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Protein

Acyl-CoA desaturase 2

Gene

Scd2

Organism
Mus musculus (Mouse)
Status
Reviewed-Annotation score: -Experimental evidence at protein leveli

Functioni

Stearyl-CoA desaturase that utilizes O2 and electrons from reduced cytochrome b5 to introduce the first double bond into saturated fatty acyl-CoA substrates (PubMed:16443825). Catalyzes the insertion of a cis double bond at the delta-9 position into fatty acyl-CoA substrates including palmitoyl-CoA and stearoyl-CoA (PubMed:16443825). Gives rise to a mixture of 16:1 and 18:1 unsaturated fatty acids (PubMed:16443825). Contributes to the biosynthesis of membrane phospholipids, cholesterol esters and triglycerides, especially during embryonic development and in neonates (PubMed:16118274). Important for normal permeability barrier function of the skin in neonates (PubMed:16118274).2 Publications

Catalytic activityi

Stearoyl-CoA + 2 ferrocytochrome b5 + O2 + 2 H+ = oleoyl-CoA + 2 ferricytochrome b5 + 2 H2O.1 Publication1 Publication

Cofactori

Fe2+By similarityNote: Expected to bind 2 Fe2+ ions per subunit.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei74SubstrateBy similarity1
Metal bindingi119Iron 1By similarity1
Metal bindingi124Iron 1By similarity1
Binding sitei147SubstrateBy similarity1
Binding sitei154SubstrateBy similarity1
Binding sitei155SubstrateBy similarity1
Metal bindingi156Iron 1By similarity1
Metal bindingi159Iron 2By similarity1
Metal bindingi160Iron 1By similarity1
Binding sitei187SubstrateBy similarity1
Binding sitei188SubstrateBy similarity1
Binding sitei261SubstrateBy similarity1
Metal bindingi268Iron 2By similarity1
Metal bindingi297Iron 2By similarity1
Metal bindingi300Iron 1By similarity1
Metal bindingi301Iron 2By similarity1

GO - Molecular functioni

  • metal ion binding Source: UniProtKB-KW
  • palmitoyl-CoA 9-desaturase activity Source: MGI
  • stearoyl-CoA 9-desaturase activity Source: MGI

GO - Biological processi

  • monounsaturated fatty acid biosynthetic process Source: MGI

Keywordsi

Molecular functionOxidoreductase
Biological processFatty acid biosynthesis, Fatty acid metabolism, Lipid biosynthesis, Lipid metabolism
LigandIron, Metal-binding

Enzyme and pathway databases

BRENDAi1.14.19.1 3474
ReactomeiR-MMU-75105 Fatty acyl-CoA biosynthesis

Names & Taxonomyi

Protein namesi
Recommended name:
Acyl-CoA desaturase 2 (EC:1.14.19.11 Publication1 Publication)
Alternative name(s):
Delta(9)-desaturase 2
Short name:
Delta-9 desaturase 21 Publication
Fatty acid desaturase 2
Stearoyl-CoA desaturase 2
Gene namesi
Name:Scd2
OrganismiMus musculus (Mouse)
Taxonomic identifieri10090 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
Proteomesi
  • UP000000589 Componenti: Chromosome 19

Organism-specific databases

MGIiMGI:98240 Scd2

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Topological domaini1 – 71CytoplasmicBy similarityAdd BLAST71
Transmembranei72 – 92HelicalBy similarityAdd BLAST21
Topological domaini93 – 96LumenalBy similarity4
Transmembranei97 – 117HelicalBy similarityAdd BLAST21
Topological domaini118 – 216CytoplasmicBy similarityAdd BLAST99
Transmembranei217 – 236HelicalBy similarityAdd BLAST20
Topological domaini237 – 240LumenalBy similarity4
Transmembranei241 – 262HelicalBy similarityAdd BLAST22
Topological domaini263 – 358CytoplasmicBy similarityAdd BLAST96

Keywords - Cellular componenti

Endoplasmic reticulum, Membrane, Microsome

Pathology & Biotechi

Disruption phenotypei

Mutant mice are born at the expected Mendelian rate. Neonates are smaller than wild-type and present high mortality, ranging from 70 to 100%, depending on the genetic background. Neonates display a shiny skin, but after a few hours their skin appears dry and cracked. The permeability barrier function of their skin is impaired, leading to rapid weight loss due to dehydration. Their epidermis has decreased levels of cholesterol esters, triglycerides, acylceramide, and glucosylacylceramide containing unsaturated fatty acids. In mutant neonates, triglyceride levels in liver and blood plasma are reduced by half, due to strongly reduced levels of stearoyl-CoA desaturase activity in the liver and strongly reduced levels of triglyceride biosynthesis. In contrast, the levels of stearoyl-CoA desaturase activity are normal in adult mice deficient for Scd2. Adult mice display kinked tails.1 Publication

