Catalysis of the reaction: 1D-myo-inositol-2-(L-cysteinylamido)-2-deoxy-alpha-D-glucopyranoside + acetyl-CoA = mycothiol + coA + H+. Mycothiol is also known as AcCys-GlcN-Ins and 1-D-myo-inosityl-2-L-cysteinylamido-2-deoxy-alpha-D-glucopyranoside as Cys-GlcN-Ins or desacetylmycothiol.
Catalysis of the reaction: 1-(2-amino-2-deoxy-alpha-D-glucopyranoside)-1D-myo-inositol + L-cysteine + ATP = 1-D-myo-inosityl-2-L-cysteinylamido-2-deoxy-alpha-D-glucopyranoside + AMP + diphosphate + 2 H+. 1-(2-amino-2-deoxy-alpha-D-glucopyranoside)-1D-myo-inositol is also known as glucosaminyl-inositol or GlcN-Ins, and 1-D-myo-inosityl-2-L-cysteinylamido-2-deoxy-alpha-D-glucopyranoside as desacetylmycothiol or Cys-GlcN-Ins.
A phospholipid phosphatase complex that catalyses the hydrolysis of the second messenger PtdIns (3,4,5)P3. Will also dephosphorylate PtdIns(3,4)P2, PtdIns3P, and Ins(1,3,4,5)P4. Dimerization is critical for its lipid phosphatase function.