

  • The distribution of murine 115-kDa epithelial microtubule-associated protein (E-MAP-115) during embryogenesis and in adult organs suggests a role in epithelial polarization and differentiation [4].
  • Analysis of the predicted amino acid sequence of murine E-MAP-115 revealed 81% sequence identity with its human homolog, the best-conserved part of the protein being the microtubule-binding site [4].

Anatomical context of Mtap7

  • The gene trap insertion led to a null allele of the E-MAP-115 gene and, in agreement with its high expression in the testis, male mice homozygous for the mutation were sterile because of deformation of spermatid nuclei and subsequent gradual loss of germ cells [1].
  • In adult organs, E-MAP-115 is most abundant in epithelial cells of kidney tubules, in absorptive cells of the intestine and is widely distributed in the testis [4].
  • The 115-kDa epithelial MAP (E-MAP-115) has been identified as a microtubule-stabilizing protein predominantly expressed in cell lines of epithelial origin [4].
  • Taken together, our results provide support for a role of E-MAP-115 in reorganizing the microtubule cytoskeleton during epithelial cell polarization and differentiation [4].
  • In the developing kidney, E-MAP-115 mRNA is detected in the cuboidal cells of S-shaped bodies, of primitive tubules and glomerula, whereas, E-MAP-115 mRNA and protein are absent from mature podocytes which have lost their initial apico-basal polarity [4].


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