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EC 3.5.1.103 Details
EC number
3.5.1.103
Accepted name
N-acetyl-1-D-myo-inositol-2-amino-2-deoxy-α-D-glucopyranoside deacetylase
Reaction
1-O-(2-acetamido-2-deoxy-α-D-glucopyranosyl)-1D-myo-inositol + H2O = 1-O-(2-amino-2-deoxy-α-D-glucopyranosyl)-1D-myo-inositol + acetate
Other name(s)
MshB
Systematic name
1-(2-acetamido-2-deoxy-α-D-glucopyranosyl)-1D-myo-inositol acetylhydrolase
Comment
This enzyme is considered the key enzyme and rate limiting step in the mycothiol biosynthesis pathway [1]. In addition to acetylase activity, the enzyme possesses weak activity of EC 3.5.1.115, mycothiol S-conjugate amidase, and shares sequence similarity with that enzyme [2]. The enzyme requires a divalent transition metal ion for activity, believed to be Zn2+ [3].
History
created 2010
EC Tree
1.1.1.68 created 1965, deleted 1978 [transferred to EC 1.1.99.15, deleted 1980]
1.1.1.70 created 1965, deleted 1978
1.1.1.74 created 1972, deleted 1976
1.1.1.89 created 1972, deleted 1976
1.1.1.109 created 1972, deleted 1976
1.1.1.139 created 1972, deleted 1978
1.1.1.155 created 1976, deleted 2004
1.1.1.171 created 1978, deleted 1984
1.1.1.180 created 1983, deleted 1984
1.1.1.182 created 1983, deleted 1990
1.1.1.204 created 1972 as EC 1.2.1.37, transferred 1984 to EC 1.1.1.204, modified 1989, deleted 2004
1.1.1.242 created 1992, deleted 2001
1.1.1.249 provisional version created 1999, deleted 1999 (reinstated 2001 as EC 2.5.1.46)
1.1.1.253 created 1999, deleted 2003