<table><tr><td colspan='2'>[[1e33]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E33 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1E33 FirstGlance]. <br>
[https://www.uniprot.org/uniprot/ARSA_HUMAN ARSA_HUMAN] Defects in ARSA are a cause of leukodystrophy metachromatic (MLD) [MIM:[https://omim.org/entry/250100 250100]. MLD is a disease due to a lysosomal storage defect. It is characterized by intralysosomal storage of cerebroside-3-sulfate in neural and non-neural tissues, with a diffuse loss of myelin in the central nervous system. Progressive demyelination causes a variety of neurological symptoms, including gait disturbances, ataxias, optical atrophy, dementia, seizures, and spastic tetraparesis. Three forms of the disease can be distinguished according to the age at onset: late-infantile, juvenile and adult.<ref>PMID:1673291</ref> <ref>PMID:1678251</ref> <ref>PMID:1670590</ref> <ref>PMID:1353340</ref> <ref>PMID:8101038</ref> <ref>PMID:8101083</ref> <ref>PMID:8095918</ref> <ref>PMID:7902317</ref> <ref>PMID:7906588</ref> <ref>PMID:8104633</ref> <ref>PMID:7909527</ref> <ref>PMID:7825603</ref> <ref>PMID:7860068</ref> <ref>PMID:7581401</ref> <ref>PMID:8891236</ref> <ref>PMID:9272717</ref> <ref>PMID:9090526</ref> <ref>PMID:9490297</ref> <ref>PMID:9600244</ref> <ref>PMID:9452102</ref> <ref>PMID:9819708</ref> <ref>PMID:10220151</ref> <ref>PMID:10477432</ref> <ref>PMID:10533072</ref> <ref>PMID:10381328</ref> <ref>PMID:10751093</ref> <ref>PMID:11061266</ref> <ref>PMID:11020646</ref> <ref>PMID:11456299</ref> <ref>PMID:11941485</ref> <ref>PMID:12503099</ref> <ref>PMID:12788103</ref> <ref>PMID:14517960</ref> <ref>PMID:14680985</ref> <ref>PMID:15326627</ref> <ref>PMID:15026521</ref> <ref>PMID:15710861</ref> <ref>PMID:18693274</ref> <ref>PMID:19606494</ref> <ref>PMID:20339381</ref> <ref>PMID:21265945</ref> Arylsulfatase A activity is defective in multiple sulfatase deficiency (MSD) [MIM:[https://omim.org/entry/272200 272200]. A clinically and biochemically heterogeneous disorder caused by the simultaneous impairment of all sulfatases, due to defective post-translational modification and activation. It combines features of individual sulfatase deficiencies such as metachromatic leukodystrophy, mucopolysaccharidosis, chondrodysplasia punctata, hydrocephalus, ichthyosis, neurologic deterioration and developmental delay. Note=Arylsulfatase A activity is impaired in multiple sulfatase deficiency due to mutations in SUMF1. SUMF1 mutations result in defective post-translational modification of ARSA at residue Cys-69 that is not converted to 3-oxoalanine.<ref>PMID:7628016</ref> <ref>PMID:15146462</ref>
<text>to colour the structure by Evolutionary Conservation</text>
</jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1e33 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
In one of the most common mutations causing metachromatic leukodystrophy, the P426L-allele of arylsulfatase A (ASA), the deficiency of ASA results from its instability in lysosomes. Inhibition of lysosomal cysteine proteinases protects the P426L-ASA and restores the sulfatide catabolism in fibroblasts of the patients. P426L-ASA, but not wild type ASA, was cleaved by purified cathepsin L at threonine 421 yielding 54- and 9-kDa fragments. X-ray crystallography at 2.5-A resolution showed that cleavage is not due to a difference in the protein fold that would expose the peptide bond following threonine 421 to proteases. Octamerization, which depends on protonation of Glu-424, was impaired for P426L-ASA. The mutation lowers the pH for the octamer/dimer equilibrium by 0.6 pH units from pH 5.8 to 5.2. A second oligomerization mutant (ASA-A464R) was generated that failed to octamerize even at pH 4.8. A464R-ASA was degraded in lysosomes to catalytically active 54-kDa intermediate. In cathepsin L-deficient fibroblasts, degradation of P426L-ASA and A464R-ASA to the 54-kDa fragment was reduced, while further degradation was blocked. This indicates that defective oligomerization of ASA allows degradation of ASA to a catalytically active 54-kDa intermediate by lysosomal cysteine proteinases, including cathepsin L. Further degradation of the 54-kDa intermediate critically depends on cathepsin L and is modified by the structure of the 9-kDa cleavage product.
