Glucosidase I is the first enzyme in the N-linked oligosaccharide processing pathway. GCS1 cleaves the distal alpha-1,2-linked glucose residue from the Glc(3)-Man(9)-GlcNAc(2) oligosaccharide precursor. GCS1 is located in the lumen of the endoplasmic reticulum.[6]
GCS1 may also refer to "generative cell specific 1", also called HAP2 (hapless2), a gene of lower eukaryotes which is thought to be responsible for gametes fusion .[7]
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^Kalz-Fuller B, Heidrich-Kaul C, Nothen M, Bause E, Schwanitz G (Sep 1996). "Localization of the human glucosidase I gene to chromosome 2p12-p13 by fluorescence in situ hybridization and PCR analysis of somatic cell hybrids". Genomics. 34 (3): 442–3. doi:10.1006/geno.1996.0313. PMID8786151.
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