ID   HCYA_TACTR              Reviewed;          87 AA.
AC   P02243;
DT   21-JUL-1986, integrated into UniProtKB/Swiss-Prot.
DT   21-JUL-1986, sequence version 1.
DT   25-MAY-2022, entry version 72.
DE   RecName: Full=Hemocyanin alpha chain;
DE   Flags: Fragment;
OS   Tachypleus tridentatus (Japanese horseshoe crab).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Chelicerata; Merostomata;
OC   Xiphosura; Limulidae; Tachypleus.
OX   NCBI_TaxID=6853;
RN   [1]
RP   PROTEIN SEQUENCE.
RX   PubMed=7272331; DOI=10.1016/0005-2795(81)90051-9;
RA   Nemoto T., Takagi T.;
RT   "The amino acid sequence of the amino-terminal cyanogen bromide fragment of
RT   Tachypleus tridentatus hemocyanin alpha chain.";
RL   Biochim. Biophys. Acta 670:79-83(1981).
CC   -!- FUNCTION: Hemocyanins are copper-containing oxygen carriers occurring
CC       freely dissolved in the hemolymph of many mollusks and arthropods.
CC   -!- SUBUNIT: Polymer that contains six different types of chains (alpha,
CC       beta, gamma, delta, epsilon, and zeta).
CC   -!- SUBCELLULAR LOCATION: Secreted, extracellular space.
CC   -!- TISSUE SPECIFICITY: Hemolymph.
CC   -!- SIMILARITY: Belongs to the tyrosinase family. Hemocyanin subfamily.
CC       {ECO:0000305}.
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DR   PIR; A02567; A02567.
DR   AlphaFoldDB; P02243; -.
DR   SMR; P02243; -.
DR   PRIDE; P02243; -.
DR   GO; GO:0005615; C:extracellular space; IEA:UniProtKB-SubCell.
DR   GO; GO:0005344; F:oxygen carrier activity; IEA:UniProtKB-KW.
DR   Gene3D; 1.20.1370.10; -; 1.
DR   InterPro; IPR005204; Hemocyanin_N.
DR   InterPro; IPR036697; Hemocyanin_N_sf.
DR   Pfam; PF03722; Hemocyanin_N; 1.
DR   SUPFAM; SSF48050; SSF48050; 1.
PE   1: Evidence at protein level;
KW   Copper; Direct protein sequencing; Oxygen transport; Secreted; Transport.
FT   CHAIN           1..>87
FT                   /note="Hemocyanin alpha chain"
FT                   /id="PRO_0000204299"
FT   NON_TER         87
SQ   SEQUENCE   87 AA;  10203 MW;  61C3D271F72F36E7 CRC64;
     TIKEKQASIL ALFEHLTSVP KQHIPEKERD NRLHDVGHLS RGKLFSLFHR EHLEEATHLY
     EILHAAKNFD DFLLLCKQAR DFVNEGM