Annotations: 8GVH

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00955	HCO3- transporter integral membrane domain (HCO3_cotransp)	HCO3- transporter integral membrane domain	This family contains Band 3 anion exchange proteins that exchange CL-/HCO3- such as Swiss:P48751. This family also includes cotransporters of Na+/HCO3- such as Swiss:O15153.	Domain
A, B	PF07565	Band 3 cytoplasmic domain (Band_3_cyto)	Band 3 cytoplasmic domain	This family contains the cytoplasmic domain of the Band 3 anion exchange proteins that exchange Cl-/HCO3-. Band 3 constitutes the most abundant polypeptide in the red blood cell membrane, comprising 25% of the total membrane protein. The cytoplasmic ...	This family contains the cytoplasmic domain of the Band 3 anion exchange proteins that exchange Cl-/HCO3-. Band 3 constitutes the most abundant polypeptide in the red blood cell membrane, comprising 25% of the total membrane protein. The cytoplasmic domain of band 3 functions primarily as an anchoring site for other membrane-associated proteins. Included among the protein ligands of cdb3 are ankyrin, protein 4.2, protein 4.1, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), phosphofructokinase, aldolase, hemoglobin, hemichromes, and the protein tyrosine kinase (p72syk). [1]	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Anion exchange protein 2	chloride transmembrane transporter activity monoatomic anion transmembrane transporter activity bicarbonate transmembrane transporter activity bicarbonate:monoatomic anion antiporter activity secondary active transmembrane transporter activity antiporter activity active monoatomic ion transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity chloride:bicarbonate antiporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity inorganic anion transmembrane transporter activity chloride transmembrane transporter activity monoatomic anion transmembrane transporter activity bicarbonate transmembrane transporter activity bicarbonate:monoatomic anion antiporter activity secondary active transmembrane transporter activity antiporter activity active monoatomic ion transmembrane transporter activity active transmembrane transporter activity inorganic molecular entity transmembrane transporter activity chloride:bicarbonate antiporter activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity inorganic anion transmembrane transporter activity organic anion transmembrane transporter activity solute:inorganic anion antiporter activity protein binding binding enzyme binding	developmental process spermatogenesis sexual reproduction reproductive process multicellular organismal reproductive process developmental process involved in reproduction male gamete generation gamete generation negative regulation of lymphocyte proliferation multicellular organismal process regulation of cellular process CD8-positive, alpha-beta T cell activation regulation of alpha-beta T cell activation regulation of leukocyte activation developmental process spermatogenesis sexual reproduction reproductive process multicellular organismal reproductive process developmental process involved in reproduction male gamete generation gamete generation negative regulation of lymphocyte proliferation multicellular organismal process regulation of cellular process CD8-positive, alpha-beta T cell activation regulation of alpha-beta T cell activation regulation of leukocyte activation CD8-positive, alpha-beta T cell proliferation negative regulation of biological process regulation of cell activation negative regulation of T cell proliferation negative regulation of cell adhesion negative regulation of leukocyte proliferation T cell activation alpha-beta T cell proliferation lymphocyte proliferation alpha-beta T cell activation regulation of immune system process regulation of leukocyte proliferation regulation of biological process cell population proliferation regulation of CD8-positive, alpha-beta T cell proliferation negative regulation of T cell activation negative regulation of leukocyte cell-cell adhesion mononuclear cell proliferation regulation of cell population proliferation negative regulation of cell-cell adhesion regulation of leukocyte cell-cell adhesion negative regulation of multicellular organismal process negative regulation of leukocyte activation lymphocyte activation negative regulation of lymphocyte activation leukocyte cell-cell adhesion leukocyte proliferation leukocyte activation negative regulation of mononuclear cell proliferation regulation of alpha-beta T cell proliferation cell adhesion cell-cell adhesion negative regulation of cellular process regulation of multicellular organismal process regulation of cell-cell adhesion T cell proliferation regulation of lymphocyte proliferation negative regulation of cell population proliferation regulation of cell adhesion cell activation biological regulation regulation of T cell activation negative regulation of CD8-positive, alpha-beta T cell activation negative regulation of cell activation regulation of T cell proliferation negative regulation of alpha-beta T cell proliferation negative regulation of immune system process immune system process regulation of mononuclear cell proliferation cellular process negative