Annotations: 2Q6C

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	Substrate-binding domain of HMG-CoA reductase	8037275	3001471	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	NAD-binding domain of HMG-CoA reductase	8035520	3001200	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Substrate-binding domain of HMG-CoA reductase	8037275	3001471	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Substrate-binding domain of HMG-CoA reductase	8037275	3001471	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	NAD-binding domain of HMG-CoA reductase	8035520	3001200	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Substrate-binding domain of HMG-CoA reductase	8037275	3001471	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	NAD-binding domain of HMG-CoA reductase	8035520	3001200	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Substrate-binding domain of HMG-CoA reductase	8037275	3001471	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Substrate-binding domain of HMG-CoA reductase	8037275	3001471	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Substrate-binding domain of HMG-CoA reductase	8037275	3001471	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Substrate-binding domain of HMG-CoA reductase	8037275	3001471	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	NAD-binding domain of HMG-CoA reductase	8035520	3001200	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C	HMG-CoA_red_2nd	e2q6cC1	A: a+b two layers	X: Alpha-beta plaits	H: HMG-CoA reductase	T: NAD-binding domain of HMG-CoA reductase	F: HMG-CoA_red_2nd	ECOD (1.6)
C	HMG-CoA_red_1st	e2q6cC2	A: a+b two layers	X: Alpha-beta plaits	H: HMG-CoA reductase	T: Substrate-binding domain of HMG-CoA reductase	F: HMG-CoA_red_1st	ECOD (1.6)
A	HMG-CoA_red_2nd	e2q6cA2	A: a+b two layers	X: Alpha-beta plaits	H: HMG-CoA reductase	T: NAD-binding domain of HMG-CoA reductase	F: HMG-CoA_red_2nd	ECOD (1.6)
A	HMG-CoA_red_1st	e2q6cA1	A: a+b two layers	X: Alpha-beta plaits	H: HMG-CoA reductase	T: Substrate-binding domain of HMG-CoA reductase	F: HMG-CoA_red_1st	ECOD (1.6)
B	HMG-CoA_red_2nd	e2q6cB1	A: a+b two layers	X: Alpha-beta plaits	H: HMG-CoA reductase	T: NAD-binding domain of HMG-CoA reductase	F: HMG-CoA_red_2nd	ECOD (1.6)
B	HMG-CoA_red_1st	e2q6cB2	A: a+b two layers	X: Alpha-beta plaits	H: HMG-CoA reductase	T: Substrate-binding domain of HMG-CoA reductase	F: HMG-CoA_red_1st	ECOD (1.6)
D	HMG-CoA_red_2nd	e2q6cD1	A: a+b two layers	X: Alpha-beta plaits	H: HMG-CoA reductase	T: NAD-binding domain of HMG-CoA reductase	F: HMG-CoA_red_2nd	ECOD (1.6)
D	HMG-CoA_red_1st	e2q6cD2	A: a+b two layers	X: Alpha-beta plaits	H: HMG-CoA reductase	T: Substrate-binding domain of HMG-CoA reductase	F: HMG-CoA_red_1st	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C	1.10.3270.10	Mainly Alpha	Orthogonal Bundle	HMGR, N-terminal domain	HMGR, N-terminal domain	CATH (4.3.0)
C	3.90.770.10	Alpha Beta	Alpha-Beta Complex	3-hydroxy-3-methylglutaryl-coenzyme A Reductase	Chain A, domain 2	CATH (4.3.0)
C	3.30.70.420	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain	CATH (4.3.0)
A	1.10.3270.10	Mainly Alpha	Orthogonal Bundle	HMGR, N-terminal domain	HMGR, N-terminal domain	CATH (4.3.0)
A	3.90.770.10	Alpha Beta	Alpha-Beta Complex	3-hydroxy-3-methylglutaryl-coenzyme A Reductase	Chain A, domain 2	CATH (4.3.0)
A	3.30.70.420	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain	CATH (4.3.0)
B	1.10.3270.10	Mainly Alpha	Orthogonal Bundle	HMGR, N-terminal domain	HMGR, N-terminal domain	CATH (4.3.0)
B	3.90.770.10	Alpha Beta	Alpha-Beta Complex	3-hydroxy-3-methylglutaryl-coenzyme A Reductase	Chain A, domain 2	CATH (4.3.0)
B	3.30.70.420	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain	CATH (4.3.0)
D	1.10.3270.10	Mainly Alpha	Orthogonal Bundle	HMGR, N-terminal domain	HMGR, N-terminal domain	CATH (4.3.0)
D	3.90.770.10	Alpha Beta	Alpha-Beta Complex	3-hydroxy-3-methylglutaryl-coenzyme A Reductase	Chain A, domain 2	CATH (4.3.0)
