L-cysteine:1D-myo-inositol 2-amino-2-deoxy-alpha-D-glucopyranoside ligase (EC 6.3.1.13 MshC MshC ligase Cys:GlcN-Ins ligase mycothiol ligase) is an enzyme with system name L-cysteine:1-O-(2-amino-2-deoxy-alpha-D-glucopyranosyl)-1D-myo-inositol ligase (AMP-forming).