Annotations: 1Y01

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1y01a_	All alpha proteins	Spectrin repeat-like	Alpha-hemoglobin stabilizing protein AHSP	Alpha-hemoglobin stabilizing protein AHSP	Alpha-hemoglobin stabilizing protein AHSP	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1y01b_	All alpha proteins	Globin-like	Globin-like	Globins	Hemoglobin, alpha-chain	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	AHSP-like	8044227	3001135	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Globin-like	8039836	3000554	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	AHSP	e1y01A1	A: alpha bundles	X: Spectrin repeat-like	H: Alpha-hemoglobin stabilizing protein AHSP (From Topology)	T: Alpha-hemoglobin stabilizing protein AHSP	F: AHSP	ECOD (1.6)
B	Globin	e1y01B1	A: alpha arrays	X: Globin-like (From Topology)	H: Globin-like (From Topology)	T: Globin-like	F: Globin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.58.420	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
B	1.10.490.10	Mainly Alpha	Orthogonal Bundle	Globin-like	Globins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF09236	Alpha-haemoglobin stabilising protein (AHSP)	Alpha-haemoglobin stabilising protein	Alpha-haemoglobin stabilising protein (AHSP) acts a molecular chaperone for free alpha-haemoglobin, preventing the harmful aggregation of alpha-haemoglobin during normal erythroid cell development: it specifically protects free alpha-haemoglobin from ...	Alpha-haemoglobin stabilising protein (AHSP) acts a molecular chaperone for free alpha-haemoglobin, preventing the harmful aggregation of alpha-haemoglobin during normal erythroid cell development: it specifically protects free alpha-haemoglobin from precipitation. AHSP adopts a helical secondary structure consisting of an elongated antiparallel three alpha-helix bundle [1].	Domain
B	PF00042	Globin (Globin)	Globin		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Alpha-hemoglobin stabilizing protein	hemoglobin binding protein binding binding unfolded protein binding	metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process hemoglobin metabolic process regulation of protein stability biological regulation regulation of biological quality protein stabilization developmental process cellular developmental process hemopoiesis cell differentiation metabolic process cellular process primary metabolic process protein metabolic process macromolecule metabolic process hemoglobin metabolic process regulation of protein stability biological regulation regulation of biological quality protein stabilization developmental process cellular developmental process hemopoiesis cell differentiation anatomical structure development cell development protein folding biosynthetic process gene expression macromolecule biosynthetic process protein maturation multicellular organismal process homeostatic process erythrocyte differentiation multicellular organismal-level homeostasis myeloid cell differentiation immune system process homeostasis of number of cells myeloid cell homeostasis erythrocyte homeostasis	protein-containing complex cellular anatomical structure intracellular anatomical structure hemoglobin complex cytoplasm cytosol
B	Hemoglobin alpha chain	oxygen binding binding small molecule binding oxygen carrier activity molecular carrier activity tetrapyrrole binding heme binding cation binding transition metal ion binding iron ion binding ion binding metal ion binding organic acid binding	catabolic process hydrogen peroxide metabolic process reactive oxygen species metabolic process metabolic process cellular process hydrogen peroxide catabolic process oxygen transport localization transport gas transport establishment of localization one-carbon compound transport carbon dioxide transport nitric oxide transport catabolic process hydrogen peroxide metabolic process reactive oxygen species metabolic process metabolic process cellular process hydrogen peroxide catabolic process oxygen transport localization transport gas transport establishment of localization one-carbon compound transport carbon dioxide transport nitric oxide transport nitrogen compound transport response to hydrogen peroxide response to oxidative stress response to stimulus response to stress response to chemical response to oxygen-containing compound response to reactive oxygen species cellular response to stimulus cellular detoxification cellular response to chemical stimulus detoxification cellular oxidant detoxification cellular response to toxic substance response to toxic substance	protein-containing complex cellular anatomical structure intracellular anatomical structure hemoglobin complex cytoplasm cytosol haptoglobin-hemoglobin complex membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle protein-containing complex cellular anatomical structure intracellular anatomical structure hemoglobin complex cytoplasm cytosol haptoglobin-hemoglobin complex membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle extracellular space vesicle extracellular membrane-bounded organelle blood microparticle intracellular vesicle membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle cytoplasmic vesicle organelle lumen endocytic vesicle lumen endocytic vesicle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036468	AHSP superfamily	Homologous Superfamily
A	IPR015317	Alpha-haemoglobin stabilising protein	Family
B	IPR002338	Hemoglobin, alpha-type	Family
B	IPR002339	Hemoglobin, pi	Family
B	IPR009050	Globin-like superfamily	Homologous Superfamily
B	IPR012292	Globin/Protoglobin	Homologous Superfamily
B	IPR000971	Globin	Domain
B	IPR050056	Hemoglobin and related oxygen transporters	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q9NZD4	acute myeloid leukemia psoriasis MALT lymphoma tuberculosis osteosarcoma
B	Pharos: P69905	alpha thalassemia Heinz body anemia acquired polycythemia vera methemoglobinemia hemoglobin H disease polycythemia familial hemolytic anemia alpha thalassemia-intellectual disability syndrome type 1 carcinoma sarcomatoid carcinoma Mammary Neoplasms, Experimental type 2 diabetes mellitus cerebral infarction hemolytic anemia inborn carbohydrate metabolic disorder alpha thalassemia Heinz body anemia acquired polycythemia vera methemoglobinemia hemoglobin H disease polycythemia familial hemolytic anemia alpha thalassemia-intellectual disability syndrome type 1 carcinoma sarcomatoid carcinoma Mammary Neoplasms, Experimental type 2 diabetes mellitus cerebral infarction hemolytic anemia inborn carbohydrate metabolic disorder mammary neoplasms, animal thalassemia congenital anemia facioscapulohumeral muscular dystrophy familial polycythemia hydrops fetalis lung adenocarcinoma beta thalassemia sickle cell anemia Hb Bart's hydrops fetalis hemoglobin M disease maturity-onset diabetes of the young breast carcinoma undifferentiated carcinoma diabetes mellitus

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.