ID   GAMP_PROCL              Reviewed;          96 AA.
AC   Q7M3P2;
DT   10-MAY-2004, integrated into UniProtKB/Swiss-Prot.
DT   15-DEC-2003, sequence version 1.
DT   25-MAY-2022, entry version 29.
DE   RecName: Full=Gastrolith matrix protein;
DE   Flags: Fragment;
OS   Procambarus clarkii (Red swamp crayfish).
OC   Eukaryota; Metazoa; Ecdysozoa; Arthropoda; Crustacea; Multicrustacea;
OC   Malacostraca; Eumalacostraca; Eucarida; Decapoda; Pleocyemata; Astacidea;
OC   Astacoidea; Cambaridae; Procambarus.
OX   NCBI_TaxID=6728;
RN   [1]
RP   PROTEIN SEQUENCE, AND PROBABLE FUNCTION.
RX   PubMed=8987597; DOI=10.1271/bbb.60.1479;
RA   Ishii K., Yanagisawa T., Nagasawa H.;
RT   "Characterization of a matrix protein in the gastroliths of the crayfish
RT   Procambarus clarkii.";
RL   Biosci. Biotechnol. Biochem. 60:1479-1482(1996).
CC   -!- FUNCTION: Associates with chitin and plays a role in calcification.
CC   -!- SUBCELLULAR LOCATION: Secreted.
CC   -!- TISSUE SPECIFICITY: Expressed in the gastroliths.
CC   -!- PTM: The N-terminus is blocked.
CC   -!- MISCELLANEOUS: The gastrolith is a unique 'organ' that absorbs the
CC       calcium in the outer shell, allowing the shell to soften and break when
CC       it is necessary to shed it. The crayfish then re-absorbs the calcium
CC       from the 'gastrolith' and the shell becomes hard again.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   PIR; PC4212; PC4212.
DR   AlphaFoldDB; Q7M3P2; -.
DR   GO; GO:0005576; C:extracellular region; IEA:UniProtKB-SubCell.
DR   GO; GO:0008061; F:chitin binding; IEA:UniProtKB-KW.
DR   GO; GO:0031214; P:biomineral tissue development; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Biomineralization; Chitin-binding; Direct protein sequencing; Repeat;
KW   Secreted.
FT   CHAIN           <1..>96
FT                   /note="Gastrolith matrix protein"
FT                   /id="PRO_0000087429"
FT   REPEAT          11..15
FT                   /note="1"
FT   REPEAT          16..20
FT                   /note="2"
FT   REPEAT          21..25
FT                   /note="3"
FT   REPEAT          30..34
FT                   /note="4"
FT   REPEAT          35..39
FT                   /note="5"
FT   REPEAT          50..54
FT                   /note="6"
FT   REPEAT          55..59
FT                   /note="7"
FT   REPEAT          65..69
FT                   /note="8"
FT   REPEAT          70..74
FT                   /note="9"
FT   REGION          11..74
FT                   /note="9 X 5 AA tandem repeat of G-S-X-X-F"
FT   REGION          75..96
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   NON_TER         1
FT   NON_TER         96
SQ   SEQUENCE   96 AA;  8899 MW;  410D66810DA0BCCB CRC64;
     SPAALQSSSF GSAGFGSTNF GSSGFGPSLG STGFGSAGFA SPGFGSPSLG SAAFGSSSFG
     SPSLGSTGFG SSSFGSTSGL PYLVVIPNNP AVGGLR