Annotations: 8V2Q

CHMP1B/IST1 ssRNA bound copolymer

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
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	IST1/CHMP3-like	8055750	3002301	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	IST1/CHMP3-like	8055735	3002301	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	HATPase_c	e8v2qA01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F: HATPase_c	ECOD (v294.1)
B	HATPase_c	e8v2qB01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F: HATPase_c	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF03357	Snf7 (Snf7)	Snf7	-	Family
B	PF03398	Regulator of Vps4 activity in the MVB pathway (Ist1)	Regulator of Vps4 activity in the MVB pathway	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Charged multivesicular body protein 1b	protein binding binding protein domain specific binding MIT domain binding identical protein binding	cellular localization transport intracellular transport establishment of localization vesicle-mediated transport localization intercellular transport late endosome to vacuole transport establishment of localization in cell cellular process vacuolar transport membrane fusion organelle membrane fusion endosome to lysosome transport cellular localization transport intracellular transport establishment of localization vesicle-mediated transport localization intercellular transport late endosome to vacuole transport establishment of localization in cell cellular process vacuolar transport membrane fusion organelle membrane fusion endosome to lysosome transport lysosomal transport multivesicular body-lysosome fusion cellular component organization vesicle organization endosome to lysosome transport via multivesicular body sorting pathway lysosome organization cellular component organization or biogenesis endosome transport via multivesicular body sorting pathway membrane organization vacuole organization lytic vacuole organization lysosomal membrane organization endosomal transport organelle fusion organelle organization multivesicular body sorting pathway vesicle fusion cellular component disassembly catabolic process protein-containing complex organization macroautophagy autophagy protein-containing complex disassembly autophagosome maturation metabolic process process utilizing autophagic mechanism membrane biogenesis nuclear membrane reassembly membrane assembly nuclear membrane organization cellular component biogenesis nucleus organization cellular component assembly nuclear envelope organization endomembrane system organization establishment of protein localization organelle assembly multivesicular body assembly multivesicular body organization endosome organization cell division protein transport macromolecule localization intracellular protein localization primary metabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process ubiquitin-dependent protein catabolic process via the multivesicular body sorting pathway ubiquitin-dependent protein catabolic process protein metabolic process macromolecule metabolic process mitotic nuclear division mitotic metaphase chromosome alignment organelle fission chromosome organization sister chromatid segregation mitotic cell cycle metaphase chromosome alignment nuclear division mitotic cell cycle process chromosome localization organelle localization nuclear chromosome segregation mitotic sister chromatid segregation cell cycle chromosome segregation cell cycle process regulation of cytoskeleton organization regulation of cellular component organization regulation of cellular process microtubule cytoskeleton organization regulation of mitotic spindle organization membraneless organelle assembly regulation of mitotic spindle assembly regulation of cell cycle microtubule cytoskeleton organization involved in mitosis spindle organization regulation of biological process regulation of cell cycle process biological regulation regulation of microtubule-based process regulation of spindle organization regulation of cellular component biogenesis spindle assembly regulation of organelle organization mitotic spindle organization regulation of spindle assembly mitotic spindle assembly regulation of organelle assembly microtubule-based process cytoskeleton organization regulation of microtubule cytoskeleton organization microtubule organizing center organization regulation of centrosome cycle centrosome duplication centrosome cycle regulation of centrosome duplication cytoskeleton-dependent cytokinesis mitotic cytokinetic process mitotic cytokinesis cytokinesis midbody abscission cytokinetic process virion assembly viral process viral budding viral budding via host ESCRT complex viral life cycle membrane fission biological process involved in interspecies interaction between organisms non-lytic viral release biological process involved in interaction with host biological process involved in symbiotic interaction exit from host cell viral budding from plasma membrane viral release from host cell late endosome to lysosome transport wound healing response to stimulus plasma membrane repair response to stress plasma membrane organization response to wounding vesicle fusion with vacuole vacuole fusion ESCRT III complex disassembly ESCRT complex disassembly	midbody cellular anatomical structure membrane-bounded organelle endosome membrane intracellular anatomical structure endosome membrane multivesicular body membrane intracellular vesicle late endosome membrane intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle membrane midbody cellular anatomical structure membrane-bounded organelle endosome membrane intracellular anatomical structure endosome membrane multivesicular body membrane intracellular vesicle late endosome membrane intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle membrane bounding membrane of organelle cytoplasmic vesicle vesicle membrane organelle late endosome cytoplasm vesicle organelle membrane multivesicular body extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular membrane-bounded organelle cytosol protein-containing complex ESCRT complex membrane protein complex ESCRT III complex cell periphery plasma membrane vacuolar membrane autophagosome membrane vacuole autophagosome amphisome membrane amphisome nucleus nuclear protein-containing complex organelle envelope nuclear envelope nuclear pore membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen polymeric cytoskeletal fiber spindle intracellular membraneless organelle spindle microtubule kinetochore microtubule cytoskeleton membraneless organelle supramolecular fiber microtubule supramolecular polymer supramolecular complex microtubule cytoskeleton lytic vacuole lytic vacuole membrane lysosomal membrane lysosome chromosome chromosomal region kinetochore chromosome, centromeric region condensed chromosome, centromeric region condensed chromosome membrane coat coated membrane
