3IOU

Huntingtin amino-terminal region with 17 Gln residues - crystal C94

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Type 2 solute binding protein-like	8058187	3000083	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Type 2 solute binding protein-like	8058187	3000083	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Type 2 solute binding protein-like	8058187	3000083	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)
A	SBP_bac_1_C	e3iouA2	A: a/b three-layered sandwiches	X: Periplasmic binding protein-like II (From Topology)	H: Periplasmic binding protein-like II (From Topology)	T: Periplasmic binding protein-like II	F: SBP_bac_1_C	ECOD (1.6)
A	SBP_bac_1_C,SBP_bac_1_N_2	e3iouA3	A: a/b three-layered sandwiches	X: Periplasmic binding protein-like II (From Topology)	H: Periplasmic binding protein-like II (From Topology)	T: Periplasmic binding protein-like II	F: SBP_bac_1_C,SBP_bac_1_N_2	ECOD (1.6)
B	SBP_bac_1_C	e3iouB1	A: a/b three-layered sandwiches	X: Periplasmic binding protein-like II (From Topology)	H: Periplasmic binding protein-like II (From Topology)	T: Periplasmic binding protein-like II	F: SBP_bac_1_C	ECOD (1.6)
B	SBP_bac_1_C,SBP_bac_1_N_2	e3iouB2	A: a/b three-layered sandwiches	X: Periplasmic binding protein-like II (From Topology)	H: Periplasmic binding protein-like II (From Topology)	T: Periplasmic binding protein-like II	F: SBP_bac_1_C,SBP_bac_1_N_2	ECOD (1.6)
C	SBP_bac_1_C	e3iouC2	A: a/b three-layered sandwiches	X: Periplasmic binding protein-like II (From Topology)	H: Periplasmic binding protein-like II (From Topology)	T: Periplasmic binding protein-like II	F: SBP_bac_1_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.190.10	Alpha Beta	3-Layer(aba) Sandwich	D-Maltodextrin-Binding Protein	domain 2	CATH (4.3.0)
B	3.40.190.10	Alpha Beta	3-Layer(aba) Sandwich	D-Maltodextrin-Binding Protein	domain 2	CATH (4.3.0)
C	3.40.190.10	Alpha Beta	3-Layer(aba) Sandwich	D-Maltodextrin-Binding Protein	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF01547	Bacterial extracellular solute-binding protein (SBP_bac_1)	Bacterial extracellular solute-binding protein	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	Maltose-binding periplasmic protein,Huntingtin	transporter activity carbohydrate transmembrane transporter activity transmembrane transporter activity oligosaccharide binding binding disaccharide binding carbohydrate binding maltose binding protein binding heat shock protein binding cytoskeletal protein binding dynactin binding dynein intermediate chain binding identical protein binding transporter activity carbohydrate transmembrane transporter activity transmembrane transporter activity oligosaccharide binding binding disaccharide binding carbohydrate binding maltose binding protein binding heat shock protein binding cytoskeletal protein binding dynactin binding dynein intermediate chain binding identical protein binding p53 binding profilin binding kinase binding enzyme binding transmembrane transporter binding beta-tubulin binding tubulin binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process cell chemotaxis chemotaxis response to external stimulus cellular response to chemical stimulus taxis response to chemical cell migration cell motility cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process cell chemotaxis chemotaxis response to external stimulus cellular response to chemical stimulus taxis response to chemical cell migration cell motility locomotion localization transport carbohydrate transport oligosaccharide transport disaccharide transport establishment of localization maltose transport polysaccharide localization dextrin transport macromolecule localization maltodextrin transmembrane transport polysaccharide transport response to disaccharide response to oxygen-containing compound detection of maltose stimulus detection of stimulus response to carbohydrate detection of chemical stimulus detection of disaccharide stimulus response to maltose detection of carbohydrate stimulus multicellular organismal process system process learning or memory learning nervous system process imitative learning auditory behavior vocal learning learned vocalization behavior or vocal learning response to mechanical stimulus cognition mechanosensory behavior behavior response to auditory stimulus observational learning response to abiotic stimulus protein destabilization regulation of protein stability biological regulation regulation of biological quality microtubule-based transport regulation of biological process regulation of signaling regulation of cellular process signaling regulation of signal transduction intracellular signal transduction cell communication regulation of CAMKK-AMPK signaling cascade calcium-mediated signaling regulation of intracellular signal transduction regulation of response to stimulus intracellular signaling cassette regulation of calcium-mediated signaling regulation of cell communication signal transduction CAMKK-AMPK signaling cascade apoptotic process cell death programmed cell death positive regulation of programmed cell death regulation of apoptotic process positive regulation of biological process regulation of programmed