ID   HBA2_XENBO              Reviewed;         142 AA.
AC   P07431;
DT   01-APR-1988, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 90.
DE   RecName: Full=Hemoglobin subunit alpha-2;
DE   AltName: Full=Alpha-2-globin;
DE   AltName: Full=Hemoglobin alpha-2 chain;
DE   AltName: Full=Hemoglobin alpha-minor chain;
GN   Name=hba2;
OS   Xenopus borealis (Kenyan clawed frog).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Amphibia;
OC   Batrachia; Anura; Pipoidea; Pipidae; Xenopodinae; Xenopus; Xenopus.
OX   NCBI_TaxID=8354;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RX   PubMed=3100812; DOI=10.1007/bf02115578;
RA   Knoechel W., Korge E., Basner A., Meyerhof W.;
RT   "Globin evolution in the genus Xenopus: comparative analysis of cDNAs
RT   coding for adult globin polypeptides of Xenopus borealis and Xenopus
RT   tropicalis.";
RL   J. Mol. Evol. 23:211-223(1986).
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   EMBL; M32455; AAA49645.1; -; mRNA.
DR   PIR; D25929; D25929.
DR   AlphaFoldDB; P07431; -.
DR   SMR; P07431; -.
DR   GO; GO:0005833; C:hemoglobin complex; IEA:InterPro.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
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   Pfam; PF00042; Globin; 1.
DR   PRINTS; PR00612; ALPHAHAEM.
DR   SUPFAM; SSF46458; SSF46458; 1.
DR   PROSITE; PS01033; GLOBIN; 1.
PE   2: Evidence at transcript level;
KW   Heme; Iron; Metal-binding; Oxygen transport; Transport.
FT   INIT_MET        1
FT                   /note="Removed"
FT   CHAIN           2..142
FT                   /note="Hemoglobin subunit alpha-2"
FT                   /id="PRO_0000052806"
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;  15873 MW;  E9D6844B968F8D1F CRC64;
     MLLTADDKKH IKAILPSIAA HGDKFGGEAL YRMFLINPKT KTYFPNFDFH HNSKQISAHG
     KKVVDALNEA ANHLDNIAGS MSKLSDLHAY DLRVDPGNFP LLAHNILVTV AMYFPQQFDP
     HTHKALDKFL ASVSSVLTSK YR