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
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↑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
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↑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
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↑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
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↑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
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↑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
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↑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
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↑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
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↑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
