_EC 3.1.6.- Sulfuric ester hydrolases. 42 PDB entries  
EC 3.-.-.- Hydrolases. [52,127 PDB entries]
EC 3.1.-.- Acting on ester bonds. [12,902 PDB entries]
EC 3.1.6.- Sulfuric ester hydrolases. [42 PDB entries]
EC 3.1.6.1 arylsulfatase (type I). [9 PDB entries]
EC 3.1.6.2 steryl-sulfatase. [2 PDB entries]
EC 3.1.6.3 glycosulfatase. [-]
EC 3.1.6.4 N-acetylgalactosamine-6-sulfatase. [2 PDB entries]
EC 3.1.6.5 Deleted entry. [-]
EC 3.1.6.6 choline-sulfatase. [5 PDB entries]
EC 3.1.6.7 cellulose-polysulfatase. [-]
EC 3.1.6.8 cerebroside-sulfatase. [8 PDB entries]
EC 3.1.6.9 chondro-4-sulfatase. [-]
EC 3.1.6.10 chondro-6-sulfatase. [-]
EC 3.1.6.11 disulfoglucosamine-6-sulfatase. [-]
EC 3.1.6.12 N-acetylgalactosamine-4-sulfatase. [2 PDB entries]
EC 3.1.6.13 iduronate-2-sulfatase. [2 PDB entries]
EC 3.1.6.14 N-acetylglucosamine-6-sulfatase. [-]
EC 3.1.6.15 N-sulfoglucosamine-3-sulfatase. [-]
EC 3.1.6.16 monomethyl-sulfatase. [-]
EC 3.1.6.17 D-lactate-2-sulfatase. [-]
EC 3.1.6.18 glucuronate-2-sulfatase. [-]
EC 3.1.6.19 (R)-specific secondary-alkylsulfatase (type III). [3 PDB entries]
EC 3.1.6.20 S-sulfosulfanyl-L-cysteine sulfohydrolase. [-]
EC 3.1.6.21 linear primary-alkylsulfatase. [9 PDB entries]
EC 3.1.6.22 branched primary-alkylsulfatase. [-]

[-] signifies that there are no PDB entries for the given enzyme subclass