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6y6s

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Mouse Galactocerebrosidase complexed with galacto-noeurostegine GNS at pH 6.8

Structural highlights

6y6s is a 1 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 2.1Å
Ligands:	, , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

GALC_MOUSE Defects in Galc are the cause of the 'twitcher' phenotype; an autosomal recessive leukodystrophy similar to the human disease (Krabbe disease). This deficiency results in the insufficient catabolism of several galactolipids that are important in the production of normal myelin.

Function

GALC_MOUSE Hydrolyzes the galactose ester bonds of galactosylceramide, galactosylsphingosine, lactosylceramide, and monogalactosyldiglyceride. Enzyme with very low activity responsible for the lysosomal catabolism of galactosylceramide, a major lipid in myelin, kidney and epithelial cells of small intestine and colon.^[1]

Publication Abstract from PubMed

Competitive inhibitors of galactocerebrosidase (GALC) could be candidates for pharmacological chaperone therapy of patients with Krabbe disease. The known and selective nortropane-type iminosugar galacto-noeurostegine has been found to competitively inhibit GALC with K (i) = 7 muM at pH 4.6, which is 330-fold more potent than the analogous deoxynoeurostegine. It was shown through X-ray protein crystallography that galacto-noeurostegine binds to the active site of GALC in its bicyclic form.

The Bicyclic Form of galacto-Noeurostegine Is a Potent Inhibitor of beta-Galactocerebrosidase.,Viuff A, Salamone S, McLoughlin J, Deane JE, Jensen HH ACS Med Chem Lett. 2020 Dec 18;12(1):56-59. doi: 10.1021/acsmedchemlett.0c00377. , eCollection 2021 Jan 14. PMID:33488964^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Sakai N, Inui K, Tatsumi N, Fukushima H, Nishigaki T, Taniike M, Nishimoto J, Tsukamoto H, Yanagihara I, Ozono K, Okada S. Molecular cloning and expression of cDNA for murine galactocerebrosidase and mutation analysis of the twitcher mouse, a model of Krabbe's disease. J Neurochem. 1996 Mar;66(3):1118-24. PMID:8769874
↑ Viuff A, Salamone S, McLoughlin J, Deane JE, Jensen HH. The Bicyclic Form of galacto-Noeurostegine Is a Potent Inhibitor of β-Galactocerebrosidase. ACS Med Chem Lett. 2020 Dec 18;12(1):56-59. PMID:33488964 doi:10.1021/acsmedchemlett.0c00377