ID   HBP2_CASGL              Reviewed;         160 AA.
AC   P23244;
DT   01-NOV-1991, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1991, sequence version 1.
DT   03-AUG-2022, entry version 84.
DE   RecName: Full=Hemoglobin-2;
DE   AltName: Full=Hemoglobin II;
GN   Name=HBII;
OS   Casuarina glauca (Swamp oak).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Fagales; Casuarinaceae; Casuarina.
OX   NCBI_TaxID=3522;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1893106; DOI=10.1007/bf00020566;
RA   Christensen T., Dennis E.S., Peacock J.W., Landsmann J., Marcker K.A.;
RT   "Hemoglobin genes in non-legumes: cloning and characterization of a
RT   Casuarina glauca hemoglobin gene.";
RL   Plant Mol. Biol. 16:339-344(1991).
CC   -!- FUNCTION: Provides oxygen to the bacteroids. This role is essential for
CC       symbiotic nitrogen fixation.
CC   -!- SIMILARITY: Belongs to the plant globin family. {ECO:0000305}.
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DR   EMBL; X53950; CAA37898.1; -; Genomic_DNA.
DR   PIR; S13378; S13378.
DR   AlphaFoldDB; P23244; -.
DR   SMR; P23244; -.
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   Gene3D; 1.10.490.10; -; 1.
DR   InterPro; IPR000971; Globin.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR012292; Globin/Proto.
DR   InterPro; IPR001032; Leghaemoglobin.
DR   InterPro; IPR019824; Leghaemoglobin_Fe_BS.
DR   PANTHER; PTHR22924; PTHR22924; 1.
DR   Pfam; PF00042; Globin; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
DR   PROSITE; PS01033; GLOBIN; 1.
DR   PROSITE; PS00208; PLANT_GLOBIN; 1.
PE   3: Inferred from homology;
KW   Heme; Iron; Metal-binding; Nitrogen fixation; Oxygen transport; Transport.
FT   CHAIN           1..160
FT                   /note="Hemoglobin-2"
FT                   /id="PRO_0000192980"
FT   BINDING         69
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                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00238"
FT   BINDING         104
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"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00238"
SQ   SEQUENCE   160 AA;  17846 MW;  F28E401FD0AC7E8B CRC64;
     MSTLEGRGFT EEQEALVVKS WSAMKPNAGE LGLKFFLKIF EIAPSAQKLF SFLKDSNVPL
     ERNPKLKSHA MSVFLMTCES AVQLRKAGKV TVRESSLKKL GASHFKHGVA DEHFEVTKFA
     LLETIKEAVP ETWSPEMKNA WGEAYDKLVA AIKLEMKPSS