4YMK

Crystal Structure of Stearoyl-Coenzyme A Desaturase 1

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	FA_desaturase	e4ymkA1	A: alpha complex topology	X: Integral membrane Acyl-CoA desaturase (From Topology)	H: Integral membrane Acyl-CoA desaturase (From Topology)	T: Integral membrane Acyl-CoA desaturase	F: FA_desaturase	ECOD (1.6)
B [auth D]	FA_desaturase	e4ymkD1	A: alpha complex topology	X: Integral membrane Acyl-CoA desaturase (From Topology)	H: Integral membrane Acyl-CoA desaturase (From Topology)	T: Integral membrane Acyl-CoA desaturase	F: FA_desaturase	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B [auth D]	PF00487	Fatty acid desaturase (FA_desaturase)	Fatty acid desaturase	Fatty acid desaturases are enzymes that catalyse the insertion of a double bond at the delta position of fatty acids. There seem to be two distinct families of fatty acid desaturases which do not seem to be evolutionary related: Family 1 composed of ...	Fatty acid desaturases are enzymes that catalyse the insertion of a double bond at the delta position of fatty acids. There seem to be two distinct families of fatty acid desaturases which do not seem to be evolutionary related: Family 1 composed of Stearoyl-CoA desaturases (SCD) [1,2] and Family 2 composed of Bacterial fatty acid desaturases, Plant stearoyl-acyl-carrier-protein desaturase [3] and Cyanobacterial DesA [4]. Members of this entry are ER integral membrane proteins that share the same mushroom-shaped fold consisting of four transmembrane helices (TM1-TM4) which anchor them to the membrane, capped by a cytosolic domain containing a unique 9-10 histidine- coordinating di metal (di-iron) catalytic centre [5,6]. The structure of mouse stearoyl-CoA desaturase (SDC) revealed that TM2 and TM4 are longer than TM1 and TM3 and protrude into the cytosolic domain, providing three of the nine histidine residues that coordinate the two metal ions, while the other histidine residues are provided by the soluble domain in this enzyme [5].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B [auth D]	Acyl-CoA desaturase 1	acyl-CoA desaturase activity oxidoreductase activity oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen oxidoreductase activity, acting on paired donors, with oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water catalytic activity stearoyl-CoA 9-desaturase activity cation binding transition metal ion binding iron ion binding ion binding binding metal ion binding small molecule binding palmitoyl-CoA 9-desaturase activity	biosynthetic process lipid biosynthetic process primary metabolic process metabolic process cellular process lipid metabolic process chemical homeostasis homeostatic process lipid homeostasis fatty acid metabolic process unsaturated fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process biosynthetic process lipid biosynthetic process primary metabolic process metabolic process cellular process lipid metabolic process chemical homeostasis homeostatic process lipid homeostasis fatty acid metabolic process unsaturated fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process oxoacid metabolic process carboxylic acid metabolic process organic acid biosynthetic process organic acid metabolic process fatty acid biosynthetic process carboxylic acid biosynthetic process unsaturated fatty acid biosynthetic process small molecule metabolic process monocarboxylic acid metabolic process developmental process skin development gland development animal organ development anatomical structure development tarsal gland development sebaceous gland development monounsaturated fatty acid biosynthetic process monounsaturated fatty acid metabolic process sterol homeostasis cholesterol homeostasis multicellular organismal process regulation of biological process regulation of cellular process biological regulation positive regulation of biological process adaptive thermogenesis positive regulation of metabolic process multicellular organismal-level homeostasis regulation of cold-induced thermogenesis cold-induced thermogenesis temperature homeostasis positive regulation of cold-induced thermogenesis positive regulation of multicellular organismal process regulation of multicellular organismal process regulation of metabolic process positive regulation of cellular process biological process involved in interspecies interaction between organisms response to stimulus response to other organism response to bacterium response to external stimulus response to external biotic stimulus response to biotic stimulus fat cell differentiation cellular developmental process brown fat cell differentiation cell differentiation neutral lipid metabolic process triglyceride metabolic process glycerolipid metabolic process acylglycerol metabolic process response to lipid response to fatty acid response to chemical response to oxygen-containing compound response to nutrient levels response to nutrient defense response defense response to Gram-positive bacterium defense response to bacterium defense response to other organism response to stress white fat cell differentiation	membrane-bounded organelle intracellular anatomical structure organelle subcompartment membrane intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment intracellular organelle cellular anatomical structure organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane membrane-bounded organelle intracellular anatomical structure organelle subcompartment membrane intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment intracellular organelle cellular anatomical structure organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth D]	IPR001522	Fatty acid desaturase type 1, conserved site	Conserved Site
A, B [auth D]	IPR015876	Acyl-CoA desaturase	Family
A, B [auth D]	IPR005804	Fatty acid desaturase domain	Domain

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B [auth D]	OPM	Transmembrane	Alpha-helical polytopic	Fatty acid desaturase/hydroxylase	Fatty acid desaturase

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B [auth D]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B [auth D]	MemProtMD	Annotated as membrane protein by MemProtMD

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.