D	3.30.70.420	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits	Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF00368	Hydroxymethylglutaryl-coenzyme A reductase (HMG-CoA_red)	Hydroxymethylglutaryl-coenzyme A reductase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	3-hydroxy-3-methylglutaryl-coenzyme A reductase	binding nucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding heterocyclic compound binding NADPH binding NADP binding small molecule binding GTPase regulator activity enzyme regulator activity binding nucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding heterocyclic compound binding NADPH binding NADP binding small molecule binding GTPase regulator activity enzyme regulator activity nucleoside-triphosphatase regulator activity molecular function regulator activity coenzyme A binding adenyl ribonucleotide binding purine ribonucleotide binding carbohydrate derivative binding ribonucleotide binding oxidoreductase activity oxidoreductase activity, acting on the CH-OH group of donors, NAD or NADP as acceptor oxidoreductase activity, acting on CH-OH group of donors hydroxymethylglutaryl-CoA reductase (NADPH) activity catalytic activity	negative regulation of protein transport protein localization regulation of localization establishment of protein localization cellular localization nitrogen compound transport regulation of cellular process regulation of protein localization transport negative regulation of biological process negative regulation of transport protein localization to extracellular region localization negative regulation of secretion regulation of secretion by cell negative regulation of protein transport protein localization regulation of localization establishment of protein localization cellular localization nitrogen compound transport regulation of cellular process regulation of protein localization transport negative regulation of biological process negative regulation of transport protein localization to extracellular region localization negative regulation of secretion regulation of secretion by cell secretion by cell cellular macromolecule localization negative regulation of cellular process negative regulation of secretion by cell negative regulation of protein localization regulation of biological process regulation of transport secretion biological regulation regulation of establishment of protein localization establishment of protein localization to extracellular region negative regulation of establishment of protein localization export from cell regulation of protein transport protein secretion establishment of localization regulation of secretion regulation of protein secretion negative regulation of protein secretion protein transport regulation of cellular localization macromolecule localization cellular process isoprenoid biosynthetic process cellular biosynthetic process cellular metabolic process lipid biosynthetic process primary metabolic process biosynthetic process cellular lipid metabolic process metabolic process lipid metabolic process isoprenoid metabolic process response to light stimulus multicellular organismal process system process learning learning or memory nervous system process response to stimulus visual learning visual behavior cognition associative learning behavior response to radiation response to abiotic stimulus secondary alcohol biosynthetic process small molecule biosynthetic process cholesterol biosynthetic process organic hydroxy compound metabolic process sterol metabolic process steroid metabolic process cholesterol metabolic process alcohol metabolic process secondary alcohol metabolic process sterol biosynthetic process organic hydroxy compound biosynthetic process alcohol biosynthetic process small molecule metabolic process steroid biosynthetic process cellular response to stimulus regulation of signaling signaling regulation of signal transduction regulation of MAPK cascade intracellular signal transduction cell communication regulation of intracellular signal transduction regulation of response to stimulus intracellular signaling cassette MAPK cascade regulation of cell communication ERK1 and ERK2 cascade signal transduction regulation of ERK1 and ERK2 cascade ribose phosphate metabolic process nucleoside bisphosphate metabolic process purine nucleoside bisphosphate metabolic process ribonucleoside bisphosphate metabolic process carbohydrate derivative metabolic process nucleobase-containing compound metabolic process purine nucleotide metabolic process ribonucleotide metabolic process nucleobase-containing