acetyl-CoA + D-glucosamine 6-phosphate = CoA + H(+) + N-acetyl-D-glucosamine 6-phosphate Nucleotide-sugar biosynthesis; UDP-N-acetyl-alpha-D-glucosamine biosynthesis; N-acetyl-alpha-D-glucosamine 1-phosphate from alpha-D-glucosamine 6-phosphate (route I): step 1/2. Homodimer. Ubiquitous. Shows a strong differential expression pattern in adult hematopoietic precursor cells. Widely expressed at early stages of embryonic development but is confined to bones, skin and the hematopoietic system at later developmental stages. Belongs to the acetyltransferase family. GNA1 subfamily.