regulation of CD8-positive, alpha-beta T cell proliferation negative regulation of alpha-beta T cell activation regulation of CD8-positive, alpha-beta T cell activation regulation of lymphocyte activation regulation of cytoskeleton organization regulation of cellular component organization regulation of actin filament-based process actin cytoskeleton organization regulation of organelle organization cellular component organization organelle organization regulation of actin cytoskeleton organization actin filament-based process cellular component organization or biogenesis cytoskeleton organization multicellular organism development digestive system development tube development anatomical structure development digestive tract development system development localization bicarbonate transport organic anion transport transport establishment of localization enamel mineralization tooth mineralization regulation of developmental process odontogenesis of dentin-containing tooth positive regulation of biological process regulation of biomineral tissue development positive regulation of enamel mineralization positive regulation of developmental process positive regulation of biomineral tissue development animal organ morphogenesis biomineral tissue development regulation of multicellular organismal development odontogenesis animal organ development amelogenesis tissue development anatomical structure morphogenesis regulation of tooth mineralization regulation of enamel mineralization positive regulation of tooth mineralization anatomical structure formation involved in morphogenesis monoatomic anion transport monoatomic ion transport homeostatic process regulation of bone remodeling tissue homeostasis regulation of tissue remodeling regulation of bone resorption bone resorption multicellular organismal-level homeostasis tissue remodeling bone remodeling anatomical structure homeostasis transmembrane transport myeloid leukocyte differentiation cellular developmental process hemopoiesis cell development myeloid cell differentiation cell differentiation osteoclast differentiation leukocyte differentiation regulation of intracellular pH cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis regulation of pH monoatomic ion homeostasis intracellular chemical homeostasis regulation of biological quality monoatomic cation homeostasis regulation of cellular pH intracellular monoatomic ion homeostasis regulation of leukocyte differentiation mononuclear cell differentiation regulation of cell differentiation lymphocyte differentiation regulation of cell development negative regulation of T cell differentiation T cell differentiation negative regulation of hemopoiesis negative regulation of leukocyte differentiation negative regulation of lymphocyte differentiation CD8-positive, alpha-beta T cell differentiation negative regulation of CD8-positive, alpha-beta T cell differentiation regulation of alpha-beta T cell differentiation negative regulation of alpha-beta T cell differentiation regulation of T cell differentiation alpha-beta T cell differentiation negative regulation of cell differentiation regulation of lymphocyte differentiation negative regulation of developmental process regulation of CD8-positive, alpha-beta T cell differentiation negative regulation of cell development regulation of hemopoiesis	anchoring junction cell junction cellular anatomical entity focal adhesion cell-substrate junction membrane cell periphery apical part of cell plasma membrane plasma membrane region apical plasma membrane basal part of cell basal plasma membrane basolateral plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR013769	Band 3 cytoplasmic domain	Domain
A, B	IPR001717	Anion exchange protein	Family
A, B	IPR003020	Bicarbonate transporter, eukaryotic	Family
A, B	IPR002978	Anion exchange protein 2	Family
A, B	IPR011531	Bicarbonate transporter-like, transmembrane domain	Domain
A, B	IPR016152	Phosphotransferase/anion transporter	Homologous Superfamily
A, B	IPR018241	Anion exchange, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B	Pharos: P04920	primary biliary cholangitis autosomal recessive polycystic kidney disease prostate cancer choledochal cyst medulloblastoma ovarian cancer Prostatic Neoplasms allergic rhinitis atypical teratoid rhabdoid tumor hypertensive disorder malignant ependymoma metabolic syndrome X astrocytic tumor cerebrovascular disorder large cell medulloblastoma primary biliary cholangitis autosomal recessive polycystic kidney disease prostate cancer choledochal cyst medulloblastoma ovarian cancer Prostatic Neoplasms allergic rhinitis atypical teratoid rhabdoid tumor hypertensive disorder malignant ependymoma metabolic syndrome X astrocytic tumor cerebrovascular disorder large cell medulloblastoma malignant glioma myocardial infarction atrial fibrillation glioblastoma lung cancer

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B	OPM	Transmembrane	Alpha-helical polytopic	APC (Amino acid-Polyamine-organoCation) superfamily	Anion exchanger family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Solute Carrier Family 4 (anion exchanger)	non-erythroid band 3-like protein (AE2) anion exchanger 2, acidic KNO₃ condition

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.