8CSY | pdb_00008csy

Local refinement of cytoplasmic domains of band3-I in class 2 of erythrocyte ankyrin-1 complex

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
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B [auth C]	SCOP2B Superfamily	Phoshotransferase/anion transport protein	8033412	3000490	SCOP2B (2022-06-29)
A [auth E]	SCOP2B Superfamily	Phoshotransferase/anion transport protein	8033412	3000490	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)
B [auth C]	zf-NPL4	e8csyC1	A: alpha arrays	X: cradle loop barrel	H: RIFT-related	T: FMN-binding split barrel	F: zf-NPL4	ECOD (v295.2)
A [auth E]	Peptidase_S29	e8csyE1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F: Peptidase_S29	ECOD (v295.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth E], B [auth C]	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 [auth E], B [auth C]	Band 3 anion transport protein	cytoskeletal protein binding ankyrin binding protein binding binding hemoglobin binding bicarbonate transmembrane transporter activity transporter activity transmembrane transporter activity chloride transmembrane transporter activity monoatomic anion transmembrane transporter activity bicarbonate:monoatomic anion antiporter activity secondary active transmembrane transporter activity antiporter activity active transmembrane transporter activity cytoskeletal protein binding ankyrin binding protein binding binding hemoglobin binding bicarbonate transmembrane transporter activity transporter activity transmembrane transporter activity chloride transmembrane transporter activity monoatomic anion transmembrane transporter activity bicarbonate:monoatomic anion antiporter activity secondary active transmembrane transporter activity antiporter activity active transmembrane transporter activity chloride:bicarbonate antiporter activity monoatomic ion transmembrane transporter activity solute:inorganic anion antiporter activity protein-membrane adaptor activity protein-macromolecule adaptor activity molecular adaptor activity identical protein binding protein homodimerization activity protein dimerization activity	transport monoatomic ion transmembrane transport establishment of localization chloride transport transmembrane transport localization chloride transmembrane transport monoatomic anion transport monoatomic anion transmembrane transport monoatomic ion transport cellular process inorganic anion transport cellular homeostasis chemical homeostasis transport monoatomic ion transmembrane transport establishment of localization chloride transport transmembrane transport localization chloride transmembrane transport monoatomic anion transport monoatomic anion transmembrane transport monoatomic ion transport cellular process inorganic anion transport cellular homeostasis chemical homeostasis homeostatic process monoatomic ion homeostasis intracellular chemical homeostasis intracellular monoatomic ion homeostasis bicarbonate transport biological regulation regulation of intracellular pH intracellular monoatomic cation homeostasis regulation of pH regulation of biological quality monoatomic cation homeostasis	cellular anatomical structure membrane intracellular anatomical structure intracellular membraneless organelle Z disc sarcomere intracellular organelle I band organelle membraneless organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril cellular anatomical structure membrane intracellular anatomical structure intracellular membraneless organelle Z disc sarcomere intracellular organelle I band organelle membraneless organelle contractile muscle fiber cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex ankyrin-1 complex protein-containing complex membrane protein complex extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region vesicle extracellular membrane-bounded organelle cell periphery plasma membrane basal part of cell basal plasma membrane plasma membrane region basolateral plasma membrane blood microparticle cytoplasmic side of plasma membrane cytoplasmic side of membrane side of membrane cell cortex cortical cytoskeleton cytoskeleton

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth E], B [auth C]	IPR013769	Band 3 cytoplasmic domain	Domain
A [auth E], B [auth C]	IPR001717	Anion exchange protein	Family
A [auth E], B [auth C]	IPR003020	Bicarbonate transporter, eukaryotic	Family
A [auth E], B [auth C]	IPR011531	Bicarbonate transporter-like, transmembrane domain	Domain
A [auth E], B [auth C]	IPR002977	Anion exchange protein 1	Family
A [auth E], B [auth C]	IPR016152	Phosphotransferase/anion transporter	Homologous Superfamily
A [auth E], B [auth C]	IPR018241	Anion exchange, conserved site	Conserved Site

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth E], B [auth C]	: P02730	hereditary elliptocytosis hereditary spherocytosis renal tubular acidosis hereditary spherocytosis type 4 cryohydrocytosis southeast Asian ovalocytosis hemolytic anemia renal tubular acidosis, distal, 4, with hemolytic anemia malaria hematologic disease Ovalocytosis, Malaysian-Melanesian-Filipino Type autosomal dominant distal renal tubular acidosis familial hemolytic anemia distal renal tubular acidosis MALT lymphoma hereditary elliptocytosis hereditary spherocytosis renal tubular acidosis hereditary spherocytosis type 4 cryohydrocytosis southeast Asian ovalocytosis hemolytic anemia renal tubular acidosis, distal, 4, with hemolytic anemia malaria hematologic disease Ovalocytosis, Malaysian-Melanesian-Filipino Type autosomal dominant distal renal tubular acidosis familial hemolytic anemia distal renal tubular acidosis MALT lymphoma renal tubular acidosis, distal, 3, with or without sensorineural hearing loss tuberculosis psoriasis osteosarcoma

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth E], B [auth C]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Solute Carrier Family 4 (anion exchanger)	Erythrocyte Band 3 anion exchanger complex. Band 3-Glycophorin A complex, outward facing

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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.