Annotations: 4MHX

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Phosphonate monoester hydrolases-like	8045401	4004457	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Alkaline phosphatase-like	8090530	3001353	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Arylsulfatase C-terminal domain-like	8090531	3002305	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Alkaline phosphatase-like	8090530	3001353	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Arylsulfatase C-terminal domain-like	8090531	3002305	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Sulfatase_1	e4mhxA1	A: a/b three-layered sandwiches	X: Alkaline phosphatase-like (From Topology)	H: Alkaline phosphatase-like (From Topology)	T: Alkaline phosphatase-like	F: Sulfatase_1	ECOD (1.6)
B	Sulfatase_1	e4mhxB1	A: a/b three-layered sandwiches	X: Alkaline phosphatase-like (From Topology)	H: Alkaline phosphatase-like (From Topology)	T: Alkaline phosphatase-like	F: Sulfatase_1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.720.10	Alpha Beta	3-Layer(aba) Sandwich	Alkaline Phosphatase, subunit A	Alkaline Phosphatase, subunit A	CATH (4.3.0)
B	3.40.720.10	Alpha Beta	3-Layer(aba) Sandwich	Alkaline Phosphatase, subunit A	Alkaline Phosphatase, subunit A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF16347	N-sulphoglucosamine sulphohydrolase, C-terminal (SGSH_C)	N-sulphoglucosamine sulphohydrolase, C-terminal	-	Family
A, B	PF00884	Sulfatase (Sulfatase)	Sulfatase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	N-sulphoglucosamine sulphohydrolase	hydrolase activity, acting on ester bonds hydrolase activity catalytic activity sulfuric ester hydrolase activity N-sulfoglucosamine sulfohydrolase activity hydrolase activity, acting on acid sulfur-nitrogen bonds cation binding ion binding binding metal ion binding small molecule binding	organonitrogen compound catabolic process carbohydrate derivative catabolic process catabolic process organonitrogen compound metabolic process glycosaminoglycan metabolic process carbohydrate derivative metabolic process aminoglycan catabolic process macromolecule catabolic process glycosaminoglycan catabolic process organic substance metabolic process aminoglycan metabolic process metabolic process macromolecule metabolic process organic substance catabolic process organonitrogen compound catabolic process carbohydrate derivative catabolic process catabolic process organonitrogen compound metabolic process glycosaminoglycan metabolic process carbohydrate derivative metabolic process aminoglycan catabolic process macromolecule catabolic process glycosaminoglycan catabolic process organic substance metabolic process aminoglycan metabolic process metabolic process macromolecule metabolic process organic substance catabolic process multicellular organismal process determination of adult lifespan cellular catabolic process sulfur compound metabolic process protein metabolic process glycoprotein catabolic process cellular metabolic process primary metabolic process protein catabolic process glycoprotein metabolic process sulfur compound catabolic process heparan sulfate proteoglycan catabolic process cellular process proteoglycan catabolic process proteoglycan metabolic process behavior motor behavior	membrane-bounded organelle intracellular anatomical structure lytic vacuole membrane-enclosed lumen vacuolar lumen vacuole cellular anatomical entity intracellular membrane-bounded organelle lysosomal lumen intracellular organelle lumen intracellular organelle organelle lumen organelle cytoplasm membrane-bounded organelle intracellular anatomical structure lytic vacuole membrane-enclosed lumen vacuolar lumen vacuole cellular anatomical entity intracellular membrane-bounded organelle lysosomal lumen intracellular organelle lumen intracellular organelle organelle lumen organelle cytoplasm lysosome extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular space vesicle extracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR032506	N-sulphoglucosamine sulphohydrolase, C-terminal	Domain
A, B	IPR024607	Sulfatase, conserved site	Conserved Site
A, B	IPR000917	Sulfatase, N-terminal	Domain
A, B	IPR017850	Alkaline-phosphatase-like, core domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: P51688	mucopolysaccharidosis type 3 Sanfilippo syndrome type A Sanfilippo syndrome type C Sanfilippo syndrome type D mucopolysaccharidosis Sanfilippo syndrome type B atypical teratoid rhabdoid tumor inborn errors of metabolism malignant mesothelioma psoriasis Hallermann-Streiff syndrome intellectual disability medulloblastoma ovarian cancer Hyperammonemia mucopolysaccharidosis type 3 Sanfilippo syndrome type A Sanfilippo syndrome type C Sanfilippo syndrome type D mucopolysaccharidosis Sanfilippo syndrome type B atypical teratoid rhabdoid tumor inborn errors of metabolism malignant mesothelioma psoriasis Hallermann-Streiff syndrome intellectual disability medulloblastoma ovarian cancer Hyperammonemia lysosomal storage disease pilocytic astrocytoma subependymal giant cell astrocytoma

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	N-sulfoglucosamine sulfohydrolase M-CSA #951	N-sulfoglucosamine sulfohydrolase (SGSH; also known as sulfamidase, sulfamate sulfohydrolase and heparan N-sulfatase; EC 3.10.1.1) belongs to the sulfatase family and catalyses the cleavage of N-linked sulfate groups from the glycosaminoglycans heparan sulfate and heparin. The active site is characterised by the amino-acid sequence motif C(X)PSR that is highly conserved among most sulfatases from all species. The leading cysteine is post-translationally converted to a formylglycine (FGly) residue, which is crucial for the catalytic process. In humans mucopolysaccharidosis type IIIA (Sanfilippo A syndrome), a fatal childhood-onset neurodegenerative disease with mild facial, visceral and skeletal abnormalities, is caused by an inherited deficiency of this enzyme.	Defined by 9 residues: ASP:A-31ASP:A-32ARG:A-74LYS:A-123HIS:A-125HIS:A-181ASP:A-273ASN:A-274ARG:A-282 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 3.10.1.1 (PDB Primary Data) Search M-CSA Motif + EC 3.10.1.1

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.