ID   HEMT2_PHAGO             Reviewed;          31 AA.
AC   P27687;
DT   01-AUG-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1992, sequence version 1.
DT   03-AUG-2022, entry version 77.
DE   RecName: Full=Myohemerythrin-2;
DE            Short=MHr-2;
DE   Flags: Fragment;
OS   Phascolopsis gouldii (Peanut worm) (Golfingia gouldii).
OC   Eukaryota; Metazoa; Spiralia; Lophotrochozoa; Sipuncula; Sipunculidea;
OC   Golfingiida; Sipunculidae; Phascolopsis.
OX   NCBI_TaxID=6442;
RN   [1]
RP   PROTEIN SEQUENCE, FUNCTION, SUBUNIT, AND TISSUE SPECIFICITY.
RC   TISSUE=Muscle;
RX   PubMed=1322702; DOI=10.1016/0167-4838(92)90315-5;
RA   Long R.C., Zhang J.-H., Kurtz D.M. Jr., Negri A., Tedeschi G., Bonomi F.;
RT   "Myohemerythrin from the sipunculid, Phascolopsis gouldii: purification,
RT   properties and amino acid sequence.";
RL   Biochim. Biophys. Acta 1122:136-142(1992).
CC   -!- FUNCTION: Myohemerythrin is an oxygen-binding protein found in the
CC       retractor muscles of certain worms. The oxygen-binding site contains
CC       two iron atoms. {ECO:0000269|PubMed:1322702}.
CC   -!- SUBUNIT: Monomer. {ECO:0000269|PubMed:1322702}.
CC   -!- TISSUE SPECIFICITY: Muscle. {ECO:0000269|PubMed:1322702}.
CC   -!- SIMILARITY: Belongs to the hemerythrin family. {ECO:0000305}.
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DR   PIR; PS0350; PS0350.
DR   AlphaFoldDB; P27687; -.
DR   SMR; P27687; -.
DR   GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR   GO; GO:0005344; F:oxygen carrier activity; IEA:UniProtKB-KW.
DR   InterPro; IPR002063; Haemerythrin.
DR   InterPro; IPR035938; Hemerythrin-like_sf.
DR   PRINTS; PR00186; HEMERYTHRIN.
DR   SUPFAM; SSF47188; SSF47188; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Iron; Metal-binding; Muscle protein;
KW   Oxygen transport; Transport.
FT   CHAIN           1..>31
FT                   /note="Myohemerythrin-2"
FT                   /id="PRO_0000191836"
FT   BINDING         25
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250|UniProtKB:P02244"
FT   NON_TER         31
SQ   SEQUENCE   31 AA;  3735 MW;  DA740CEE0FD9FDA1 CRC64;
     GFDIPEPYVW DESFRVFYDL LDDEHKGLFQ G