Hemoglobin subunit alpha

HBA1
Available structures
PDB	Ortholog search: PDBe RCSB
List of PDB id codes
	1A00, 1A01, 1A0U, 1A0Z, 1A3N, 1A3O, 1A9W, 1ABW, 1ABY, 1AJ9, 1B86, 1BAB, 1BBB, 1BIJ, 1BUW, 1BZ0, 1BZ1, 1BZZ, 1C7B, 1C7C, 1C7D, 1CLS, 1CMY, 1COH, 1DKE, 1DXT, 1DXU, 1DXV, 1FDH, 1FN3, 1G9V, 1GBU, 1GBV, 1GLI, 1GZX, 1HAB, 1HAC, 1HBA, 1HBB, 1HBS, 1HCO, 1HDB, 1HGA, 1HGB, 1HGC, 1HHO, 1IRD, 1J3Y, 1J3Z, 1J40, 1J41, 1J7S, 1J7W, 1J7Y, 1JY7, 1K0Y, 1K1K, 1KD2, 1LFL, 1LFQ, 1LFT, 1LFV, 1LFY, 1LFZ, 1LJW, 1M9P, 1MKO, 1NEJ, 1NIH, 1NQP, 1O1I, 1O1J, 1O1K, 1O1L, 1O1M, 1O1N, 1O1O, 1O1P, 1QI8, 1QSH, 1QSI, 1QXD, 1QXE, 1R1X, 1R1Y, 1RPS, 1RQ3, 1RQ4, 1RQA, 1RVW, 1SDK, 1SDL, 1SHR, 1SI4, 1THB, 1UIW, 1VWT, 1XXT, 1XY0, 1XYE, 1XZ2, 1XZ4, 1XZ5, 1XZ7, 1XZU, 1XZV, 1Y01, 1Y09, 1Y0A, 1Y0C, 1Y0D, 1Y0T, 1Y0W, 1Y22, 1Y2Z, 1Y31, 1Y35, 1Y45, 1Y46, 1Y4B, 1Y4F, 1Y4G, 1Y4P, 1Y4Q, 1Y4R, 1Y4V, 1Y5F, 1Y5J, 1Y5K, 1Y7C, 1Y7D, 1Y7G, 1Y7Z, 1Y83, 1Y85, 1Y8W, 1YDZ, 1YE0, 1YE1, 1YE2, 1YEN, 1YEO, 1YEQ, 1YEU, 1YEV, 1YFF, 1YG5, 1YGD, 1YGF, 1YH9, 1YHE, 1YHR, 1YIE, 1YIH, 1YVQ, 1YVT, 1YZI, 1Z8U, 2D5Z, 2D60, 2DN1, 2DN2, 2DN3, 2DXM, 2H35, 2HBC, 2HBD, 2HBE, 2HBF, 2HBS, 2HCO, 2HHD, 2HHE, 2M6Z, 2W6V, 2W72, 2YRS, 3B75, 3D17, 3D7O, 3DUT, 3HXN, 3IA3, 3IC0, 3IC2, 3KMF, 3NL7, 3NMM, 3ODQ, 3ONZ, 3OO4, 3OO5, 3OVU, 3P5Q, 3QJB, 3QJC, 3QJD, 3QJE, 3R5I, 3S48, 3S65, 3S66, 3SZK, 3WCP, 3WHM, 4FC3, 4HHB, 4IJ2, 4L7Y, 4M4A, 4M4B, 4MQC, 4MQG, 4MQH, 4MQI, 4MQJ, 4MQK, 4N7N, 4N7O, 4N7P, 4N8T, 4NI0, 4NI1, 4ROL, 4ROM, 4WJG, 4X0L, 4XS0, 6HBW, 5E29, 5E6E, 5EE4, 5HU6, 5JDO, 5KDQ, 5E83,%%s1Y01, 1Z8U, 1BZ1
Identifiers
Aliases	HBA1, HBA-T3, HBH, hemoglobin subunit alpha 1, METHBA, ECYT7
External IDs	OMIM: 141800; MGI: 96015; HomoloGene: 469; GeneCards: HBA1; OMA:HBA1 - orthologs
Gene location (Human)
Chr.	Chromosome 16 (human)
End	177,522 bp
Gene location (Mouse)
Chr.	Chromosome 11 (mouse)
End	32,234,465 bp
RNA expression pattern
	Top expressed in
	monocyte; ; blood; ; bone marrow; ; bone marrow cell; ; placenta; ; spleen; ; ganglionic eminence; ; muscle of thigh; ; olfactory zone of nasal mucosa; ; apex of heart;
	Top expressed in
	bone marrow; ; spleen; ; lung; ; yolk sac; ; neural tube; ; mesencephalon; ; heart; ; cerebellar cortex; ; genital tubercle; ; zone of skin;
	More reference expression data
	n/a
Gene ontology
Molecular function	iron ion binding; oxygen binding; peroxidase activity; oxygen carrier activity; metal ion binding; protein binding; heme binding; haptoglobin binding; organic acid binding;
Cellular component	cytosol; endocytic vesicle lumen; blood microparticle; membrane; extracellular region; cytosolic small ribosomal subunit; hemoglobin complex; extracellular exosome; haptoglobin-hemoglobin complex; extracellular space;
Biological process	positive regulation of cell death; protein heterooligomerization; oxygen transport; receptor-mediated endocytosis; bicarbonate transport; hydrogen peroxide catabolic process; response to hydrogen peroxide; cellular oxidant detoxification; transport;
	Sources:Amigo / QuickGO
Orthologs
	3039
	15122
	ENSG00000206172
	ENSMUSG00000069919
	P69905
	Q91VB8
	NM_000558
	NM_008218
	NP_000508; NP_000508.1; NP_000549.1
	NP_001077424
	Wikidata
View/Edit Human	View/Edit Mouse