==Overview==
Defective oligomerization of arylsulfatase a as a cause of its instability in lysosomes and metachromatic leukodystrophy.,von Bulow R, Schmidt B, Dierks T, Schwabauer N, Schilling K, Weber E, Uson I, von Figura K J Biol Chem. 2002 Mar 15;277(11):9455-61. Epub 2002 Jan 2. PMID:11777924<ref>PMID:11777924</ref>
In one of the most common mutations causing metachromatic leukodystrophy, the P426L-allele of arylsulfatase A (ASA), the deficiency of ASA results from its instability in lysosomes. Inhibition of lysosomal cysteine proteinases protects the P426L-ASA and restores the sulfatide catabolism in fibroblasts of the patients. P426L-ASA, but not wild type ASA, was cleaved by purified cathepsin L at threonine 421 yielding 54- and 9-kDa fragments. X-ray crystallography at 2.5-A resolution showed that cleavage is not due to a difference in the protein fold that would expose the peptide bond following threonine 421 to proteases. Octamerization, which depends on protonation of Glu-424, was impaired for P426L-ASA. The mutation lowers the pH for the octamer/dimer equilibrium by 0.6 pH units from pH 5.8 to 5.2. A second oligomerization mutant (ASA-A464R) was generated that failed to octamerize even at pH 4.8. A464R-ASA was degraded in lysosomes to catalytically active 54-kDa intermediate. In cathepsin L-deficient fibroblasts, degradation of P426L-ASA and A464R-ASA to the 54-kDa fragment was reduced, while further degradation was blocked. This indicates that defective oligomerization of ASA allows degradation of ASA to a catalytically active 54-kDa intermediate by lysosomal cysteine proteinases, including cathepsin L. Further degradation of the 54-kDa intermediate critically depends on cathepsin L and is modified by the structure of the 9-kDa cleavage product.
==About this Structure==
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
1E33 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1E33 OCA].
Defective oligomerization of arylsulfatase a as a cause of its instability in lysosomes and metachromatic leukodystrophy., von Bulow R, Schmidt B, Dierks T, Schwabauer N, Schilling K, Weber E, Uson I, von Figura K, J Biol Chem. 2002 Mar 15;277(11):9455-61. Epub 2002 Jan 2. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11777924 11777924]
*[[Sulfatase 3D structures|Sulfatase 3D structures]]
[[Category: Cerebroside-sulfatase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Buelow, R Von.]]
[[Category: Dierks T]]
[[Category: Dierks, T.]]
[[Category: Schmidt B]]
[[Category: Figura, K Von.]]
[[Category: Uson I]]
[[Category: Schmidt, B.]]
[[Category: Von Buelow R]]
[[Category: Uson, I.]]
