Defective SLC33A1 does not transport Ac-CoA from cytosol to Golgi lumen

Stable Identifier
Reaction [transition]
Homo sapiens
Locations in the PathwayBrowser
SVG |   | PPTX  | SBGN
Click the image above or here to open this reaction in the Pathway Browser
The layout of this reaction may differ from that in the pathway view due to the constraints in pathway layout

The human gene SLC33A1 encodes acetyl-CoA transporter AT1. SLC33A1 transports cytosolic acetyl-CoA (Ac-CoA) to the Golgi apparatus lumen, where it serves as the substrate for acetyltransferases that O-acetylates sialyl residues of gangliosides and glycoproteins. Defects in SLC33A1 are the cause of spastic paraplegia autosomal dominant type 42 (SPG42; MIM:612539), a neurodegenerative disorder characterised by a variable speed of (but progressive) weakness and spasticity of the lower limbs. A mutation causing SPG42 is S113R, rendering it non-functional (Lin et al. 2008). Defects in SLC33A1 can also cause congenital cataracts, hearing loss, and neurodegeneration (CCHLND; MIM:614482), an autosomal recessive disorder characterised by congenital cataracts, severe psychomotor retardation, and hearing loss, together with decreased serum ceruloplasmin and copper. Mutations in SLC33A1 that can cause CCHLND include A110P and Y366* (Huppke et al. 2012).

Literature References
PubMed ID Title Journal Year
22243965 Mutations in SLC33A1 cause a lethal autosomal-recessive disorder with congenital cataracts, hearing loss, and low serum copper and ceruloplasmin

Huppke, P, Brendel, C, Kalscheuer, V, Korenke, GC, Marquardt, I, Freisinger, P, Christodoulou, J, Hillebrand, M, Pitelet, G, Wilson, C, Gruber-Sedlmayr, U, Ullmann, R, Haas, S, Elpeleg, O, Nürnberg, G, Nürnberg, P, Dad, S, Møller, LB, Kaler, SG, Gärtner, J

Am. J. Hum. Genet. 2012
19061983 A missense mutation in SLC33A1, which encodes the acetyl-CoA transporter, causes autosomal-dominant spastic paraplegia (SPG42)

Lin, P, Li, J, Li, J, Liu, Q, Mao, F, Qiu, R, Hu, H, Song, Y, Yang, Y, Gao, G, Yan, C, Yang, W, Shao, C, Gong, Y

Am J Hum Genet 2008
Participant Of
Catalyst Activity
Catalyst Activity
acetyl-CoA transmembrane transporter activity of SLC33A1 mutants [Golgi membrane]
Physical Entity
Normal reaction
Name Identifier Synonyms
cataract 83
neurodegenerative disease 1289 degenerative disease, Neurodegenerative disease
sensorineural hearing loss 10003 Perceptive hearing loss, Perceptive deafness [diagnos], Perceptive hearing loss or deafness, high-frequency hearing loss, central hearing loss, sensorineural hearing loss, Sensorineural Deafness, High frequency deafness, Sensory hearing loss, High Frequency Hearing Loss
hereditary spastic paraplegia 2476 Hereditary spastic paraplegia, Hereditary spastic paraplegia, Hereditary spastic paraplegia (disorder), Hereditary spastic paraplegia, familial spastic paraplegia, HSMN V
Cite Us!