ID   MTB_SPHGR               Reviewed;          67 AA.
AC   Q26496;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 60.
DE   RecName: Full=Metallothionein-B;
DE            Short=MTB;
DE   Flags: Fragment;
OS   Sphaerechinus granularis (Purple sea urchin).
OC   Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Echinozoa; Echinoidea;
OC   Euechinoidea; Echinacea; Temnopleuroida; Toxopneustidae; Sphaerechinus.
OX   NCBI_TaxID=39374;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   TISSUE=Egg;
RX   PubMed=9176568; DOI=10.1007/s000180050058;
RA   Scudiero R., Capasso C., Carginale V., Riggio M., Capasso A.,
RA   Ciaramella M., Filosa S., Parisi E.;
RT   "PCR amplification and cloning of metallothionein complementary DNAs in
RT   temperate and Antarctic sea urchin characterized by a large difference in
RT   egg metallothionein content.";
RL   Cell. Mol. Life Sci. 53:472-477(1997).
CC   -!- FUNCTION: Metallothioneins have a high content of cysteine residues
CC       that bind various heavy metals.
CC   -!- SIMILARITY: Belongs to the metallothionein superfamily. Type 4 family.
CC       {ECO:0000305}.
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DR   EMBL; Z67877; CAA91784.1; -; mRNA.
DR   AlphaFoldDB; Q26496; -.
DR   SMR; Q26496; -.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   InterPro; IPR017980; Metalthion_4_echinoid/annelid.
DR   InterPro; IPR001396; Metalthion_4_echinoidea.
DR   InterPro; IPR017854; Metalthion_dom_sf.
DR   Pfam; PF05522; Metallothio_6; 1.
DR   PRINTS; PR00873; MTECHINOIDEA.
DR   SUPFAM; SSF57868; SSF57868; 2.
PE   2: Evidence at transcript level;
KW   Metal-binding; Metal-thiolate cluster.
FT   CHAIN           <1..67
FT                   /note="Metallothionein-B"
FT                   /id="PRO_0000197350"
FT   NON_TER         1
SQ   SEQUENCE   67 AA;  6576 MW;  468244876C5C565F CRC64;
     PGPDVKCVCC QDGEECPCKG GECCITGTCC KEGDGLCCGK CSNAACKCAD GCKCGSGCSC
     TLGNCTC