Hemoglobin subunit alpha, Hemoglobin, alpha 1,^[5] is a hemoglobin protein that in humans is encoded by the HBA1 gene.^[6]

Gene

The human alpha globin gene cluster located on chromosome 16 spans about 30 kb and includes seven loci: 5'- zeta - pseudozeta - mu - pseudoalpha-1 - alpha-2 - alpha-1 - theta - 3'. The alpha-2 (HBA2) and alpha-1 (HBA1; this gene) coding sequences are identical. These genes differ slightly over the 5' untranslated regions and the introns, but they differ significantly over the 3' untranslated regions.^[6]

Protein

Two alpha chains plus two beta chains constitute HbA, which in normal adult life accounts for about 97% of the total hemoglobin; alpha chains combine with delta chains to constitute HbA-2, which with fetal hemoglobin (HbF), composed of alpha and gamma chains, make up the remaining 3% of adult hemoglobin.^[6]

Clinical significance

Alpha thalassemias result from deletions of each of the alpha genes as well as deletions of both HBA2 and HBA1; some nondeletion alpha thalassemias have also been reported.^[6]

Interactions

Hemoglobin subunit alpha has been shown to interact with hemoglobin subunit beta (HBB).^[7]^[8]

References

^ ^a ^b ^c GRCh38: Ensembl release 89: ENSG00000206172 – Ensembl, May 2017
^ ^a ^b ^c GRCm38: Ensembl release 89: ENSMUSG00000069919 – Ensembl, May 2017
^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^ "HBA1 gene: MedlinePlus Genetics".
^ ^a ^b ^c ^d "Entrez Gene: HBA1 hemoglobin, alpha 1".
^ Stelzl U, Worm U, Lalowski M, Haenig C, Brembeck FH, Goehler H, Stroedicke M, Zenkner M, Schoenherr A, Koeppen S, Timm J, Mintzlaff S, Abraham C, Bock N, Kietzmann S, Goedde A, Toksöz E, Droege A, Krobitsch S, Korn B, Birchmeier W, Lehrach H, Wanker EE (September 2005). "A human protein-protein interaction network: a resource for annotating the proteome". Cell. 122 (6): 957–68. doi:10.1016/j.cell.2005.08.029. hdl:11858/00-001M-0000-0010-8592-0. PMID 16169070. S2CID 8235923.
^ Shaanan B (November 1983). "Structure of human oxyhaemoglobin at 2.1 A resolution". J. Mol. Biol. 171 (1): 31–59. doi:10.1016/S0022-2836(83)80313-1. PMID 6644819.