======= SI =======
== Gene Information ==
* **Official Symbol**: SI
* **Official Name**: sucrase-isomaltase
* **Aliases and Previous Symbols**: N/A
* **Entrez ID**: [[https://www.ncbi.nlm.nih.gov/gene/?term=6476|6476]]
* **UniProt**: [[https://www.uniprot.org/uniprot/P14410|P14410]]
* **Interactions**: [[https://thebiogrid.org/search.php?search=SI&organism=9606|BioGRID]]
* **PubMed articles**: [[https://www.ncbi.nlm.nih.gov/pubmed/?term=gene%20SI|Open PubMed]]
* **OMIM**: [[https://omim.org/entry/609845|Open OMIM]]
== Function Summary ==
* **Entrez Summary**: This gene encodes a sucrase-isomaltase enzyme that is expressed in the intestinal brush border. The encoded protein is synthesized as a precursor protein that is cleaved by pancreatic proteases into two enzymatic subunits sucrase and isomaltase. These two subunits heterodimerize to form the sucrose-isomaltase complex. This complex is essential for the digestion of dietary carbohydrates including starch, sucrose and isomaltose. Mutations in this gene are the cause of congenital sucrase-isomaltase deficiency.[provided by RefSeq, Apr 2010].
* **UniProt Summary**: Plays an important role in the final stage of carbohydrate digestion. Isomaltase activity is specific for both alpha-1,4- and alpha-1,6-oligosaccharides. {ECO:0000269|PubMed:20356844}.
|Trefoil|
|Glyco hydro 31|
|oligo-1,6-glucosidase activity|
|sucrose alpha-glucosidase activity|
|polysaccharide digestion|
|brush border|
|digestion|
|carbohydrate binding|
|apical plasma membrane|
|carbohydrate metabolic process|
|Golgi apparatus|
\\
=== CRISPR Data ===
^Screen^Score^
|[[:results:exp217|Mdivi-1 15μM R05 exp217]]|1.71|
|[[:results:exp300|VE-822 0.04μM R06 exp300]]|1.97|
No correlation found to any other genes in chemogenomics.
Global Fraction of Cell Lines Where Essential: 0/739
^Tissue^Fraction Of Cell Lines Where Essential^
|1290807.0|0/1|
|909776.0|0/1|
|bile duct|0/28|
|blood|0/28|
|bone|0/26|
|breast|0/33|
|central nervous system|0/56|
|cervix|0/4|
|colorectal|0/17|
|esophagus|0/13|
|fibroblast|0/1|
|gastric|0/16|
|kidney|0/21|
|liver|0/20|
|lung|0/75|
|lymphocyte|0/16|
|ovary|0/26|
|pancreas|0/24|
|peripheral nervous system|0/16|
|plasma cell|0/15|
|prostate|0/1|
|skin|0/24|
|soft tissue|0/9|
|thyroid|0/2|
|upper aerodigestive|0/22|
|urinary tract|0/29|
|uterus|0/5|
== Essentiality in NALM6 ==
* **Essentiality Rank**: 16474
* **Expression level (log2 read counts)**: -7.68
{{:chemogenomics:nalm6 dist.png?nolink |}}