cell death positive regulation of apoptotic process positive regulation of cellular process regulation of calcium ion transmembrane transporter activity positive regulation of cell communication regulation of localization regulation of calcium ion transport positive regulation of cation transmembrane transport positive regulation of calcium ion transport positive regulation of signal transduction intracellular calcium ion homeostasis negative regulation of biological process regulation of inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity calcium ion transport positive regulation of monoatomic ion transport positive regulation of monoatomic ion transmembrane transport monoatomic cation homeostasis monoatomic cation transport intracellular monoatomic ion homeostasis regulation of release of sequestered calcium ion into cytosol regulation of monoatomic ion transport inorganic ion transmembrane transport regulation of cation channel activity positive regulation of cation channel activity inorganic cation transmembrane transport maintenance of location transmembrane transport regulation of molecular function release of sequestered calcium ion into cytosol regulation of transmembrane transport chemical homeostasis cellular localization inorganic ion homeostasis homeostatic process monoatomic ion transmembrane transport regulation of transmembrane transporter activity calcium ion homeostasis regulation of monoatomic ion transmembrane transport negative regulation of sequestering of calcium ion metal ion transport regulation of transporter activity maintenance of location in cell monoatomic cation transmembrane transport regulation of calcium ion transmembrane transport positive regulation of response to stimulus positive regulation of molecular function positive regulation of calcium ion transmembrane transporter activity intracellular monoatomic cation homeostasis positive regulation of calcium ion transmembrane transport positive regulation of transmembrane transport monoatomic ion homeostasis negative regulation of cellular process monoatomic ion transport intracellular chemical homeostasis positive regulation of release of sequestered calcium ion into cytosol regulation of metal ion transport regulation of sequestering of calcium ion regulation of monoatomic ion transmembrane transporter activity calcium ion transmembrane import into cytosol regulation of transport sequestering of calcium ion positive regulation of inositol 1,4,5-trisphosphate-sensitive calcium-release channel activity cellular homeostasis positive regulation of transport positive regulation of transporter activity positive regulation of ion transmembrane transporter activity regulation of monoatomic cation transmembrane transport calcium ion transmembrane transport positive regulation of signaling retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum Golgi vesicle transport vesicle-mediated transport establishment of organelle localization microtubule cytoskeleton organization spindle localization establishment or maintenance of cell polarity mitotic cell cycle cellular component organization establishment of mitotic spindle localization establishment of spindle localization establishment of spindle orientation organelle localization establishment of localization in cell cell cycle cellular component organization or biogenesis microtubule cytoskeleton organization involved in mitosis cell cycle process establishment of cell polarity organelle organization mitotic cell cycle process establishment of mitotic spindle orientation microtubule-based process cytoskeleton organization regulation of protein modification process regulation of catalytic activity regulation of protein phosphorylation regulation of transferase activity regulation of primary metabolic process regulation of phosphate metabolic process regulation of cAMP-dependent protein kinase activity phosphate-containing compound metabolic process protein metabolic process phosphorus metabolic process protein modification process protein phosphorylation phosphorylation cellular metabolic process regulation of protein metabolic process regulation of cellular metabolic process primary metabolic process regulation of protein kinase activity regulation of macromolecule metabolic process regulation of kinase activity regulation of protein serine/threonine kinase activity macromolecule modification regulation of phosphorylation regulation of phosphorus metabolic process metabolic process macromolecule metabolic process regulation of metabolic process negative regulation of signaling extrinsic apoptotic signaling pathway negative regulation of cell communication negative regulation of extrinsic apoptotic signaling pathway negative regulation of apoptotic signaling pathway cell surface receptor signaling pathway negative regulation of response to stimulus negative regulation of programmed cell death negative regulation of signal transduction regulation of extrinsic apoptotic signaling pathway apoptotic signaling pathway negative regulation of apoptotic process regulation of apoptotic signaling pathway vesicle cytoskeletal trafficking vesicle localization organelle