Annotations: 8V91

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	Aquaporin-like	8072768	3000508	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Aquaporin-like	8072768	3000508	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Aquaporin-like	8072768	3000508	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Aquaporin-like	8072768	3000508	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)
E [auth I]	HATPase_c	e8v91I01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F: HATPase_c	ECOD (v294.1)
F [auth J]	HATPase_c	e8v91J01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F: HATPase_c	ECOD (v294.1)
A	HATPase_c	e8v91A01	A: a/b three-layered sandwiches	X: ATP-grasp_6	H: ATP-grasp_6	T: ATP-grasp_6	F: HATPase_c	ECOD (v294.1)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
E [auth I]	Light Chain	IGKV1	Kappa	aquaporin-4 \| aquaporin-4	SAbDab (2026-03-27)
F [auth J]	Heavy Chain	IGHV3	-	aquaporin-4 \| aquaporin-4	SAbDab (2026-03-27)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E [auth I]	rAB 58 Light Chain	-	-	-
F [auth J]	rAB 58 Heavy Chain	-	-	-
A, B, C, D	Aquaporin-4	passive transmembrane transporter activity water transmembrane transporter activity channel activity transporter activity transmembrane transporter activity water channel activity identical protein binding protein binding binding	multicellular organismal process system process nervous system process transport establishment of localization localization epithelial cilium movement involved in extracellular fluid movement extracellular transport microtubule-based transport microtubule-based movement microtubule-based process cellular process cerebrospinal fluid circulation cilium movement multicellular organismal process system process nervous system process transport establishment of localization localization epithelial cilium movement involved in extracellular fluid movement extracellular transport microtubule-based transport microtubule-based movement microtubule-based process cellular process cerebrospinal fluid circulation cilium movement biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response response to type II interferon response to cytokine defense response to symbiont response to external stimulus cellular response to type II interferon response to biotic stimulus response to peptide response to chemical immune system process defense response to other organism response to stress innate immune response cellular response to cytokine stimulus response to external biotic stimulus protein-containing complex organization protein homotetramerization cellular component organization cellular component biogenesis cellular component assembly protein complex oligomerization protein tetramerization protein-containing complex assembly protein homooligomerization cellular component organization or biogenesis regulation of body fluid levels multicellular organismal-level homeostasis chemical homeostasis homeostatic process multicellular organismal-level water homeostasis multicellular organismal-level chemical homeostasis biological regulation regulation of biological quality fluid transport water transport renal system process renal water homeostasis regulation of cellular component size cell volume homeostasis cellular homeostasis intracellular water homeostasis intracellular chemical homeostasis regulation of cell size regulation of anatomical structure size	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular region glial cell projection cell projection plasma membrane bounded cell projection astrocyte end-foot astrocyte projection endosome membrane cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane extracellular region glial cell projection cell projection plasma membrane bounded cell projection astrocyte end-foot astrocyte projection endosome membrane membrane-bounded organelle intracellular anatomical structure endosome intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle cytoplasmic vesicle membrane bounding membrane of organelle vesicle membrane cytoplasmic vesicle organelle cytoplasm vesicle organelle membrane sarcolemma basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR034294	Aquaporin transporter	Family
A, B, C, D	IPR022357	Major intrinsic protein, conserved site	Conserved Site
A, B, C, D	IPR023271	Aquaporin-like	Homologous Superfamily
A, B, C, D	IPR000425	Major intrinsic protein	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	Pharos: P55087	status epilepticus neuromyelitis optica lung adenocarcinoma Duchenne muscular dystrophy spinal cord disease Familial Ménière disease acute disseminated encephalomyelitis malignant ependymoma atypical teratoid rhabdoid tumor autoimmune disease breast cancer peripheral neuropathy chronic kidney disease depressive disorder psoriasis status epilepticus neuromyelitis optica lung adenocarcinoma Duchenne muscular dystrophy spinal cord disease Familial Ménière disease acute disseminated encephalomyelitis malignant ependymoma atypical teratoid rhabdoid tumor autoimmune disease breast cancer peripheral neuropathy chronic kidney disease depressive disorder psoriasis Down syndrome sinusitis Emery-Dreifuss muscular dystrophy gastric carcinoma large cell medulloblastoma lung cancer malignant glioma autism myopathy Becker muscular dystrophy non-small cell lung carcinoma breast carcinoma primitive neuroectodermal tumor dermatomyositis schizophrenia endogenous depression spinal cord injury glioblastoma limb-girdle muscular dystrophy lung carcinoma atrial fibrillation medulloblastoma brain edema oligodendroglioma cerebrovascular disorder pituitary cancer demyelinating disease progressive supranuclear palsy

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.