B	IST1 homolog	protein binding binding protein domain specific binding MIT domain binding cell adhesion molecule binding cadherin binding protein-containing complex binding identical protein binding	cytoskeleton-dependent cytokinesis cellular process cytokinesis cell division cell cycle cell cycle process localization establishment of protein localization establishment of localization organelle assembly multivesicular body assembly vesicle organization cellular component organization cellular component biogenesis cytoskeleton-dependent cytokinesis cellular process cytokinesis cell division cell cycle cell cycle process localization establishment of protein localization establishment of localization organelle assembly multivesicular body assembly vesicle organization cellular component organization cellular component biogenesis organelle organization cellular component assembly multivesicular body organization endosome organization cellular component organization or biogenesis endomembrane system organization protein transport transport macromolecule localization intracellular protein localization membrane organization mitotic cytokinetic process mitotic cytokinesis mitotic cell cycle mitotic cell cycle process midbody abscission cytokinetic process multicellular organismal process axonogenesis cellular developmental process developmental growth cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell growth cell morphogenesis neurogenesis multicellular organism development cell projection morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation anatomical structure development system development developmental process collateral sprouting plasma membrane bounded cell projection organization developmental cell growth growth nervous system development axon development cell morphogenesis involved in neuron differentiation developmental growth involved in morphogenesis generation of neurons anatomical structure morphogenesis neuron development regulation of biological process regulation of cellular process positive regulation of protein metabolic process regulation of protein metabolic process biological regulation positive regulation of biological process primary metabolic process regulation of macromolecule metabolic process regulation of primary metabolic process positive regulation of metabolic process regulation of proteolysis proteolysis positive regulation of proteolysis metabolic process positive regulation of macromolecule metabolic process protein metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process positive regulation of nervous system development regulation of growth regulation of cellular component size regulation of cell differentiation regulation of neurogenesis regulation of cell development positive regulation of developmental process positive regulation of cell projection organization regulation of biological quality positive regulation of developmental growth positive regulation of collateral sprouting regulation of cell projection organization positive regulation of cell development positive regulation of multicellular organismal process regulation of neuron projection development regulation of collateral sprouting regulation of cellular component organization positive regulation of cellular component organization regulation of developmental process regulation of nervous system development regulation of extent of cell growth positive regulation of cell differentiation regulation of axonogenesis positive regulation of neurogenesis regulation of multicellular organismal process regulation of anatomical structure morphogenesis positive regulation of axonogenesis regulation of cell size regulation of multicellular organismal development regulation of developmental growth positive regulation of cell growth regulation of cell growth positive regulation of growth regulation of plasma membrane bounded cell projection organization regulation of anatomical structure size cellular component disassembly protein-containing complex organization protein-containing complex disassembly ESCRT III complex disassembly ESCRT complex disassembly	midbody cellular anatomical structure membrane-bounded organelle intracellular organelle organelle envelope intracellular anatomical structure organelle nuclear envelope nucleus intracellular membrane-bounded organelle endomembrane system extracellular exosome extracellular vesicle extracellular organelle midbody cellular anatomical structure membrane-bounded organelle intracellular organelle organelle envelope intracellular anatomical structure organelle nuclear envelope nucleus intracellular membrane-bounded organelle endomembrane system extracellular exosome extracellular vesicle extracellular organelle extracellular region vesicle extracellular membrane-bounded organelle centrosome microtubule organizing center cytoskeleton membraneless organelle intracellular membraneless organelle microtubule cytoskeleton cytoplasm cytosol lytic vacuole intracellular vesicle membrane-enclosed lumen cytoplasmic vesicle lumen vacuolar lumen intracellular organelle lumen cytoplasmic vesicle lysosome vesicle lumen azurophil granule vacuole secretory granule lumen azurophil granule lumen organelle lumen secretory granule primary lysosome secretory vesicle chromatin chromosome Flemming body endoplasmic reticulum-Golgi intermediate compartment

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR005024	Snf7 family	Family
B	IPR005061	Vacuolar protein sorting-associated protein Ist1	Family
B	IPR042277	Vacuolar protein sorting-associated protein IST1-like	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: Q7LBR1	bipolar disorder malignant mesothelioma tuberculosis interstitial lung disease myopathy lung cancer osteosarcoma
B	: P53990	astrocytic tumor large cell medulloblastoma breast carcinoma osteosarcoma glioblastoma ovarian cancer

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.