ID   HBA1_CATMA              Reviewed;         141 AA.
AC   P82111;
DT   24-JAN-2001, integrated into UniProtKB/Swiss-Prot.
DT   24-JAN-2001, sequence version 1.
DT   03-AUG-2022, entry version 77.
DE   RecName: Full=Hemoglobin subunit alpha-1;
DE   AltName: Full=Alpha-1-globin;
DE   AltName: Full=Hb 1;
DE   AltName: Full=Hemoglobin alpha-1 chain;
OS   Catharacta maccormicki (South polar skua) (Stercorarius maccormicki).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC   Coelurosauria; Aves; Neognathae; Charadriiformes; Stercorariidae;
OC   Stercorarius.
OX   NCBI_TaxID=395889;
RN   [1]
RP   PROTEIN SEQUENCE.
RC   TISSUE=Blood;
RX   PubMed=10998071; DOI=10.1046/j.1432-1327.2000.01699.x;
RA   Tamburrini M., Riccio A., Romano M., Giardina B., di Prisco G.;
RT   "Structural and functional analysis of the two haemoglobins of the
RT   antarctic seabird Catharacta maccormicki. Characterization of an additional
RT   phosphate binding site by molecular modelling.";
RL   Eur. J. Biochem. 267:6089-6098(2000).
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   AlphaFoldDB; P82111; -.
DR   SMR; P82111; -.
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   CHAIN           1..141
FT                   /note="Hemoglobin subunit alpha-1"
FT                   /id="PRO_0000052589"
FT   BINDING         58
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         87
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   141 AA;  15262 MW;  FE0A826AF71DF850 CRC64;
     VLSGSDKNNV KGVFGKIGGH AEEYGAETLE RMFATYPQTK TYFPHFDLQH GSAQVKAHGK
     KVAAALVEAA NHIDDISGAL SKLSDLHAQK LRVDPVNFKL LGQCFLVVVA IHHPSVLTPE
     VHASLDKFLC AVGNVLTAKY R