3IA3 | pdb_00003ia3

A cis-proline in alpha-hemoglobin stabilizing Protein directs the structural reorganization of alpha-hemoglobin

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
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)
B	SCOP2B Superfamily	Globin-like	8039836	3000554	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Globin-like	8039836	3000554	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	AHSP-like	8044227	3001135	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	AHSP-like	8044227	3001135	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		e3ia3B1	A: Alpha-beta plaits	X: HMA-related	H: HMA, heavy metal-associated domain	T: Rib_hydrolayse	F:	ECOD (20:10:01)
D		e3ia3D1	A: HTH	X: HTH	H: tetra-helical, lambda repressor-like	T: YgbB	F:	ECOD (20:10:01)
A		e3ia3A1	A: Alpha-beta plaits	X: HMA-related	H: HMA, heavy metal-associated domain	T: Glutaredoxin	F:	ECOD (20:10:01)
C		e3ia3C1	A: HTH	X: HTH	H: tetra-helical, lambda repressor-like	T: YgbB	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

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

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, D	PF00042	Globin (Globin)	Globin		Domain
A, C	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, D	Hemoglobin subunit alpha	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	catabolic process hydrogen peroxide metabolic process reactive oxygen species metabolic process metabolic process cellular process hydrogen peroxide catabolic process developmental process multicellular organismal process erythrocyte development cellular developmental process homeostatic process hemopoiesis cell development erythrocyte differentiation catabolic process hydrogen peroxide metabolic process reactive oxygen species metabolic process metabolic process cellular process hydrogen peroxide catabolic process developmental process multicellular organismal process erythrocyte development cellular developmental process homeostatic process hemopoiesis cell development erythrocyte differentiation multicellular organismal-level homeostasis myeloid cell differentiation immune system process cell differentiation anatomical structure development myeloid cell development homeostasis of number of cells myeloid cell homeostasis erythrocyte homeostasis oxygen transport localization transport gas transport establishment of localization one-carbon compound transport carbon dioxide transport nitric oxide transport nitrogen compound transport response to stimulus defense response response to stress inflammatory response response to hydrogen peroxide response to oxidative 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
A, C	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

InterPro: Protein Family Classification InterPro Database Homepage

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

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B, D	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
A, C	Pharos: Q9NZD4	acute myeloid leukemia psoriasis MALT lymphoma tuberculosis osteosarcoma

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.