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3.1.6.12: N-acetylgalactosamine-4-sulfatase

This is an abbreviated version!
For detailed information about N-acetylgalactosamine-4-sulfatase, go to the full flat file.

Word Map on EC 3.1.6.12

Reaction

D-GalNAc-4-sulfate
+
H2O
=
sulfate
+
D-GalNAc

Synonyms

4-sulfatase, 4-sulphatase, acetylgalactosamine 4-sulfatase, ARSB, arylsulfatase B, ASB, chondroitinase, chondroitinsulfatase, chondrosulfatase, G4S, gastric chondrosulfohydrolase, N-acetylgalactosamine 4-sulfatase, N-acetylgalactosamine 4-sulfate sulfohydrolase, N-acetylgalactosamine-4-sulfatase, N-acetylgalactosamine-4-sulphatase, sulfatase, acetylgalactosamine 4-

ECTree

     3 Hydrolases
         3.1 Acting on ester bonds
             3.1.6 Sulfuric-ester hydrolases
                3.1.6.12 N-acetylgalactosamine-4-sulfatase

Posttranslational Modification

Posttranslational Modification on EC 3.1.6.12 - N-acetylgalactosamine-4-sulfatase

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POSTTRANSLATIONAL MODIFICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
glycoprotein
phosphoprotein
-
compared to degree of mannose-phosphorylation of the wild-type enzyme the mutant enzyme K457R has 33%, mutant enzyme K457S has 50%, mutant enzyme K457G has 31% mutant enzyme K433A has 95%, mutant enzyme K367A has 106% and mutant enzyme K393A has 123% of mannose-phosphorylation
proteolytic modification
-
33% of the intracellular Y210C mutant enzyme remains as a precursor form, for at least 8 h post labeling and is not processed to the mature lysosomal form. A significant amount of the mutant enzyme escapes the endoplasmic reticulum and is either secreted from the expression cells or undergoes delayed intracellular traffic. 67% of the intracellular Y210C mutant enzyme is processed to the mature form by a proteolytic processing step known to occur in lysosomes
additional information
conversion of an active-site cysteine into a formylglycine