transport along microtubule establishment of vesicle localization intracellular transport vesicle transport along microtubule transport along microtubule cytoskeleton-dependent intracellular transport microtubule-based movement catabolic process lipophagy macroautophagy autophagy positive regulation of cellular metabolic process regulation of autophagy cellular catabolic process positive regulation of metabolic process positive regulation of lipophagy regulation of lipophagy positive regulation of macroautophagy process utilizing autophagic mechanism positive regulation of autophagy regulation of catabolic process positive regulation of catabolic process regulation of macroautophagy regulation of cellular catabolic process positive regulation of cellular catabolic process positive regulation of aggrephagy aggrephagy regulation of aggrephagy positive regulation of organelle organization regulation of cellular component organization positive regulation of cellular component organization cell projection organization plasma membrane bounded cell projection assembly cellular component biogenesis cellular component assembly cilium assembly positive regulation of cell projection organization cilium organization plasma membrane bounded cell projection organization organelle assembly positive regulation of cellular component biogenesis regulation of cell projection organization regulation of cell projection assembly regulation of cellular component biogenesis regulation of organelle organization regulation of plasma membrane bounded cell projection assembly positive regulation of cilium assembly regulation of cilium assembly regulation of organelle assembly cell projection assembly regulation of plasma membrane bounded cell projection organization positive regulation of plasma membrane bounded cell projection assembly positive regulation of organelle assembly positive regulation of autophagy of mitochondrion mitophagy regulation of autophagy of mitochondrion positive regulation of mitophagy regulation of mitophagy autophagy of mitochondrion Golgi organization endomembrane system organization	ATPase dependent transmembrane transport complex protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex cellular anatomical entity transporter complex ATP-binding cassette (ABC) transporter complex cell periphery transmembrane transporter complex ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing maltose transport complex periplasmic space ATPase dependent transmembrane transport complex protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex cellular anatomical entity transporter complex ATP-binding cassette (ABC) transporter complex cell periphery transmembrane transporter complex ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing maltose transport complex periplasmic space outer membrane-bounded periplasmic space cell envelope intracellular anatomical structure cytoplasm cytosol somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection inclusion body membrane-bounded organelle intracellular organelle organelle vacuole autophagosome intracellular membrane-bounded organelle Golgi apparatus endomembrane system perinuclear region of cytoplasm axon microtubule organizing center cytoskeleton intracellular non-membrane-bounded organelle centriole microtubule cytoskeleton non-membrane-bounded organelle cytosolic region presynapse presynaptic cytosol synapse cell junction nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen intracellular vesicle cytoplasmic vesicle membrane vesicle membrane cytoplasmic vesicle vesicle organelle membrane early endosome endosome late endosome endoplasmic reticulum postsynapse postsynaptic cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR006061	Solute-binding family 1, conserved site	Conserved Site
A, B, C	IPR006060	Maltose/Cyclodextrin ABC transporter, substrate-binding protein	Family
A, B, C	IPR006059	Bacterial-type extracellular solute-binding protein	Family
A, B, C	IPR016024	Armadillo-type fold	Homologous Superfamily
A, B, C	IPR048412	Huntingtin, bridge	Repeat
A, B, C	IPR048411	Huntingtin, N-terminal, HEAT repeats 1	Repeat
A, B, C	IPR000091	Huntingtin	Family
A, B, C	IPR011989	Armadillo-like helical	Homologous Superfamily
A, B, C	IPR028426	Huntingtin family	Family
A, B, C	IPR024613	Huntingtin, N-terminal, HEAT repeats 2	Repeat
A, B, C	IPR048413	Huntingtin, C-terminal HEAT repeats	Repeat

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C	Pharos: P42858	Huntington disease manganese poisoning cadmium poisoning Lopes-Maciel-Rodan syndrome neurodegenerative disease toxic encephalopathy Akinetic-Rigid Variant of Huntington Disease dementia intellectual disability movement disorder Parkinson disease brain disease depressive disorder juvenile Huntington disease psoriasis Huntington disease manganese poisoning cadmium poisoning Lopes-Maciel-Rodan syndrome neurodegenerative disease toxic encephalopathy Akinetic-Rigid Variant of Huntington Disease dementia intellectual disability movement disorder Parkinson disease brain disease depressive disorder juvenile Huntington disease psoriasis endogenous depression

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.