HEXA

(Hexosaminidase A (alpha polypeptide))

 

  • Alias                                 (According to NCBI)

 
  • N-acetyl-beta-glucosaminidase
  • TSD
  • beta-N-acetylhexosaminidase
  • hexosaminidase A (alpha polypeptide)
  • Beta-hexosaminidase alpha chain precursor (EC 3.2.1.52) (N-acetyl- beta-glucosaminidase)
    (Beta-N-acetylhexosaminidase) (Hexosaminidase A).
  • Hexosaminidase A is the alpha subunit of the lysosomal enzyme beta-hexosaminidase that, together with the cofactor GM2 activator protein, catalyzes the degradation of the ganglioside GM2, and other molecules containing terminal N-acetyl hexosamines. Beta-hexosaminidase is composed of two subunits, alpha and beta, which are encoded by separate genes. Both beta-hexosaminidase alpha and beta subunits are members of family 20 of glycosyl hydrolases. Mutations in the alpha or beta subunit genes lead to an accumulation of GM2 ganglioside in neurons and neurodegenerative disorders termed the GM2 gangliosidoses. Alpha subunit gene mutations lead to Tay-Sachs disease (GM2-gangliosidosis type I).
  • Location: 15q23-q24
  • Orientation: minus strand
  • Size:  32561 bp
  • 14  exons
  • DNA sequence (Human): NC_000015

  • CGH (15q23-24):  Losses (%) -1.7   Gain (%) 8.4  

  • Mutations and SNPs (According to HGMD and SNP)
  • m-RNA                       (According to NCBI and CGAP)

 

  • mRNA sequence (Human): NM_000520

  • Size: 2255 bp

  • cDNA libraries: HEXA

 
  • Size: 529 amino acids; 60688 Da
  • Catalytic activity:

  • Subcellular location: Lysosomal.

  • Protein domains

 

 

  • Pathways and interactions (According to BioCarta, DIP)

  • Pathway:

  • Protein interactions:
  • Clinical                            (According to OMIM, PubMed)