[[Category: Von Figura K]]
[[Category: Cerebroside-3-sulfate hydrolysis]]
[[Category: Formylglycine]]
[[Category: Hydrolase]]
[[Category: Lysosomal enzyme]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 14:35:56 2008''
Latest revision as of 23:55, 20 November 2024
Crystal structure of an Arylsulfatase A mutant P426L
1e33 is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
ARSA_HUMAN Defects in ARSA are a cause of leukodystrophy metachromatic (MLD) [MIM:250100. MLD is a disease due to a lysosomal storage defect. It is characterized by intralysosomal storage of cerebroside-3-sulfate in neural and non-neural tissues, with a diffuse loss of myelin in the central nervous system. Progressive demyelination causes a variety of neurological symptoms, including gait disturbances, ataxias, optical atrophy, dementia, seizures, and spastic tetraparesis. Three forms of the disease can be distinguished according to the age at onset: late-infantile, juvenile and adult.[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] Arylsulfatase A activity is defective in multiple sulfatase deficiency (MSD) [MIM:272200. A clinically and biochemically heterogeneous disorder caused by the simultaneous impairment of all sulfatases, due to defective post-translational modification and activation. It combines features of individual sulfatase deficiencies such as metachromatic leukodystrophy, mucopolysaccharidosis, chondrodysplasia punctata, hydrocephalus, ichthyosis, neurologic deterioration and developmental delay. Note=Arylsulfatase A activity is impaired in multiple sulfatase deficiency due to mutations in SUMF1. SUMF1 mutations result in defective post-translational modification of ARSA at residue Cys-69 that is not converted to 3-oxoalanine.[42][43]
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
In one of the most common mutations causing metachromatic leukodystrophy, the P426L-allele of arylsulfatase A (ASA), the deficiency of ASA results from its instability in lysosomes. Inhibition of lysosomal cysteine proteinases protects the P426L-ASA and restores the sulfatide catabolism in fibroblasts of the patients. P426L-ASA, but not wild type ASA, was cleaved by purified cathepsin L at threonine 421 yielding 54- and 9-kDa fragments. X-ray crystallography at 2.5-A resolution showed that cleavage is not due to a difference in the protein fold that would expose the peptide bond following threonine 421 to proteases. Octamerization, which depends on protonation of Glu-424, was impaired for P426L-ASA. The mutation lowers the pH for the octamer/dimer equilibrium by 0.6 pH units from pH 5.8 to 5.2. A second oligomerization mutant (ASA-A464R) was generated that failed to octamerize even at pH 4.8. A464R-ASA was degraded in lysosomes to catalytically active 54-kDa intermediate. In cathepsin L-deficient fibroblasts, degradation of P426L-ASA and A464R-ASA to the 54-kDa fragment was reduced, while further degradation was blocked. This indicates that defective oligomerization of ASA allows degradation of ASA to a catalytically active 54-kDa intermediate by lysosomal cysteine proteinases, including cathepsin L. Further degradation of the 54-kDa intermediate critically depends on cathepsin L and is modified by the structure of the 9-kDa cleavage product.
Defective oligomerization of arylsulfatase a as a cause of its instability in lysosomes and metachromatic leukodystrophy.,von Bulow R, Schmidt B, Dierks T, Schwabauer N, Schilling K, Weber E, Uson I, von Figura K J Biol Chem. 2002 Mar 15;277(11):9455-61. Epub 2002 Jan 2. PMID:11777924[44]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
