Center for Bioinformatics
Oxidoreductases | Transferases | Hydrolases | Lyases | Isomerases | Ligases

Basic Information

Enzyme Number

Official Name

stearoyl-CoA 9-desaturase

Name from literature

Stearoyl-CoA desaturase

Pathway from literature

monounsaturated fatty acid synthesis,oleic acid synthesis,

Pathway from KEGG

Cellular Processes; Endocrine System; PPAR signaling pathway; map03320

Lipid Metabolism; Biosynthesis of unsaturated fatty acids; map01040


Rat (10116)

Genome localization

1q54[83792 ], 1q54[246074 ],


An iron protein. The rat liver enzyme is an enzyme system involving cytochrome b5 and EC, cytochrome-b5 reductase. The ferricytochrome b5 produced is reduced by NADH and cytochrome-b5 reductase (EC

Rate-limiting Description

"A key enzyme involved in this process is the membrane-bound stearoyl-CoA desaturase (SCD) which is the rate-limiting enzyme in the cellular synthesis of monounsaturated fatty acids from saturated fatty acids." (10484602)

"Stearoyl-CoA desaturase (SCD) is a key rate-limiting enzyme in the synthesis of unsaturated fatty acids by insertion of a cis-double bond in the Delta9 position of fatty acid substrates." (10581155)

Regulatory Information

Upstream transcription factor


Regulatory type


transcriptional factor;PPARalpha(25747)

"PPARalpha is required to mediate the response of Scd-1 and Fas gene expression to insulin and that this is normally achieved directly by activation of LXRalpha." (18079124)

Gene ontology

Gene ontology

GO:0016021 (C) integral to membrane [Q6P7B9, P07308 ];
GO:0004768 (F) stearoyl-CoA 9-desaturase activity [Q6P7B9, P07308 ];
GO:0055114 (P) oxidation reduction [Q6P7B9, P07308 ];
GO:0005506 (F) iron ion binding [Q6P7B9, P07308 ];
GO:0006633 (P) fatty acid biosynthetic process [Q6P7B9, P07308 ];
GO:0005789 (C) endoplasmic reticulum membrane [Q6P7B9, P07308 ];

Subcellular localization


endoplasmic reticulum [Q6P7B9, P07308 ];



P07308; Q6P7B9

Entrez Gene

246074; 83792

  Copyright 2009, Center for Bioinformatics 
  Last Modified: 2009-03-24  
  Design by Zhao Min