ID   HBA_ARAAR               Reviewed;         142 AA.
AC   P01996;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 91.
DE   RecName: Full=Hemoglobin subunit alpha-A;
DE   AltName: Full=Alpha-A-globin;
DE   AltName: Full=Hemoglobin alpha-A chain;
GN   Name=HBAA;
OS   Ara ararauna (Blue-and-yellow macaw).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC   Coelurosauria; Aves; Neognathae; Psittaciformes; Psittacidae; Ara.
OX   NCBI_TaxID=9226;
RN   [1]
RP   PROTEIN SEQUENCE OF 2-142.
RX   PubMed=4005049; DOI=10.1515/bchm3.1985.366.1.503;
RA   Godovac-Zimmermann J., Braunitzer G.;
RT   "The primary structure of alpha A- and beta-chains from blue- and-yellow
RT   macaw (Ara ararauna, Psittaci) hemoglobin. No evidence for expression of
RT   alpha D-chains.";
RL   Biol. Chem. Hoppe-Seyler 366:503-508(1985).
CC   -!- FUNCTION: Involved in oxygen transport from the lung to the various
CC       peripheral tissues.
CC   -!- SUBUNIT: Heterotetramer of two alpha chains and two beta chains.
CC   -!- TISSUE SPECIFICITY: Red blood cells.
CC   -!- SIMILARITY: Belongs to the globin family. {ECO:0000255|PROSITE-
CC       ProRule:PRU00238}.
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DR   PIR; A02317; HADLA.
DR   AlphaFoldDB; P01996; -.
DR   SMR; P01996; -.
DR   GO; GO:0005833; C:hemoglobin complex; IEA:InterPro.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR   GO; GO:0019825; F:oxygen binding; IEA:InterPro.
DR   GO; GO:0005344; F:oxygen carrier activity; IEA:UniProtKB-KW.
DR   CDD; cd08927; Hb-alpha-like; 1.
DR   Gene3D; 1.10.490.10; -; 1.
DR   InterPro; IPR000971; Globin.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR012292; Globin/Proto.
DR   InterPro; IPR002338; Hemoglobin_a-typ.
DR   InterPro; IPR002339; Hemoglobin_pi.
DR   Pfam; PF00042; Globin; 1.
DR   PRINTS; PR00612; ALPHAHAEM.
DR   PRINTS; PR00815; PIHAEM.
DR   SUPFAM; SSF46458; SSF46458; 1.
DR   PROSITE; PS01033; GLOBIN; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Heme; Iron; Metal-binding; Oxygen transport;
KW   Transport.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..142
FT                   /note="Hemoglobin subunit alpha-A"
FT                   /id="PRO_0000052558"
FT   BINDING         59
FT                   /ligand="heme b"
FT                   /ligand_id="ChEBI:CHEBI:60344"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="distal binding residue"
FT   BINDING         88
FT                   /ligand="heme b"
FT                   /ligand_id="ChEBI:CHEBI:60344"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="proximal binding residue"
SQ   SEQUENCE   142 AA;  15237 MW;  B66912DF5447AC3F CRC64;
     MVLSGSDKTN VKGIFSKIGG QAEDYGAEAL ERMFATFPQT KTYFPHFDVS PGSAQVKAHG
     KKVAAALVEA ANHIDDIATA LSKLSDLHAQ KLRVDPVNFK LLGQCFLVVV AIHNPSALTP
     EVHASLDKFL CAVGNVLTAK YR