↑Kondo R, Wakamatsu N, Yoshino H, Fukuhara N, Miyatake T, Tsuji S. Identification of a mutation in the arylsulfatase A gene of a patient with adult-type metachromatic leukodystrophy. Am J Hum Genet. 1991 May;48(5):971-8. PMID:1673291
↑Gieselmann V, Fluharty AL, Tonnesen T, Von Figura K. Mutations in the arylsulfatase A pseudodeficiency allele causing metachromatic leukodystrophy. Am J Hum Genet. 1991 Aug;49(2):407-13. PMID:1678251
↑Polten A, Fluharty AL, Fluharty CB, Kappler J, von Figura K, Gieselmann V. Molecular basis of different forms of metachromatic leukodystrophy. N Engl J Med. 1991 Jan 3;324(1):18-22. PMID:1670590
↑Kappler J, von Figura K, Gieselmann V. Late-onset metachromatic leukodystrophy: molecular pathology in two siblings. Ann Neurol. 1992 Mar;31(3):256-61. PMID:1353340 doi:https://dx.doi.org/10.1002/ana.410310305
↑Kreysing J, Bohne W, Bosenberg C, Marchesini S, Turpin JC, Baumann N, von Figura K, Gieselmann V. High residual arylsulfatase A (ARSA) activity in a patient with late-infantile metachromatic leukodystrophy. Am J Hum Genet. 1993 Aug;53(2):339-46. PMID:8101038
↑Hasegawa Y, Kawame H, Eto Y. Mutations in the arylsulfatase A gene of Japanese patients with metachromatic leukodystrophy. DNA Cell Biol. 1993 Jul-Aug;12(6):493-8. PMID:8101083
↑Barth ML, Fensom A, Harris A. Prevalence of common mutations in the arylsulphatase A gene in metachromatic leukodystrophy patients diagnosed in Britain. Hum Genet. 1993 Mar;91(1):73-7. PMID:8095918
↑Honke K, Kobayashi T, Fujii T, Gasa S, Xu M, Takamaru Y, Kondo R, Tsuji S, Makita A. An adult-type metachromatic leukodystrophy caused by substitution of serine for glycine-122 in arylsulfatase A. Hum Genet. 1993 Nov;92(5):451-6. PMID:7902317
↑Barth ML, Fensom A, Harris A. Missense mutations in the arylsulphatase A genes of metachromatic leukodystrophy patients. Hum Mol Genet. 1993 Dec;2(12):2117-21. PMID:7906588
↑Harvey JS, Nelson PV, Carey WF, Robertson EF, Morris CP. An arylsulfatase A (ARSA) missense mutation (T274M) causing late-infantile metachromatic leukodystrophy. Hum Mutat. 1993;2(4):261-7. PMID:8104633 doi:https://dx.doi.org/10.1002/humu.1380020405
↑Hasegawa Y, Kawame H, Ida H, Ohashi T, Eto Y. Single exon mutation in arylsulfatase A gene has two effects: loss of enzyme activity and aberrant splicing. Hum Genet. 1994 Apr;93(4):415-20. PMID:7909527
↑Heinisch U, Zlotogora J, Kafert S, Gieselmann V. Multiple mutations are responsible for the high frequency of metachromatic leukodystrophy in a small geographic area. Am J Hum Genet. 1995 Jan;56(1):51-7. PMID:7825603
↑Kafert S, Heinisch U, Zlotogora J, Gieselmann V. A missense mutation P136L in the arylsulfatase A gene causes instability and loss of activity of the mutant enzyme. Hum Genet. 1995 Feb;95(2):201-4. PMID:7860068
↑Barth ML, Fensom A, Harris A. Identification of seven novel mutations associated with metachromatic leukodystrophy. Hum Mutat. 1995;6(2):170-6. PMID:7581401 doi:https://dx.doi.org/10.1002/humu.1380060210
↑Tsuda T, Hasegawa Y, Eto Y. Two novel mutations in a Japanese patient with the late-infantile form of metachromatic leukodystrophy. Brain Dev. 1996 Sep-Oct;18(5):400-3. PMID:8891236
↑Regis S, Filocamo M, Stroppiano M, Corsolini F, Gatti R. A T > C transition causing a Leu > Pro substitution in a conserved region of the arylsulfatase A gene in a late infantile metachromatic leukodystrophy patient. Clin Genet. 1997 Jul;52(1):65-7. PMID:9272717
