ID   GLB1_TYLHE              Reviewed;         139 AA.
AC   P02219;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   21-JUL-1986, sequence version 1.
DT   03-AUG-2022, entry version 83.
DE   RecName: Full=Extracellular globin-1;
DE   AltName: Full=Erythrocruorin;
DE   AltName: Full=Extracellular globin I;
OS   Tylorrhynchus heterochaetus (Marine worm) (Nereis heterochaeta).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Annelida; Polychaeta;
OC   Errantia; Phyllodocida; Nereididae; Tylorrhynchus.
OX   NCBI_TaxID=6361;
RN   [1]
RP   PROTEIN SEQUENCE.
RA   Suzuki T., Takagi T., Gotoh T.;
RT   "Amino acid sequence of the smallest polypeptide chain containing heme of
RT   extracellular hemoglobin from the polychaete Tylorrhynchus heterochaetus.";
RL   Biochim. Biophys. Acta 708:253-258(1982).
RN   [2]
RP   DISULFIDE BONDS.
RX   PubMed=3192547; DOI=10.1016/s0021-9258(19)81390-x;
RA   Suzuki T., Kapp O.H., Gotoh T.;
RT   "Novel S-S loops in the giant hemoglobin of Tylorrhynchus heterochaetus.";
RL   J. Biol. Chem. 263:18524-18529(1988).
CC   -!- SUBUNIT: The giant hemoglobins of worms are formed of a monomeric
CC       subunit and a disulfide-bonded trimer. This subunit is monomeric.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- SIMILARITY: Belongs to the globin family. {ECO:0000255|PROSITE-
CC       ProRule:PRU00238}.
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DR   PIR; A02541; GGWNS.
DR   AlphaFoldDB; P02219; -.
DR   SMR; P02219; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
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; cd01040; Mb-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; IPR014610; Haemoglobin_extracell.
DR   InterPro; IPR044399; Mb-like_M.
DR   Pfam; PF00042; Globin; 1.
DR   PIRSF; PIRSF036517; Ext_hemo; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
DR   PROSITE; PS01033; GLOBIN; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Disulfide bond; Heme; Iron; Metal-binding;
KW   Oxygen transport; Secreted; Transport.
FT   CHAIN           1..139
FT                   /note="Extracellular globin-1"
FT                   /id="PRO_0000052510"
FT   BINDING         94
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"
FT   DISULFID        3..128
FT                   /evidence="ECO:0000269|PubMed:3192547"
SQ   SEQUENCE   139 AA;  15705 MW;  02396BED2FD1A2E6 CRC64;
     TDCGILQRIK VKQQWAQVYS VGESRTDFAI DVFNNFFRTN PDRSLFNRVN GDNVYSPEFK
     AHMVRVFAGF DILISVLDDK PVLDQALAHY AAFHKQFGTI PFKAFGQTMF QTIAEHIHGA
     DIGAWRACYA EQIVTGITA