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001853981 – 358Acyl-CoA desaturase 2Add BLAST358

Proteomic databases

EPDiP13011
MaxQBiP13011
PaxDbiP13011
PeptideAtlasiP13011
PRIDEiP13011

PTM databases

iPTMnetiP13011
PhosphoSitePlusiP13011
SwissPalmiP13011

Expressioni

Tissue specificityi

Detected in brain and skin (PubMed:10545940, PubMed:11161812, PubMed:16118274). Highly expressed in brain, and detected at low levels in heart, stomach, lung and testis (PubMed:11161812, PubMed:12815040). Detected both in dermis and epidermis (PubMed:16118274).3 Publications

Developmental stagei

Highly expressed during embryonic development and during the first three weeks after birth. Expression is low in adults.1 Publication

Inductioni

Up-regulated by agonists that activate NR1H3 (PubMed:12815040). Slightly down-regulated by a high-carbohydrate diet enriched in unsaturated fatty acids (PubMed:12815040).1 Publication

Gene expression databases

BgeeiENSMUSG00000025203
CleanExiMM_SCD2
GenevisibleiP13011 MM

Interactioni

Protein-protein interaction databases

STRINGi10090.ENSMUSP00000026221

Structurei

3D structure databases

ProteinModelPortaliP13011
SMRiP13011
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Motifi119 – 124Histidine box-1Curated6
Motifi156 – 160Histidine box-2Curated5
Motifi297 – 301Histidine box-3Curated5

Domaini

The histidine box domains are involved in binding the catalytic metal ions.By similarity

Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiKOG1600 Eukaryota
COG1398 LUCA
GeneTreeiENSGT00530000063158
HOGENOMiHOG000270352
HOVERGENiHBG003367
InParanoidiP13011
KOiK00507
OMAiMAPNIIG
OrthoDBiEOG091G0B5S
TreeFamiTF313251

Family and domain databases

CDDicd03505 Delta9-FADS-like, 1 hit
InterProiView protein in InterPro
IPR015876 Acyl-CoA_DS
IPR005804 FA_desaturase_dom
IPR001522 FADS-1_CS
PANTHERiPTHR11351 PTHR11351, 1 hit
PfamiView protein in Pfam
PF00487 FA_desaturase, 1 hit
PRINTSiPR00075 FACDDSATRASE
PROSITEiView protein in PROSITE
PS00476 FATTY_ACID_DESATUR_1, 1 hit

Sequencei

Sequence statusi: Complete.

P13011-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MPAHILQEIS GAYSATTTIT APPSGGQQNG GEKFEKSSHH WGADVRPELK
60 70 80 90 100
DDLYDPTYQD DEGPPPKLEY VWRNIILMAL LHLGALYGIT LVPSCKLYTC
110 120 130 140 150
LFAYLYYVIS ALGITAGAHR LWSHRTYKAR LPLRLFLIIA NTMAFQNDVY
160 170 180 190 200
EWARDHRAHH KFSETHADPH NSRRGFFFSH VGWLLVRKHP AVKEKGGKLD
210 220 230 240 250
MSDLKAEKLV MFQRRYYKPG LLLMCFVLPT LVPWYCWGET FVNSLCVSTF
260 270 280 290 300
LRYAVVLNAT WLVNSAAHLY GYRPYDKNIS SRENILVSMG AVGEGFHNYH
310 320 330 340 350
HAFPYDYSAS EYRWHINFTT FFIDCMALLG LAYDRKRVSR AAVLARIKRT

GDGSCKSG
Length:358
Mass (Da):40,916
Last modified:July 27, 2011 - v2
Checksum:i3E04893F12E92A9A
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti220G → D in AAA40094 (PubMed:2570068).Curated1
Sequence conflicti295G → R in AAA40094 (PubMed:2570068).Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M26270 mRNA Translation: AAA40094.1
AK083922 mRNA Translation: BAC39066.1
AK147406 mRNA Translation: BAE27893.1
CH466534 Genomic DNA Translation: EDL41928.1
BC040384 mRNA Translation: AAH40384.1
CCDSiCCDS29848.1
PIRiA36507
RefSeqiNP_033154.2, NM_009128.2
UniGeneiMm.487021

Genome annotation databases

EnsembliENSMUST00000026221; ENSMUSP00000026221; ENSMUSG00000025203
GeneIDi20250
KEGGimmu:20250
UCSCiuc008hpp.2 mouse

Similar proteinsi

Entry informationi

Entry nameiACOD2_MOUSE
AccessioniPrimary (citable) accession number: P13011
Secondary accession number(s): Q8BH96
Entry historyiIntegrated into UniProtKB/Swiss-Prot: January 1, 1990
Last sequence update: July 27, 2011
Last modified: May 23, 2018
This is version 149 of the entry and version 2 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

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