↑Regis S, Filocamo M, Stroppiano M, Corsolini F, Caroli F, Gatti R. A 9-bp deletion (2320del9) on the background of the arylsulfatase A pseudodeficiency allele in a metachromatic leukodystrophy patient and in a patient with nonprogressive neurological symptoms. Hum Genet. 1998 Jan;102(1):50-3. PMID:9490297
↑Gomez-Lira M, Perusi C, Mottes M, Pignatti PF, Manfredi M, Rizzuto N, Salviati A. Molecular genetic characterization of two metachromatic leukodystrophy patients who carry the T799G mutation and show different phenotypes; description of a novel null-type mutation. Hum Genet. 1998 Apr;102(4):459-63. PMID:9600244
↑Coulter-Mackie MB, Gagnier L. Two novel mutations in the arylsulfatase A gene associated with juvenile (R390Q) and adult onset (H397Y) metachromatic leukodystrophy. Hum Mutat. 1998;Suppl 1:S254-6. PMID:9452102
↑Kurosawa K, Ida H, Eto Y. Prevalence of arylsulphatase A mutations in 11 Japanese patients with metachromatic leukodystrophy: identification of two novel mutations. J Inherit Metab Dis. 1998 Oct;21(7):781-2. PMID:9819708
↑Qu Y, Shapira E, Desnick RJ. Metachromatic leukodystrophy: subtype genotype/phenotype correlations and identification of novel missense mutations (P148L and P191T) causing the juvenile-onset disease. Mol Genet Metab. 1999 Jul;67(3):206-12. PMID:10381328 doi:10.1006/mgme.1999.2865
↑Hermann S, Schestag F, Polten A, Kafert S, Penzien J, Zlotogora J, Baumann N, Gieselmann V. Characterization of four arylsulfatase A missense mutations G86D, Y201C, D255H, and E312D causing metachromatic leukodystrophy. Am J Med Genet. 2000 Mar 6;91(1):68-73. PMID:10751093
↑Felice KJ, Gomez Lira M, Natowicz M, Grunnet ML, Tsongalis GJ, Sima AA, Kaplan RF. Adult-onset MLD: a gene mutation with isolated polyneuropathy. Neurology. 2000 Oct 10;55(7):1036-9. PMID:11061266
↑Arbour LT, Silver K, Hechtman P, Treacy EP, Coulter-Mackie MB. Variable onset of metachromatic leukodystrophy in a Vietnamese family. Pediatr Neurol. 2000 Aug;23(2):173-6. PMID:11020646
↑Comabella M, Waye JS, Raguer N, Eng B, Dominguez C, Navarro C, Borras C, Krivit W, Montalban X. Late-onset metachromatic leukodystrophy clinically presenting as isolated peripheral neuropathy: compound heterozygosity for the IVS2+1G-->A mutation and a newly identified missense mutation (Thr408Ile) in a Spanish family. Ann Neurol. 2001 Jul;50(1):108-12. PMID:11456299
↑Regis S, Corsolini F, Stroppiano M, Cusano R, Filocamo M. Contribution of arylsulfatase A mutations located on the same allele to enzyme activity reduction and metachromatic leukodystrophy severity. Hum Genet. 2002 Apr;110(4):351-5. Epub 2002 Mar 8. PMID:11941485 doi:10.1007/s00439-002-0701-y
↑Marcao A, Simonis H, Schestag F, Sa Miranda MC, Gieselmann V. Biochemical characterization of two (C300F, P425T) arylsulfatase a missense mutations. Am J Med Genet A. 2003 Jan 30;116A(3):238-42. PMID:12503099 doi:10.1002/ajmg.a.10822
↑Marcao A, Azevedo JE, Gieselmann V, Sa Miranda MC. Oligomerization capacity of two arylsulfatase A mutants: C300F and P425T. Biochem Biophys Res Commun. 2003 Jun 20;306(1):293-7. PMID:12788103
↑Eng B, Nakamura LN, O'Reilly N, Schokman N, Nowaczyk MM, Krivit W, Waye JS. Identification of nine novel arylsulfatase a (ARSA) gene mutations in patients with metachromatic leukodystrophy (MLD). Hum Mutat. 2003 Nov;22(5):418-9. PMID:14517960 doi:10.1002/humu.9190