small molecule metabolic process phosphate-containing compound metabolic process phosphorus metabolic process coenzyme A metabolic process nucleoside phosphate metabolic process organonitrogen compound metabolic process nucleotide metabolic process purine-containing compound metabolic process organophosphate metabolic process purine ribonucleotide metabolic process catabolic process macromolecule catabolic process negative regulation of protein catabolic process regulation of primary metabolic process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process organonitrogen compound catabolic process negative regulation of catabolic process regulation of protein metabolic process negative regulation of metabolic process protein catabolic process regulation of macromolecule metabolic process regulation of catabolic process macromolecule metabolic process regulation of metabolic process regulation of protein catabolic process negative regulation of amyloid-beta clearance regulation of multicellular organismal process amyloid-beta clearance regulation of amyloid-beta clearance negative regulation of multicellular organismal process positive regulation of cell communication modulation of chemical synaptic transmission positive regulation of biological process long-term synaptic potentiation synaptic signaling regulation of biological quality positive regulation of cellular process regulation of synaptic plasticity trans-synaptic signaling cell-cell signaling positive regulation of synaptic transmission chemical synaptic transmission regulation of trans-synaptic signaling anterograde trans-synaptic signaling positive regulation of signaling	membrane-bounded organelle intracellular anatomical structure organelle subcompartment membrane cellular anatomical entity intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane membrane-bounded organelle intracellular anatomical structure organelle subcompartment membrane cellular anatomical entity intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum membrane peroxisome microbody membrane bounding membrane of organelle peroxisomal membrane microbody

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR004816	Hydroxymethylglutaryl-CoA reductase, metazoan	Family
A, B, C, D	IPR000731	Sterol-sensing domain	Domain
A, B, C, D	IPR002202	Hydroxymethylglutaryl-CoA reductase, class I/II	Family
A, B, C, D	IPR009023	Hydroxymethylglutaryl-CoA reductase, class I/II, NAD/NADP-binding domain superfamily	Homologous Superfamily
A, B, C, D	IPR004554	Hydroxymethylglutaryl-CoA reductase, eukaryotic/archaeal type	Family
A, B, C, D	IPR023282	Hydroxymethylglutaryl-CoA reductase, N-terminal	Homologous Superfamily
A, B, C, D	IPR009029	Hydroxymethylglutaryl-CoA reductase, class I/II, substrate-binding domain superfamily	Homologous Superfamily
A, B, C, D	IPR023074	Hydroxymethylglutaryl-CoA reductase, class I/II, catalytic domain superfamily	Homologous Superfamily
A, B, C, D	IPR023076	Hydroxymethylglutaryl-CoA reductase, class I/II, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	Pharos: P04035	Hypercholesterolemia myopathy chronic kidney disease autoimmune disease hepatocellular carcinoma Q fever hypoalphalipoproteinemia malignant pancreatic neoplasm osteosarcoma atherosclerosis pancreatic intraductal papillary-mucinous carcinoma Pick disease Prinzmetal angina sinusitis familial hyperlipidemia Hypercholesterolemia myopathy chronic kidney disease autoimmune disease hepatocellular carcinoma Q fever hypoalphalipoproteinemia malignant pancreatic neoplasm osteosarcoma atherosclerosis pancreatic intraductal papillary-mucinous carcinoma Pick disease Prinzmetal angina sinusitis familial hyperlipidemia ulcerative colitis gastric carcinoma hyperlipoproteinemia type 3 inherited lipid metabolism disorder muscle tissue disease ovarian cancer pancreatic intraductal papillary-mucinous neoplasm ductal breast carcinoma in situ psoriasis gallstones hypertriglyceridemia interstitial lung disease malignant mesothelioma muscular disease arteriosclerosis disorder pancreatic ductal adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia coronary artery disease exocrine pancreatic carcinoma tuberculosis gastric cancer

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 R01GM133198.