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INSIG1 is short for insulin-induced gene 1; it is located on chromosome 7 (7q36). This human gene encodes for a 277 AA long transmembrane protein with probably 6 transmembrane domains. It is localized in the ER and seems to be expressed in all tissues, especially in liver.
Additional recommended knowledge
Both functions require the binding of INSIG1 protein via the same site.
There are two other proteins whose sterol-binding sites show a great similarity to the ones of SCAP and HMG-CoA-reductase and who might thus be regulated by INSIG1 as well:
INSIG1 is regulated by insulin and highly expressed in liver.
Sequence (277 AA)
MPRLHDHFWS CSCAHSARRR GPPRASTAGL PPKVGEMINV SVSGPSLLAA HGAPDADPAP RGRSAAMSGP EPGSPYPNTW HHRLLQRSLV LFSVGVVLAL VLNLLQIQRN VTLFPEEVIA TIFSSAWWVP PCCGTAAAVV GLLYPCIDSH LGEPHKFKRE WASVMRCIAV FVGINHASAK LDFANNVQLS LTLAALSLGL WWTFDRSRSG LGLGITIAFL ATLITQFLVY NGVYQYTSPD FLYIRSWLPC IFFSGGVTVG NIGRQLAMGV PEKPHSD
CL-6, INSIG-1, Insulin-induced gene 1 protein, MGC1405 (source: iHOP)
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Insig1". A list of authors is available in Wikipedia.|