↑Olkhovich NV, Takamura N, Pichkur NA, Gorovenko NG, Aoyagi K, Yamashita S. Novel mutations in arylsulfatase A gene in three Ukrainian families with metachromatic leukodystrophy. Mol Genet Metab. 2003 Nov;80(3):360-3. PMID:14680985 doi:10.1016/j.ymgme.2003.08.004
↑Berna L, Gieselmann V, Poupetova H, Hrebicek M, Elleder M, Ledvinova J. Novel mutations associated with metachromatic leukodystrophy: phenotype and expression studies in nine Czech and Slovak patients. Am J Med Genet A. 2004 Sep 1;129A(3):277-81. PMID:15326627 doi:10.1002/ajmg.a.30118
↑Gallo S, Randi D, Bertelli M, Salviati A, Pandolfo M. Late onset MLD with normal nerve conduction associated with two novel missense mutations in the ASA gene. J Neurol Neurosurg Psychiatry. 2004 Apr;75(4):655-7. PMID:15026521
↑Marcao AM, Wiest R, Schindler K, Wiesmann U, Weis J, Schroth G, Miranda MC, Sturzenegger M, Gieselmann V. Adult onset metachromatic leukodystrophy without electroclinical peripheral nervous system involvement: a new mutation in the ARSA gene. Arch Neurol. 2005 Feb;62(2):309-13. PMID:15710861 doi:10.1001/archneur.62.2.309
↑Grossi S, Regis S, Rosano C, Corsolini F, Uziel G, Sessa M, Di Rocco M, Parenti G, Deodato F, Leuzzi V, Biancheri R, Filocamo M. Molecular analysis of ARSA and PSAP genes in twenty-one Italian patients with metachromatic leukodystrophy: identification and functional characterization of 11 novel ARSA alleles. Hum Mutat. 2008 Nov;29(11):E220-30. doi: 10.1002/humu.20851. PMID:18693274 doi:10.1002/humu.20851
↑Cesani M, Capotondo A, Plati T, Sergi LS, Fumagalli F, Roncarolo MG, Naldini L, Comi G, Sessa M, Biffi A. Characterization of new arylsulfatase A gene mutations reinforces genotype-phenotype correlation in metachromatic leukodystrophy. Hum Mutat. 2009 Oct;30(10):E936-45. doi: 10.1002/humu.21093. PMID:19606494 doi:10.1002/humu.21093
↑Lugowska A, Ploski R, Wlodarski P, Tylki-Szymanska A. Molecular bases of metachromatic leukodystrophy in Polish patients. J Hum Genet. 2010 Jun;55(6):394-6. doi: 10.1038/jhg.2010.25. Epub 2010 Mar 26. PMID:20339381 doi:10.1038/jhg.2010.25
↑Hayashi T, Nakamura M, Ichiba M, Matsuda M, Kato M, Shiokawa N, Shimo H, Tomiyasu A, Mori S, Tomiyasu Y, Ishizuka T, Inamori Y, Okamoto Y, Umehara F, Arimura K, Nakabeppu Y, Sano A. Adult-type metachromatic leukodystrophy with compound heterozygous ARSA mutations: a case report and phenotypic comparison with a previously reported case. Psychiatry Clin Neurosci. 2011 Feb;65(1):105-8. doi:, 10.1111/j.1440-1819.2010.02169.x. PMID:21265945 doi:10.1111/j.1440-1819.2010.02169.x
↑Schmidt B, Selmer T, Ingendoh A, von Figura K. A novel amino acid modification in sulfatases that is defective in multiple sulfatase deficiency. Cell. 1995 Jul 28;82(2):271-8. PMID:7628016
↑Cosma MP, Pepe S, Parenti G, Settembre C, Annunziata I, Wade-Martins R, Di Domenico C, Di Natale P, Mankad A, Cox B, Uziel G, Mancini GM, Zammarchi E, Donati MA, Kleijer WJ, Filocamo M, Carrozzo R, Carella M, Ballabio A. Molecular and functional analysis of SUMF1 mutations in multiple sulfatase deficiency. Hum Mutat. 2004 Jun;23(6):576-81. PMID:15146462 doi:10.1002/humu.20040
↑von Bulow R, Schmidt B, Dierks T, Schwabauer N, Schilling K, Weber E, Uson I, von Figura K. Defective oligomerization of arylsulfatase a as a cause of its instability in lysosomes and metachromatic leukodystrophy. J Biol Chem. 2002 Mar 15;277(11):9455-61. Epub 2002 Jan 2. PMID:11777924 doi:10.1074/jbc.M111993200
