ID   HBL2_GOSHI              Reviewed;         159 AA.
AC   Q93Y92;
DT   26-JUL-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   03-AUG-2022, entry version 70.
DE   RecName: Full=Non-symbiotic hemoglobin 2;
DE   AltName: Full=GOShi GLB2;
DE            Short=Hb2;
GN   Name=HB2; Synonyms=GLB2;
OS   Gossypium hirsutum (Upland cotton) (Gossypium mexicanum).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; malvids; Malvales; Malvaceae; Malvoideae; Gossypium.
OX   NCBI_TaxID=3635;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=11725952; DOI=10.1023/a:1012440926982;
RA   Hunt P.W., Watts R.A., Trevaskis B., Llewellyn D.J., Burnell J.,
RA   Dennis E.S., Peacock W.J.;
RT   "Expression and evolution of functionally distinct haemoglobin genes in
RT   plants.";
RL   Plant Mol. Biol. 47:677-692(2001).
CC   -!- FUNCTION: May not function as an oxygen storage or transport protein,
CC       but might act as an oxygen sensor or play a role in electron transfer,
CC       possibly to a bound oxygen molecule.
CC   -!- SIMILARITY: Belongs to the plant globin family. {ECO:0000305}.
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DR   EMBL; AY026340; AAK21604.1; -; Genomic_DNA.
DR   EMBL; AY026339; AAK21604.1; JOINED; Genomic_DNA.
DR   AlphaFoldDB; Q93Y92; -.
DR   SMR; Q93Y92; -.
DR   STRING; 3635.Q93Y92; -.
DR   OMA; DEMKEAW; -.
DR   Proteomes; UP000189702; Genome assembly.
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   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; Reference proteome.
FT   CHAIN           1..159
FT                   /note="Non-symbiotic hemoglobin 2"
FT                   /id="PRO_0000193015"
FT   BINDING         63
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         98
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   159 AA;  18097 MW;  9DB8A6F96C67820D CRC64;
     MGFTEKQEGL VKESWEVLKQ DIPHSSLRFF SLILEIAPGA KNMFSFLRES EEIPQNNPKL
     KAHAVKVFKM TCESAIQLRE KGEVVVADTT LKYLGTVHVK SGVKDPHFEV VKEALLRTIE
     EAIGEEKWNE EMKNAWGEAY DQLAEAIKAE MKNHHDETA